./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/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 34aba2e0444cf7168338399e1c016871ad9a3305ff2dee9e611b86f3cad834b5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:22:07,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:22:07,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:22:07,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:22:07,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:22:07,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:22:07,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:22:07,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:22:07,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:22:07,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:22:07,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:22:07,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:22:07,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:22:07,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:22:07,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:22:07,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:22:07,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:22:07,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:22:07,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:22:07,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:22:07,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:22:07,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:22:07,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:22:07,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:22:07,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:22:07,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:22:07,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:22:07,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:22:07,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:22:07,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:22:07,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:22:07,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:22:07,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:22:07,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:22:07,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:22:07,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:22:07,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:22:07,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:22:07,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:22:07,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:22:07,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:22:07,702 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:22:07,749 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:22:07,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:22:07,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:22:07,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:22:07,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:22:07,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:22:07,759 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:22:07,759 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:22:07,760 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:22:07,760 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:22:07,761 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:22:07,762 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:22:07,762 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:22:07,762 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:22:07,762 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:22:07,763 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:22:07,763 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:22:07,763 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:22:07,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:22:07,765 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:22:07,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:22:07,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:22:07,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:22:07,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:22:07,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:22:07,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:22:07,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:22:07,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:22:07,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:22:07,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:22:07,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:22:07,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:22:07,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:22:07,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:22:07,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:22:07,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:22:07,770 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:22:07,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:22:07,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:22:07,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:22:07,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:22:07,772 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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34aba2e0444cf7168338399e1c016871ad9a3305ff2dee9e611b86f3cad834b5 [2021-11-25 20:22:08,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:22:08,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:22:08,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:22:08,145 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:22:08,146 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:22:08,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-25 20:22:08,227 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/data/50fd8eb86/31edb43eb3604b6d9b2b061757993757/FLAGceee7addd [2021-11-25 20:22:08,930 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:22:08,934 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-25 20:22:08,960 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/data/50fd8eb86/31edb43eb3604b6d9b2b061757993757/FLAGceee7addd [2021-11-25 20:22:09,115 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/data/50fd8eb86/31edb43eb3604b6d9b2b061757993757 [2021-11-25 20:22:09,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:22:09,120 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:22:09,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:22:09,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:22:09,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:22:09,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:22:09" (1/1) ... [2021-11-25 20:22:09,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520771de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:09, skipping insertion in model container [2021-11-25 20:22:09,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:22:09" (1/1) ... [2021-11-25 20:22:09,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:22:09,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:22:09,569 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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2021-11-25 20:22:09,634 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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2021-11-25 20:22:09,650 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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2021-11-25 20:22:09,657 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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2021-11-25 20:22:09,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:22:09,894 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:22:10,004 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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2021-11-25 20:22:10,068 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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2021-11-25 20:22:10,097 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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2021-11-25 20:22:10,117 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_398ced32-49f7-4317-ac6b-c71dd9d79c3f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2021-11-25 20:22:10,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:22:10,374 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:22:10,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10 WrapperNode [2021-11-25 20:22:10,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:22:10,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:22:10,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:22:10,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:22:10,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,558 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2418 [2021-11-25 20:22:10,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:22:10,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:22:10,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:22:10,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:22:10,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:22:10,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:22:10,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:22:10,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:22:10,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (1/1) ... [2021-11-25 20:22:10,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:22:10,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:10,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:22:10,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:22:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:22:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:22:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:22:10,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:22:11,020 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:22:11,022 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:22:12,420 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:22:12,610 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:22:12,611 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:22:12,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:22:12 BoogieIcfgContainer [2021-11-25 20:22:12,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:22:12,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:22:12,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:22:12,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:22:12,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:22:09" (1/3) ... [2021-11-25 20:22:12,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f97190f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:22:12, skipping insertion in model container [2021-11-25 20:22:12,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:10" (2/3) ... [2021-11-25 20:22:12,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f97190f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:22:12, skipping insertion in model container [2021-11-25 20:22:12,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:22:12" (3/3) ... [2021-11-25 20:22:12,626 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-25 20:22:12,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:22:12,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 20:22:12,684 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:22:12,691 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 20:22:12,692 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 20:22:12,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 426 states, 421 states have (on average 1.8598574821852731) internal successors, (783), 425 states have internal predecessors, (783), 0 states have call successors, (0), 0 states 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 20:22:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:22:12,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:12,753 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] [2021-11-25 20:22:12,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash 34120099, now seen corresponding path program 1 times [2021-11-25 20:22:12,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:12,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735079120] [2021-11-25 20:22:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:12,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:13,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735079120] [2021-11-25 20:22:13,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735079120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:13,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:13,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:22:13,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119630923] [2021-11-25 20:22:13,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:13,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:22:13,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:13,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:22:13,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:22:13,307 INFO L87 Difference]: Start difference. First operand has 426 states, 421 states have (on average 1.8598574821852731) internal successors, (783), 425 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 20:22:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:13,996 INFO L93 Difference]: Finished difference Result 712 states and 1257 transitions. [2021-11-25 20:22:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:22:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-25 20:22:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:14,025 INFO L225 Difference]: With dead ends: 712 [2021-11-25 20:22:14,025 INFO L226 Difference]: Without dead ends: 449 [2021-11-25 20:22:14,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:22:14,047 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 2119 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:14,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 551 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:22:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-25 20:22:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 443. [2021-11-25 20:22:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 439 states have (on average 1.3143507972665147) internal successors, (577), 442 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 20:22:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 577 transitions. [2021-11-25 20:22:14,162 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 577 transitions. Word has length 49 [2021-11-25 20:22:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:14,163 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 577 transitions. [2021-11-25 20:22:14,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 20:22:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 577 transitions. [2021-11-25 20:22:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:22:14,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:14,168 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] [2021-11-25 20:22:14,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:22:14,169 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:14,170 INFO L85 PathProgramCache]: Analyzing trace with hash 758566708, now seen corresponding path program 1 times [2021-11-25 20:22:14,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:14,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541530644] [2021-11-25 20:22:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:14,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:14,318 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 20:22:14,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541530644] [2021-11-25 20:22:14,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541530644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:14,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:14,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:14,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91758307] [2021-11-25 20:22:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:14,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:14,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:14,322 INFO L87 Difference]: Start difference. First operand 443 states and 577 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 20:22:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:14,414 INFO L93 Difference]: Finished difference Result 724 states and 978 transitions. [2021-11-25 20:22:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:14,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-25 20:22:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:14,419 INFO L225 Difference]: With dead ends: 724 [2021-11-25 20:22:14,419 INFO L226 Difference]: Without dead ends: 566 [2021-11-25 20:22:14,420 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 20:22:14,422 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 279 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:14,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 753 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-25 20:22:14,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 560. [2021-11-25 20:22:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 556 states have (on average 1.3435251798561152) internal successors, (747), 559 states have internal predecessors, (747), 0 states have call successors, (0), 0 states 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 20:22:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 747 transitions. [2021-11-25 20:22:14,455 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 747 transitions. Word has length 49 [2021-11-25 20:22:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:14,456 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 747 transitions. [2021-11-25 20:22:14,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 20:22:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 747 transitions. [2021-11-25 20:22:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:22:14,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:14,459 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] [2021-11-25 20:22:14,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:22:14,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:14,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1943064238, now seen corresponding path program 1 times [2021-11-25 20:22:14,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757522552] [2021-11-25 20:22:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:14,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:14,632 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 20:22:14,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:14,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757522552] [2021-11-25 20:22:14,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757522552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:14,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:14,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:14,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444762347] [2021-11-25 20:22:14,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:14,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:14,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:14,642 INFO L87 Difference]: Start difference. First operand 560 states and 747 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 20:22:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:14,768 INFO L93 Difference]: Finished difference Result 1072 states and 1473 transitions. [2021-11-25 20:22:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-25 20:22:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:14,774 INFO L225 Difference]: With dead ends: 1072 [2021-11-25 20:22:14,775 INFO L226 Difference]: Without dead ends: 810 [2021-11-25 20:22:14,776 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 20:22:14,780 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 236 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:14,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 786 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:22:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-11-25 20:22:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 803. [2021-11-25 20:22:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 799 states have (on average 1.360450563204005) internal successors, (1087), 802 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 20:22:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1087 transitions. [2021-11-25 20:22:14,843 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1087 transitions. Word has length 49 [2021-11-25 20:22:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:14,843 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1087 transitions. [2021-11-25 20:22:14,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 20:22:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1087 transitions. [2021-11-25 20:22:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:22:14,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:14,847 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] [2021-11-25 20:22:14,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:22:14,847 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:14,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1798780356, now seen corresponding path program 1 times [2021-11-25 20:22:14,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:14,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275048977] [2021-11-25 20:22:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:14,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:14,970 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 20:22:14,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:14,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275048977] [2021-11-25 20:22:14,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275048977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:14,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:14,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:22:14,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145521790] [2021-11-25 20:22:14,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:14,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:22:14,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:14,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:22:14,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:22:14,975 INFO L87 Difference]: Start difference. First operand 803 states and 1087 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 20:22:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:15,399 INFO L93 Difference]: Finished difference Result 1892 states and 2622 transitions. [2021-11-25 20:22:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:22:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-25 20:22:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:15,410 INFO L225 Difference]: With dead ends: 1892 [2021-11-25 20:22:15,410 INFO L226 Difference]: Without dead ends: 1184 [2021-11-25 20:22:15,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:22:15,423 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 1263 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:15,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1263 Valid, 318 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:22:15,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-11-25 20:22:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1178. [2021-11-25 20:22:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1174 states have (on average 1.374787052810903) internal successors, (1614), 1177 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states 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 20:22:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1614 transitions. [2021-11-25 20:22:15,543 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1614 transitions. Word has length 49 [2021-11-25 20:22:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:15,545 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1614 transitions. [2021-11-25 20:22:15,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 20:22:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1614 transitions. [2021-11-25 20:22:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:22:15,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:15,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:15,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:22:15,550 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash -108782984, now seen corresponding path program 1 times [2021-11-25 20:22:15,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:15,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806979904] [2021-11-25 20:22:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:15,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:15,654 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 20:22:15,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:15,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806979904] [2021-11-25 20:22:15,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806979904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:15,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:15,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:15,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987307749] [2021-11-25 20:22:15,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:15,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:15,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:15,657 INFO L87 Difference]: Start difference. First operand 1178 states and 1614 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:15,844 INFO L93 Difference]: Finished difference Result 2893 states and 3999 transitions. [2021-11-25 20:22:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-25 20:22:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:15,857 INFO L225 Difference]: With dead ends: 2893 [2021-11-25 20:22:15,857 INFO L226 Difference]: Without dead ends: 1899 [2021-11-25 20:22:15,860 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 20:22:15,861 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 276 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:15,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 720 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-11-25 20:22:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1893. [2021-11-25 20:22:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1889 states have (on average 1.3610375860243515) internal successors, (2571), 1892 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states 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 20:22:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2571 transitions. [2021-11-25 20:22:16,066 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2571 transitions. Word has length 50 [2021-11-25 20:22:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:16,067 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2571 transitions. [2021-11-25 20:22:16,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2571 transitions. [2021-11-25 20:22:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:22:16,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:16,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:16,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:22:16,073 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1856759737, now seen corresponding path program 1 times [2021-11-25 20:22:16,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:16,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071324760] [2021-11-25 20:22:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:16,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:16,167 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 20:22:16,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071324760] [2021-11-25 20:22:16,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071324760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:16,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:16,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:22:16,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268533960] [2021-11-25 20:22:16,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:16,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:22:16,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:16,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:22:16,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:22:16,170 INFO L87 Difference]: Start difference. First operand 1893 states and 2571 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:16,795 INFO L93 Difference]: Finished difference Result 4654 states and 6390 transitions. [2021-11-25 20:22:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:22:16,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-25 20:22:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:16,816 INFO L225 Difference]: With dead ends: 4654 [2021-11-25 20:22:16,816 INFO L226 Difference]: Without dead ends: 2931 [2021-11-25 20:22:16,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:22:16,821 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 1157 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:16,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 270 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:22:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2021-11-25 20:22:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2924. [2021-11-25 20:22:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2920 states have (on average 1.3623287671232878) internal successors, (3978), 2923 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states 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 20:22:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 3978 transitions. [2021-11-25 20:22:17,105 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 3978 transitions. Word has length 51 [2021-11-25 20:22:17,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:17,106 INFO L470 AbstractCegarLoop]: Abstraction has 2924 states and 3978 transitions. [2021-11-25 20:22:17,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:17,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 3978 transitions. [2021-11-25 20:22:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:22:17,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:17,109 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] [2021-11-25 20:22:17,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:22:17,110 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1124331061, now seen corresponding path program 1 times [2021-11-25 20:22:17,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:17,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172685835] [2021-11-25 20:22:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:17,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:17,210 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 20:22:17,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172685835] [2021-11-25 20:22:17,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172685835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:17,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:17,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:22:17,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676219993] [2021-11-25 20:22:17,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:17,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:22:17,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:17,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:22:17,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:22:17,214 INFO L87 Difference]: Start difference. First operand 2924 states and 3978 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 20:22:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:18,461 INFO L93 Difference]: Finished difference Result 9735 states and 13404 transitions. [2021-11-25 20:22:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:22:18,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-25 20:22:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:18,514 INFO L225 Difference]: With dead ends: 9735 [2021-11-25 20:22:18,514 INFO L226 Difference]: Without dead ends: 8640 [2021-11-25 20:22:18,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:22:18,520 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 2194 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:18,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2194 Valid, 505 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:22:18,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8640 states. [2021-11-25 20:22:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8640 to 2938. [2021-11-25 20:22:18,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2934 states have (on average 1.361963190184049) internal successors, (3996), 2937 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states 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 20:22:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 3996 transitions. [2021-11-25 20:22:18,946 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 3996 transitions. Word has length 52 [2021-11-25 20:22:18,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:18,947 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 3996 transitions. [2021-11-25 20:22:18,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 20:22:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 3996 transitions. [2021-11-25 20:22:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:22:18,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:18,950 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] [2021-11-25 20:22:18,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:22:18,951 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1221262858, now seen corresponding path program 1 times [2021-11-25 20:22:18,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:18,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372527527] [2021-11-25 20:22:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:18,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:19,038 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 20:22:19,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:19,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372527527] [2021-11-25 20:22:19,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372527527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:19,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:19,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:22:19,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741608491] [2021-11-25 20:22:19,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:19,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:22:19,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:22:19,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:22:19,041 INFO L87 Difference]: Start difference. First operand 2938 states and 3996 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 20:22:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:20,624 INFO L93 Difference]: Finished difference Result 10791 states and 14940 transitions. [2021-11-25 20:22:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:22:20,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-25 20:22:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:20,687 INFO L225 Difference]: With dead ends: 10791 [2021-11-25 20:22:20,687 INFO L226 Difference]: Without dead ends: 9851 [2021-11-25 20:22:20,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:22:20,692 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 1680 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:20,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1680 Valid, 598 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:22:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9851 states. [2021-11-25 20:22:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9851 to 2960. [2021-11-25 20:22:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2956 states have (on average 1.3623139377537212) internal successors, (4027), 2959 states have internal predecessors, (4027), 0 states have call successors, (0), 0 states 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 20:22:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 4027 transitions. [2021-11-25 20:22:21,187 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 4027 transitions. Word has length 52 [2021-11-25 20:22:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:21,188 INFO L470 AbstractCegarLoop]: Abstraction has 2960 states and 4027 transitions. [2021-11-25 20:22:21,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 20:22:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 4027 transitions. [2021-11-25 20:22:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:22:21,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:21,192 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] [2021-11-25 20:22:21,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:22:21,192 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:21,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:21,193 INFO L85 PathProgramCache]: Analyzing trace with hash -163415276, now seen corresponding path program 1 times [2021-11-25 20:22:21,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:21,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484528256] [2021-11-25 20:22:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:21,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:21,310 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 20:22:21,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:21,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484528256] [2021-11-25 20:22:21,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484528256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:21,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:21,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:22:21,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752259686] [2021-11-25 20:22:21,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:21,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:22:21,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:22:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:22:21,313 INFO L87 Difference]: Start difference. First operand 2960 states and 4027 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 20:22:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:23,376 INFO L93 Difference]: Finished difference Result 12802 states and 17753 transitions. [2021-11-25 20:22:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:22:23,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-25 20:22:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:23,416 INFO L225 Difference]: With dead ends: 12802 [2021-11-25 20:22:23,417 INFO L226 Difference]: Without dead ends: 11748 [2021-11-25 20:22:23,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:22:23,423 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 2505 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2505 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:23,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2505 Valid, 538 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:22:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11748 states. [2021-11-25 20:22:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11748 to 2994. [2021-11-25 20:22:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2990 states have (on average 1.3615384615384616) internal successors, (4071), 2993 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states 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 20:22:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 4071 transitions. [2021-11-25 20:22:23,950 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 4071 transitions. Word has length 52 [2021-11-25 20:22:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:23,950 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 4071 transitions. [2021-11-25 20:22:23,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 20:22:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 4071 transitions. [2021-11-25 20:22:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:22:23,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:23,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:23,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:22:23,955 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:23,955 INFO L85 PathProgramCache]: Analyzing trace with hash -55106621, now seen corresponding path program 1 times [2021-11-25 20:22:23,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:23,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276618255] [2021-11-25 20:22:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:23,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:24,070 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 20:22:24,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:24,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276618255] [2021-11-25 20:22:24,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276618255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:24,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:24,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:22:24,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928338644] [2021-11-25 20:22:24,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:24,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:22:24,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:22:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:22:24,073 INFO L87 Difference]: Start difference. First operand 2994 states and 4071 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:25,210 INFO L93 Difference]: Finished difference Result 7046 states and 9705 transitions. [2021-11-25 20:22:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:22:25,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-25 20:22:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:25,220 INFO L225 Difference]: With dead ends: 7046 [2021-11-25 20:22:25,220 INFO L226 Difference]: Without dead ends: 5014 [2021-11-25 20:22:25,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:22:25,226 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1474 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:25,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1474 Valid, 726 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:22:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2021-11-25 20:22:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 2916. [2021-11-25 20:22:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2912 states have (on average 1.3602335164835164) internal successors, (3961), 2915 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states 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 20:22:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 3961 transitions. [2021-11-25 20:22:25,628 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 3961 transitions. Word has length 53 [2021-11-25 20:22:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:25,628 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 3961 transitions. [2021-11-25 20:22:25,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 3961 transitions. [2021-11-25 20:22:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:22:25,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:25,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:25,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:22:25,632 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1129390909, now seen corresponding path program 1 times [2021-11-25 20:22:25,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:25,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112157096] [2021-11-25 20:22:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:25,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:25,749 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 20:22:25,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:25,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112157096] [2021-11-25 20:22:25,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112157096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:25,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:25,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:22:25,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179660271] [2021-11-25 20:22:25,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:25,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:22:25,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:25,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:22:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:22:25,752 INFO L87 Difference]: Start difference. First operand 2916 states and 3961 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:27,462 INFO L93 Difference]: Finished difference Result 7995 states and 10964 transitions. [2021-11-25 20:22:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:22:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-25 20:22:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:27,477 INFO L225 Difference]: With dead ends: 7995 [2021-11-25 20:22:27,477 INFO L226 Difference]: Without dead ends: 6093 [2021-11-25 20:22:27,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:22:27,483 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 871 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:27,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 1277 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:22:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6093 states. [2021-11-25 20:22:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6093 to 2887. [2021-11-25 20:22:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2883 states have (on average 1.3596947624002775) internal successors, (3920), 2886 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states 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 20:22:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3920 transitions. [2021-11-25 20:22:27,975 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3920 transitions. Word has length 53 [2021-11-25 20:22:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:27,976 INFO L470 AbstractCegarLoop]: Abstraction has 2887 states and 3920 transitions. [2021-11-25 20:22:27,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3920 transitions. [2021-11-25 20:22:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:22:27,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:27,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:27,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:22:27,981 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:27,981 INFO L85 PathProgramCache]: Analyzing trace with hash -421230622, now seen corresponding path program 1 times [2021-11-25 20:22:27,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:27,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85895090] [2021-11-25 20:22:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:27,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:28,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:28,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85895090] [2021-11-25 20:22:28,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85895090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:28,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:28,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:22:28,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249704809] [2021-11-25 20:22:28,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:28,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:22:28,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:22:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:22:28,121 INFO L87 Difference]: Start difference. First operand 2887 states and 3920 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:29,769 INFO L93 Difference]: Finished difference Result 6005 states and 8183 transitions. [2021-11-25 20:22:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:22:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-25 20:22:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:29,782 INFO L225 Difference]: With dead ends: 6005 [2021-11-25 20:22:29,783 INFO L226 Difference]: Without dead ends: 6000 [2021-11-25 20:22:29,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:22:29,786 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 1333 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:29,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1333 Valid, 1057 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:22:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2021-11-25 20:22:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 2887. [2021-11-25 20:22:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2883 states have (on average 1.3590010405827264) internal successors, (3918), 2886 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states 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 20:22:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3918 transitions. [2021-11-25 20:22:30,243 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3918 transitions. Word has length 53 [2021-11-25 20:22:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:30,244 INFO L470 AbstractCegarLoop]: Abstraction has 2887 states and 3918 transitions. [2021-11-25 20:22:30,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3918 transitions. [2021-11-25 20:22:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:22:30,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:30,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:30,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:22:30,248 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:30,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1237294753, now seen corresponding path program 1 times [2021-11-25 20:22:30,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:30,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684587908] [2021-11-25 20:22:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:30,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:30,290 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 20:22:30,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:30,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684587908] [2021-11-25 20:22:30,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684587908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:30,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:30,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:30,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413310511] [2021-11-25 20:22:30,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:30,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:30,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:30,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:30,293 INFO L87 Difference]: Start difference. First operand 2887 states and 3918 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:30,703 INFO L93 Difference]: Finished difference Result 3946 states and 5380 transitions. [2021-11-25 20:22:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:30,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 20:22:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:30,709 INFO L225 Difference]: With dead ends: 3946 [2021-11-25 20:22:30,709 INFO L226 Difference]: Without dead ends: 2894 [2021-11-25 20:22:30,712 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 20:22:30,713 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 180 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:30,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 671 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-11-25 20:22:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2887. [2021-11-25 20:22:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2883 states have (on average 1.3423517169614985) internal successors, (3870), 2886 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states 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 20:22:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3870 transitions. [2021-11-25 20:22:31,277 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3870 transitions. Word has length 54 [2021-11-25 20:22:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:31,277 INFO L470 AbstractCegarLoop]: Abstraction has 2887 states and 3870 transitions. [2021-11-25 20:22:31,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3870 transitions. [2021-11-25 20:22:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:22:31,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:31,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:31,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:22:31,284 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:31,285 INFO L85 PathProgramCache]: Analyzing trace with hash -863697757, now seen corresponding path program 1 times [2021-11-25 20:22:31,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:31,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456844775] [2021-11-25 20:22:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:31,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:31,355 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 20:22:31,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:31,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456844775] [2021-11-25 20:22:31,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456844775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:31,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:31,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:31,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270293878] [2021-11-25 20:22:31,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:31,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:31,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:31,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:31,360 INFO L87 Difference]: Start difference. First operand 2887 states and 3870 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:31,880 INFO L93 Difference]: Finished difference Result 4007 states and 5396 transitions. [2021-11-25 20:22:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:31,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 20:22:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:31,885 INFO L225 Difference]: With dead ends: 4007 [2021-11-25 20:22:31,885 INFO L226 Difference]: Without dead ends: 2893 [2021-11-25 20:22:31,888 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 20:22:31,889 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 196 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:31,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 672 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-11-25 20:22:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2887. [2021-11-25 20:22:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2883 states have (on average 1.327089836975373) internal successors, (3826), 2886 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states 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 20:22:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3826 transitions. [2021-11-25 20:22:32,497 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3826 transitions. Word has length 54 [2021-11-25 20:22:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:32,497 INFO L470 AbstractCegarLoop]: Abstraction has 2887 states and 3826 transitions. [2021-11-25 20:22:32,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:32,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3826 transitions. [2021-11-25 20:22:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:22:32,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:32,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:32,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:22:32,503 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:32,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:32,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1589153365, now seen corresponding path program 1 times [2021-11-25 20:22:32,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:32,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491450360] [2021-11-25 20:22:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:32,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:32,551 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 20:22:32,552 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:32,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491450360] [2021-11-25 20:22:32,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491450360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:32,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:32,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:32,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613353392] [2021-11-25 20:22:32,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:32,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:32,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:32,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:32,555 INFO L87 Difference]: Start difference. First operand 2887 states and 3826 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:32,992 INFO L93 Difference]: Finished difference Result 4036 states and 5379 transitions. [2021-11-25 20:22:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:32,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 20:22:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:32,996 INFO L225 Difference]: With dead ends: 4036 [2021-11-25 20:22:32,996 INFO L226 Difference]: Without dead ends: 2878 [2021-11-25 20:22:33,002 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 20:22:33,003 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 216 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:33,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 692 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2021-11-25 20:22:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2872. [2021-11-25 20:22:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2868 states have (on average 1.306834030683403) internal successors, (3748), 2871 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states 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 20:22:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 3748 transitions. [2021-11-25 20:22:33,390 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 3748 transitions. Word has length 54 [2021-11-25 20:22:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:33,391 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 3748 transitions. [2021-11-25 20:22:33,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 3748 transitions. [2021-11-25 20:22:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 20:22:33,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:33,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:33,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:22:33,396 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1127796312, now seen corresponding path program 1 times [2021-11-25 20:22:33,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:33,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216975709] [2021-11-25 20:22:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:33,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:33,441 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 20:22:33,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:33,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216975709] [2021-11-25 20:22:33,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216975709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:33,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:33,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:33,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522131785] [2021-11-25 20:22:33,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:33,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:33,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:33,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:33,445 INFO L87 Difference]: Start difference. First operand 2872 states and 3748 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:34,211 INFO L93 Difference]: Finished difference Result 4519 states and 5947 transitions. [2021-11-25 20:22:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:34,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-25 20:22:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:34,217 INFO L225 Difference]: With dead ends: 4519 [2021-11-25 20:22:34,218 INFO L226 Difference]: Without dead ends: 3218 [2021-11-25 20:22:34,221 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 20:22:34,222 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 282 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:34,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 476 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:22:34,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2021-11-25 20:22:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2662. [2021-11-25 20:22:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2658 states have (on average 1.3054928517682467) internal successors, (3470), 2661 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states 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 20:22:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3470 transitions. [2021-11-25 20:22:34,651 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3470 transitions. Word has length 55 [2021-11-25 20:22:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:34,652 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 3470 transitions. [2021-11-25 20:22:34,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3470 transitions. [2021-11-25 20:22:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:22:34,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:34,656 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] [2021-11-25 20:22:34,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:22:34,656 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:34,657 INFO L85 PathProgramCache]: Analyzing trace with hash 847139516, now seen corresponding path program 1 times [2021-11-25 20:22:34,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:34,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121566282] [2021-11-25 20:22:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:34,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:34,702 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 20:22:34,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121566282] [2021-11-25 20:22:34,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121566282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:34,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:34,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:34,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89847378] [2021-11-25 20:22:34,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:34,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:34,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:34,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:34,705 INFO L87 Difference]: Start difference. First operand 2662 states and 3470 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 20:22:35,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:35,351 INFO L93 Difference]: Finished difference Result 4438 states and 5797 transitions. [2021-11-25 20:22:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:35,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-25 20:22:35,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:35,356 INFO L225 Difference]: With dead ends: 4438 [2021-11-25 20:22:35,356 INFO L226 Difference]: Without dead ends: 3077 [2021-11-25 20:22:35,358 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 20:22:35,359 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 255 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:35,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 376 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:22:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-11-25 20:22:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2510. [2021-11-25 20:22:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2506 states have (on average 1.3048683160415004) internal successors, (3270), 2509 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states 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 20:22:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 3270 transitions. [2021-11-25 20:22:35,688 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 3270 transitions. Word has length 56 [2021-11-25 20:22:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:35,689 INFO L470 AbstractCegarLoop]: Abstraction has 2510 states and 3270 transitions. [2021-11-25 20:22:35,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 20:22:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 3270 transitions. [2021-11-25 20:22:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:22:35,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:35,692 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] [2021-11-25 20:22:35,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:22:35,692 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:35,693 INFO L85 PathProgramCache]: Analyzing trace with hash 474120695, now seen corresponding path program 1 times [2021-11-25 20:22:35,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:35,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083752239] [2021-11-25 20:22:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:35,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:35,994 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 20:22:35,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083752239] [2021-11-25 20:22:35,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083752239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:35,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:35,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 20:22:35,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962605287] [2021-11-25 20:22:35,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:35,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:22:35,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:35,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:22:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:22:35,996 INFO L87 Difference]: Start difference. First operand 2510 states and 3270 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 20:22:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:37,593 INFO L93 Difference]: Finished difference Result 3952 states and 5163 transitions. [2021-11-25 20:22:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:22:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-25 20:22:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:37,598 INFO L225 Difference]: With dead ends: 3952 [2021-11-25 20:22:37,598 INFO L226 Difference]: Without dead ends: 3948 [2021-11-25 20:22:37,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:22:37,600 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 1499 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:37,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 2216 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:22:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-11-25 20:22:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2506. [2021-11-25 20:22:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2503 states have (on average 1.3044346783859369) internal successors, (3265), 2505 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states 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 20:22:37,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3265 transitions. [2021-11-25 20:22:37,971 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3265 transitions. Word has length 56 [2021-11-25 20:22:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:37,971 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 3265 transitions. [2021-11-25 20:22:37,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 20:22:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3265 transitions. [2021-11-25 20:22:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:22:37,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:37,974 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] [2021-11-25 20:22:37,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:22:37,974 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1321631968, now seen corresponding path program 1 times [2021-11-25 20:22:37,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:37,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298569077] [2021-11-25 20:22:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:37,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:38,243 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 20:22:38,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:38,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298569077] [2021-11-25 20:22:38,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298569077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:38,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:38,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:22:38,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533904690] [2021-11-25 20:22:38,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:38,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:22:38,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:38,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:22:38,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:22:38,246 INFO L87 Difference]: Start difference. First operand 2506 states and 3265 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 20:22:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:39,759 INFO L93 Difference]: Finished difference Result 4195 states and 5490 transitions. [2021-11-25 20:22:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:22:39,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-25 20:22:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:39,764 INFO L225 Difference]: With dead ends: 4195 [2021-11-25 20:22:39,764 INFO L226 Difference]: Without dead ends: 3697 [2021-11-25 20:22:39,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:22:39,766 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 1520 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:39,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1639 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:22:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2021-11-25 20:22:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 2443. [2021-11-25 20:22:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 1.305896805896806) internal successors, (3189), 2442 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states 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 20:22:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3189 transitions. [2021-11-25 20:22:40,179 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3189 transitions. Word has length 56 [2021-11-25 20:22:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:40,180 INFO L470 AbstractCegarLoop]: Abstraction has 2443 states and 3189 transitions. [2021-11-25 20:22:40,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 20:22:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3189 transitions. [2021-11-25 20:22:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:22:40,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:40,183 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] [2021-11-25 20:22:40,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:22:40,184 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:40,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1785037930, now seen corresponding path program 1 times [2021-11-25 20:22:40,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:40,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142814746] [2021-11-25 20:22:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:40,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:40,249 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 20:22:40,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:40,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142814746] [2021-11-25 20:22:40,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142814746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:40,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:40,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:22:40,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134055803] [2021-11-25 20:22:40,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:40,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:22:40,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:40,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:22:40,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:22:40,252 INFO L87 Difference]: Start difference. First operand 2443 states and 3189 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 20:22:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:40,760 INFO L93 Difference]: Finished difference Result 2449 states and 3192 transitions. [2021-11-25 20:22:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:22:40,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-25 20:22:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:40,763 INFO L225 Difference]: With dead ends: 2449 [2021-11-25 20:22:40,763 INFO L226 Difference]: Without dead ends: 2122 [2021-11-25 20:22:40,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:22:40,767 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 452 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:40,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 661 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:22:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-11-25 20:22:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2118. [2021-11-25 20:22:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 2117 states have (on average 1.3032593292394898) internal successors, (2759), 2117 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states 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 20:22:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2759 transitions. [2021-11-25 20:22:41,139 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2759 transitions. Word has length 56 [2021-11-25 20:22:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:41,139 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 2759 transitions. [2021-11-25 20:22:41,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 20:22:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2759 transitions. [2021-11-25 20:22:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 20:22:41,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:41,141 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] [2021-11-25 20:22:41,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 20:22:41,141 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash -106059015, now seen corresponding path program 1 times [2021-11-25 20:22:41,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:41,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839808906] [2021-11-25 20:22:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:41,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:41,188 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 20:22:41,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:41,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839808906] [2021-11-25 20:22:41,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839808906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:41,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:41,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:41,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932279423] [2021-11-25 20:22:41,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:41,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:41,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:41,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:41,190 INFO L87 Difference]: Start difference. First operand 2118 states and 2759 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:41,772 INFO L93 Difference]: Finished difference Result 3890 states and 5169 transitions. [2021-11-25 20:22:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:41,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-25 20:22:41,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:41,775 INFO L225 Difference]: With dead ends: 3890 [2021-11-25 20:22:41,775 INFO L226 Difference]: Without dead ends: 2872 [2021-11-25 20:22:41,776 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 20:22:41,777 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 111 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:41,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 465 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-11-25 20:22:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2678. [2021-11-25 20:22:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 1.2977213298468435) internal successors, (3474), 2677 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states 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 20:22:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3474 transitions. [2021-11-25 20:22:42,246 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3474 transitions. Word has length 57 [2021-11-25 20:22:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:42,246 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3474 transitions. [2021-11-25 20:22:42,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3474 transitions. [2021-11-25 20:22:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 20:22:42,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:42,249 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] [2021-11-25 20:22:42,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 20:22:42,250 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash 540593195, now seen corresponding path program 1 times [2021-11-25 20:22:42,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:42,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538393433] [2021-11-25 20:22:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:42,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:42,304 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 20:22:42,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:42,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538393433] [2021-11-25 20:22:42,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538393433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:42,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:42,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:42,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707456838] [2021-11-25 20:22:42,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:42,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:42,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:42,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:42,307 INFO L87 Difference]: Start difference. First operand 2678 states and 3474 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:43,157 INFO L93 Difference]: Finished difference Result 5292 states and 7003 transitions. [2021-11-25 20:22:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-25 20:22:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:43,163 INFO L225 Difference]: With dead ends: 5292 [2021-11-25 20:22:43,163 INFO L226 Difference]: Without dead ends: 3854 [2021-11-25 20:22:43,165 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 20:22:43,166 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 99 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:43,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 453 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-11-25 20:22:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3444. [2021-11-25 20:22:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3443 states have (on average 1.2945106012198664) internal successors, (4457), 3443 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states 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 20:22:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 4457 transitions. [2021-11-25 20:22:44,017 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 4457 transitions. Word has length 60 [2021-11-25 20:22:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:44,018 INFO L470 AbstractCegarLoop]: Abstraction has 3444 states and 4457 transitions. [2021-11-25 20:22:44,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 4457 transitions. [2021-11-25 20:22:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 20:22:44,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:44,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:44,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 20:22:44,021 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1345830140, now seen corresponding path program 1 times [2021-11-25 20:22:44,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:44,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861886340] [2021-11-25 20:22:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:44,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:44,115 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 20:22:44,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861886340] [2021-11-25 20:22:44,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861886340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:44,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:44,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:44,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829525698] [2021-11-25 20:22:44,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:44,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:44,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:44,118 INFO L87 Difference]: Start difference. First operand 3444 states and 4457 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:45,511 INFO L93 Difference]: Finished difference Result 7086 states and 9331 transitions. [2021-11-25 20:22:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-25 20:22:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:45,518 INFO L225 Difference]: With dead ends: 7086 [2021-11-25 20:22:45,519 INFO L226 Difference]: Without dead ends: 5158 [2021-11-25 20:22:45,522 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 20:22:45,523 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 77 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:45,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 443 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-11-25 20:22:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4636. [2021-11-25 20:22:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 1.2897518878101402) internal successors, (5978), 4635 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states 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 20:22:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 5978 transitions. [2021-11-25 20:22:46,494 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 5978 transitions. Word has length 64 [2021-11-25 20:22:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:46,494 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 5978 transitions. [2021-11-25 20:22:46,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 5978 transitions. [2021-11-25 20:22:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 20:22:46,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:46,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:46,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 20:22:46,497 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:46,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1004351148, now seen corresponding path program 1 times [2021-11-25 20:22:46,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:46,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21086737] [2021-11-25 20:22:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:46,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:46,623 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 20:22:46,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21086737] [2021-11-25 20:22:46,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21086737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:46,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:46,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:22:46,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055017982] [2021-11-25 20:22:46,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:46,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:22:46,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:22:46,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:22:46,626 INFO L87 Difference]: Start difference. First operand 4636 states and 5978 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:49,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:49,261 INFO L93 Difference]: Finished difference Result 9802 states and 12706 transitions. [2021-11-25 20:22:49,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:22:49,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-25 20:22:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:49,273 INFO L225 Difference]: With dead ends: 9802 [2021-11-25 20:22:49,273 INFO L226 Difference]: Without dead ends: 9800 [2021-11-25 20:22:49,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:22:49,276 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 1263 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:49,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1263 Valid, 1480 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:22:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9800 states. [2021-11-25 20:22:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9800 to 5688. [2021-11-25 20:22:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5688 states, 5687 states have (on average 1.285036047125022) internal successors, (7308), 5687 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states 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 20:22:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5688 states to 5688 states and 7308 transitions. [2021-11-25 20:22:50,717 INFO L78 Accepts]: Start accepts. Automaton has 5688 states and 7308 transitions. Word has length 68 [2021-11-25 20:22:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:50,718 INFO L470 AbstractCegarLoop]: Abstraction has 5688 states and 7308 transitions. [2021-11-25 20:22:50,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5688 states and 7308 transitions. [2021-11-25 20:22:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:22:50,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:50,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:50,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 20:22:50,721 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1467687864, now seen corresponding path program 1 times [2021-11-25 20:22:50,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:50,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013857975] [2021-11-25 20:22:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:50,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:50,806 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 20:22:50,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:50,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013857975] [2021-11-25 20:22:50,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013857975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:50,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:50,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:22:50,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608252155] [2021-11-25 20:22:50,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:50,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:22:50,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:22:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:22:50,810 INFO L87 Difference]: Start difference. First operand 5688 states and 7308 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:55,543 INFO L93 Difference]: Finished difference Result 17122 states and 22104 transitions. [2021-11-25 20:22:55,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:22:55,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-25 20:22:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:55,564 INFO L225 Difference]: With dead ends: 17122 [2021-11-25 20:22:55,564 INFO L226 Difference]: Without dead ends: 15482 [2021-11-25 20:22:55,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:22:55,569 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 1756 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:55,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1756 Valid, 427 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:22:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15482 states. [2021-11-25 20:22:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15482 to 5750. [2021-11-25 20:22:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 1.283701513306662) internal successors, (7380), 5749 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states 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 20:22:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 7380 transitions. [2021-11-25 20:22:57,059 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 7380 transitions. Word has length 71 [2021-11-25 20:22:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:57,060 INFO L470 AbstractCegarLoop]: Abstraction has 5750 states and 7380 transitions. [2021-11-25 20:22:57,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 7380 transitions. [2021-11-25 20:22:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:22:57,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:57,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:57,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 20:22:57,065 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:22:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:57,065 INFO L85 PathProgramCache]: Analyzing trace with hash 311172158, now seen corresponding path program 1 times [2021-11-25 20:22:57,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:57,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936990175] [2021-11-25 20:22:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:57,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:57,203 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 20:22:57,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:57,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936990175] [2021-11-25 20:22:57,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936990175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:57,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:57,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:22:57,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048319274] [2021-11-25 20:22:57,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:57,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:22:57,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:57,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:22:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:22:57,206 INFO L87 Difference]: Start difference. First operand 5750 states and 7380 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:00,035 INFO L93 Difference]: Finished difference Result 9734 states and 12622 transitions. [2021-11-25 20:23:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:23:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-25 20:23:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:00,048 INFO L225 Difference]: With dead ends: 9734 [2021-11-25 20:23:00,048 INFO L226 Difference]: Without dead ends: 9732 [2021-11-25 20:23:00,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:23:00,052 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 894 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:00,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 1829 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:23:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2021-11-25 20:23:01,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 6222. [2021-11-25 20:23:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 1.2821089856936183) internal successors, (7976), 6221 states have internal predecessors, (7976), 0 states have call successors, (0), 0 states 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 20:23:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 7976 transitions. [2021-11-25 20:23:01,712 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 7976 transitions. Word has length 73 [2021-11-25 20:23:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:01,713 INFO L470 AbstractCegarLoop]: Abstraction has 6222 states and 7976 transitions. [2021-11-25 20:23:01,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 7976 transitions. [2021-11-25 20:23:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:23:01,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:01,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:01,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 20:23:01,718 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:23:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash 675998173, now seen corresponding path program 1 times [2021-11-25 20:23:01,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383487473] [2021-11-25 20:23:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:01,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:01,756 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 20:23:01,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383487473] [2021-11-25 20:23:01,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383487473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:01,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:01,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:23:01,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773427693] [2021-11-25 20:23:01,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:01,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:23:01,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:23:01,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:23:01,759 INFO L87 Difference]: Start difference. First operand 6222 states and 7976 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:03,729 INFO L93 Difference]: Finished difference Result 9240 states and 11875 transitions. [2021-11-25 20:23:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:23:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-25 20:23:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:03,738 INFO L225 Difference]: With dead ends: 9240 [2021-11-25 20:23:03,738 INFO L226 Difference]: Without dead ends: 6550 [2021-11-25 20:23:03,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:23:03,742 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 182 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:03,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 296 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:23:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6550 states. [2021-11-25 20:23:05,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6550 to 5806. [2021-11-25 20:23:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5806 states, 5805 states have (on average 1.2776916451335056) internal successors, (7417), 5805 states have internal predecessors, (7417), 0 states have call successors, (0), 0 states 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 20:23:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 7417 transitions. [2021-11-25 20:23:05,224 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 7417 transitions. Word has length 74 [2021-11-25 20:23:05,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:05,224 INFO L470 AbstractCegarLoop]: Abstraction has 5806 states and 7417 transitions. [2021-11-25 20:23:05,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 7417 transitions. [2021-11-25 20:23:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:23:05,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:05,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:05,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 20:23:05,227 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:23:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:05,228 INFO L85 PathProgramCache]: Analyzing trace with hash 444966956, now seen corresponding path program 1 times [2021-11-25 20:23:05,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:05,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425318239] [2021-11-25 20:23:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:05,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:05,376 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 20:23:05,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:05,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425318239] [2021-11-25 20:23:05,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425318239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:05,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:05,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:23:05,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950810840] [2021-11-25 20:23:05,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:05,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:23:05,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:05,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:23:05,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:23:05,379 INFO L87 Difference]: Start difference. First operand 5806 states and 7417 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:08,260 INFO L93 Difference]: Finished difference Result 9204 states and 11884 transitions. [2021-11-25 20:23:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:23:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-25 20:23:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:08,272 INFO L225 Difference]: With dead ends: 9204 [2021-11-25 20:23:08,272 INFO L226 Difference]: Without dead ends: 9202 [2021-11-25 20:23:08,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:23:08,276 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 838 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:08,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 1502 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-11-25 20:23:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6062. [2021-11-25 20:23:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6062 states, 6061 states have (on average 1.2770169938953968) internal successors, (7740), 6061 states have internal predecessors, (7740), 0 states have call successors, (0), 0 states 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 20:23:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6062 states to 6062 states and 7740 transitions. [2021-11-25 20:23:09,951 INFO L78 Accepts]: Start accepts. Automaton has 6062 states and 7740 transitions. Word has length 74 [2021-11-25 20:23:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:09,952 INFO L470 AbstractCegarLoop]: Abstraction has 6062 states and 7740 transitions. [2021-11-25 20:23:09,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 6062 states and 7740 transitions. [2021-11-25 20:23:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:23:09,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:09,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:09,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 20:23:09,956 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:23:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash 425928445, now seen corresponding path program 1 times [2021-11-25 20:23:09,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:09,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367110278] [2021-11-25 20:23:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:09,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:23:10,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:10,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367110278] [2021-11-25 20:23:10,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367110278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:10,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:10,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:23:10,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136676780] [2021-11-25 20:23:10,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:10,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:23:10,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:10,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:23:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:23:10,084 INFO L87 Difference]: Start difference. First operand 6062 states and 7740 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:13,261 INFO L93 Difference]: Finished difference Result 11626 states and 14804 transitions. [2021-11-25 20:23:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:23:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 20:23:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:13,272 INFO L225 Difference]: With dead ends: 11626 [2021-11-25 20:23:13,272 INFO L226 Difference]: Without dead ends: 8800 [2021-11-25 20:23:13,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:23:13,276 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 747 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:13,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 750 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:23:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8800 states. [2021-11-25 20:23:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8800 to 5944. [2021-11-25 20:23:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5944 states, 5943 states have (on average 1.2789836782769646) internal successors, (7601), 5943 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states 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 20:23:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5944 states to 5944 states and 7601 transitions. [2021-11-25 20:23:14,831 INFO L78 Accepts]: Start accepts. Automaton has 5944 states and 7601 transitions. Word has length 76 [2021-11-25 20:23:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:14,832 INFO L470 AbstractCegarLoop]: Abstraction has 5944 states and 7601 transitions. [2021-11-25 20:23:14,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 5944 states and 7601 transitions. [2021-11-25 20:23:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:23:14,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:14,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:14,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-25 20:23:14,835 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:23:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 959582828, now seen corresponding path program 1 times [2021-11-25 20:23:14,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:14,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614025064] [2021-11-25 20:23:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:14,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:23:14,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:14,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614025064] [2021-11-25 20:23:14,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614025064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:14,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:14,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:23:14,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038970530] [2021-11-25 20:23:14,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:14,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:23:14,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:23:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:23:14,956 INFO L87 Difference]: Start difference. First operand 5944 states and 7601 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:18,357 INFO L93 Difference]: Finished difference Result 12433 states and 15884 transitions. [2021-11-25 20:23:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:23:18,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 20:23:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:18,370 INFO L225 Difference]: With dead ends: 12433 [2021-11-25 20:23:18,370 INFO L226 Difference]: Without dead ends: 10013 [2021-11-25 20:23:18,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:23:18,377 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 1046 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:18,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 735 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:23:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10013 states. [2021-11-25 20:23:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10013 to 5858. [2021-11-25 20:23:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5858 states, 5857 states have (on average 1.2801775653064709) internal successors, (7498), 5857 states have internal predecessors, (7498), 0 states have call successors, (0), 0 states 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 20:23:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5858 states to 5858 states and 7498 transitions. [2021-11-25 20:23:20,117 INFO L78 Accepts]: Start accepts. Automaton has 5858 states and 7498 transitions. Word has length 76 [2021-11-25 20:23:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:20,117 INFO L470 AbstractCegarLoop]: Abstraction has 5858 states and 7498 transitions. [2021-11-25 20:23:20,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 5858 states and 7498 transitions. [2021-11-25 20:23:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:23:20,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:20,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:20,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-25 20:23:20,121 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:23:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1357844593, now seen corresponding path program 1 times [2021-11-25 20:23:20,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:20,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779790649] [2021-11-25 20:23:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:20,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:23:20,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:20,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779790649] [2021-11-25 20:23:20,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779790649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:20,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596733513] [2021-11-25 20:23:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:20,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:20,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:20,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:23:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:20,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-25 20:23:20,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:23:28,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:23:46,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596733513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:23:46,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296574346] [2021-11-25 20:23:46,249 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2021-11-25 20:23:46,250 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:46,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:46,261 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:46,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:23:46,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:46,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:46,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:23:46,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:46,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:46,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:46,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:23:51,068 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:24:54,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [296574346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:24:54,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:24:54,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [16, 26, 26] total 105 [2021-11-25 20:24:54,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805232996] [2021-11-25 20:24:54,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:24:54,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 20:24:54,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:24:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 20:24:54,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=8953, Unknown=0, NotChecked=0, Total=10920 [2021-11-25 20:24:54,747 INFO L87 Difference]: Start difference. First operand 5858 states and 7498 transitions. Second operand has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:25:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:25:06,988 INFO L93 Difference]: Finished difference Result 6420 states and 8235 transitions. [2021-11-25 20:25:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-25 20:25:06,989 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-25 20:25:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:25:06,995 INFO L225 Difference]: With dead ends: 6420 [2021-11-25 20:25:06,996 INFO L226 Difference]: Without dead ends: 5614 [2021-11-25 20:25:07,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 132 SyntacticMatches, 12 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6144 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=1967, Invalid=8953, Unknown=0, NotChecked=0, Total=10920 [2021-11-25 20:25:07,005 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 80 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 4501 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 4507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:25:07,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 522 Invalid, 4507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4501 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2021-11-25 20:25:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2021-11-25 20:25:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 5614. [2021-11-25 20:25:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5614 states, 5613 states have (on average 1.279885978977374) internal successors, (7184), 5613 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states 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 20:25:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 7184 transitions. [2021-11-25 20:25:08,913 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 7184 transitions. Word has length 77 [2021-11-25 20:25:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:25:08,913 INFO L470 AbstractCegarLoop]: Abstraction has 5614 states and 7184 transitions. [2021-11-25 20:25:08,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:25:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 7184 transitions. [2021-11-25 20:25:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:25:08,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:25:08,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:25:08,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:25:09,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-25 20:25:09,133 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:25:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:25:09,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1951621714, now seen corresponding path program 1 times [2021-11-25 20:25:09,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:25:09,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712517408] [2021-11-25 20:25:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:25:09,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:25:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:25:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:25:09,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:25:09,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712517408] [2021-11-25 20:25:09,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712517408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:25:09,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482846088] [2021-11-25 20:25:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:25:09,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:25:09,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:25:09,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:25:09,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:25:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:25:09,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-25 20:25:09,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:25:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:25:15,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:26:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:26:02,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482846088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:26:02,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997226654] [2021-11-25 20:26:02,664 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2021-11-25 20:26:02,664 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:26:02,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:26:02,665 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:26:02,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:26:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:26:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:26:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:26:02,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:26:02,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:26:02,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:26:02,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:26:05,345 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:26:52,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1997226654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:26:52,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:26:52,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [16, 25, 25] total 96 [2021-11-25 20:26:52,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529931442] [2021-11-25 20:26:52,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:26:52,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 20:26:52,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:26:52,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 20:26:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1624, Invalid=7496, Unknown=0, NotChecked=0, Total=9120 [2021-11-25 20:26:52,025 INFO L87 Difference]: Start difference. First operand 5614 states and 7184 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:01,203 INFO L93 Difference]: Finished difference Result 6183 states and 7928 transitions. [2021-11-25 20:27:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-25 20:27:01,204 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-25 20:27:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:01,209 INFO L225 Difference]: With dead ends: 6183 [2021-11-25 20:27:01,209 INFO L226 Difference]: Without dead ends: 5505 [2021-11-25 20:27:01,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 142 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5010 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=1624, Invalid=7496, Unknown=0, NotChecked=0, Total=9120 [2021-11-25 20:27:01,215 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 67 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 3473 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 3479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:01,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 438 Invalid, 3479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3473 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-25 20:27:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5505 states. [2021-11-25 20:27:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5505 to 5505. [2021-11-25 20:27:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 5504 states have (on average 1.2796148255813953) internal successors, (7043), 5504 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states 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 20:27:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 7043 transitions. [2021-11-25 20:27:02,661 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 7043 transitions. Word has length 77 [2021-11-25 20:27:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:02,661 INFO L470 AbstractCegarLoop]: Abstraction has 5505 states and 7043 transitions. [2021-11-25 20:27:02,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 7043 transitions. [2021-11-25 20:27:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:27:02,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:02,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:02,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:02,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-25 20:27:02,885 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:27:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:02,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1589931852, now seen corresponding path program 1 times [2021-11-25 20:27:02,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:02,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331298115] [2021-11-25 20:27:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:02,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:27:03,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:03,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331298115] [2021-11-25 20:27:03,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331298115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:03,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499543823] [2021-11-25 20:27:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:03,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:03,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:03,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:03,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:27:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 20:27:03,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:27:04,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:27:04,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499543823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:04,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:27:04,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 26 [2021-11-25 20:27:04,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627255617] [2021-11-25 20:27:04,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:04,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:27:04,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:27:04,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-11-25 20:27:04,645 INFO L87 Difference]: Start difference. First operand 5505 states and 7043 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:08,188 INFO L93 Difference]: Finished difference Result 10540 states and 13564 transitions. [2021-11-25 20:27:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:27:08,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-25 20:27:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:08,199 INFO L225 Difference]: With dead ends: 10540 [2021-11-25 20:27:08,199 INFO L226 Difference]: Without dead ends: 8075 [2021-11-25 20:27:08,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 20:27:08,205 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 1293 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:08,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 1986 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:27:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2021-11-25 20:27:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 5439. [2021-11-25 20:27:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5438 states have (on average 1.285031261493196) internal successors, (6988), 5438 states have internal predecessors, (6988), 0 states have call successors, (0), 0 states 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 20:27:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 6988 transitions. [2021-11-25 20:27:09,956 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 6988 transitions. Word has length 77 [2021-11-25 20:27:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:09,956 INFO L470 AbstractCegarLoop]: Abstraction has 5439 states and 6988 transitions. [2021-11-25 20:27:09,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 6988 transitions. [2021-11-25 20:27:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 20:27:09,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:09,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:10,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 20:27:10,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:10,185 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:27:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1083321571, now seen corresponding path program 1 times [2021-11-25 20:27:10,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:10,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683008023] [2021-11-25 20:27:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:10,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:27:10,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:10,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683008023] [2021-11-25 20:27:10,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683008023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:10,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076099509] [2021-11-25 20:27:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:10,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:10,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:10,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:10,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398ced32-49f7-4317-ac6b-c71dd9d79c3f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:27:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:10,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-25 20:27:10,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:27:16,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:27:35,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076099509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:35,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918853733] [2021-11-25 20:27:35,215 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2021-11-25 20:27:35,216 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:35,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:35,217 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:35,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:27:35,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:35,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:35,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:35,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:27:35,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:35,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:35,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 20:27:59,653 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:29:38,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '518116#(and (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1| 127) (<= 0 ~id3~0) (= ~__return_7588~0 0) (<= 0 (+ ~p3_new~0 1)) (= ~__return_7619~0 0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1|) (= ~__return_6777~0 0) (= ~__return_7801~0 0) (= ~__return_8390~0 0) (= ~__return_8196~0 0) (= ~__return_8436~0 0) (= ~__return_7297~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~8#1| 1)) (<= 0 |ULTIMATE.start_main_~__tmp_3~0#1|) (<= |ULTIMATE.start_main_~__tmp_3~0#1| 1) (= ~__return_7907~0 0) (<= 0 ~id1~0) (= |ULTIMATE.start_main_~check__tmp~24#1| 1) (= |ULTIMATE.start_main_~check__tmp~1#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~2#1|) (= ~__return_6713~0 0) (<= ~__return_6348~0 1) (= ~__return_8103~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~2#1| 1)) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 1 ~r1~0) (= ~__return_8072~0 0) (= ~__return_7472~0 0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~1#1| 1)) (<= ~send1~0 127) (<= 1 ~__return_6487~0) (<= ~st1~0 0) (= ~__return_6833~0 0) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~__tmp_24~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~2#1| 256) 0) (<= ~mode2~0 1) (<= |ULTIMATE.start_main_~check__tmp~2#1| 1) (<= 0 ~st1~0) (<= 1 ~__return_7935~0) (<= 0 ~__return_7021~0) (<= 0 ~__return_8465~0) (<= ~r1~0 257) (= ~__return_7054~0 0) (= ~__return_7188~0 0) (<= 0 ~st2~0) (<= ~__return_8331~0 0) (<= ~p1~0 0) (= ~__return_7555~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 |ULTIMATE.start_main_~assert__arg~23#1|) (<= 0 ~p2~0) (<= 0 ~__return_6864~0) (<= 0 ~__return_8167~0) (= ~__return_8630~0 0) (<= 0 ~__return_8302~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~id1~0 127) (= ~__return_7268~0 0) (<= (+ ~p3_old~0 1) 0) (= ~__return_8524~0 0) (<= ~__return_7131~0 0) (<= 0 ~__return_6911~0) (<= 0 ~__return_7966~0) (= ~__return_8044~0 0) (= ~__return_7703~0 0) (= ~__return_8661~0 0) (<= ~__return_8015~0 0) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= 0 ~__return_8493~0) (= ~__return_7666~0 0) (<= ~__return_7021~0 0) (= ~__return_7832~0 0) (<= 0 ~__return_7131~0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= ~__return_6426~0 0) (<= (+ ~p2_new~0 1) 0) (<= ~__return_8167~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~2#1| 1) 0) (<= ~__return_6911~0 0) (<= 0 ~__return_7421~0) (<= 0 ~__return_8602~0) (<= ~__return_7935~0 1) (<= 1 ~__return_6348~0) (= ~__return_7219~0 0) (<= ~__return_8302~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~8#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (= ~__return_8255~0 0) (<= 0 ~__return_main~0) (= ~__return_6984~0 0) (<= 0 ~__return_6950~0) (<= 0 ~__return_7356~0) (<= ~id3~0 127) (<= |ULTIMATE.start_main_~assert__arg~23#1| 1) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~__return_8602~0 0) (<= ~__return_7966~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~1#1| 1) 0) (<= ~__return_6487~0 1) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= 0 |ULTIMATE.start_main_~assert__arg~2#1|) (<= ~p2~0 0) (<= ~__return_8359~0 0) (<= |ULTIMATE.start_main_~__tmp_24~0#1| 1) (<= (+ |ULTIMATE.start_main_~node1__m1~1#1| 1) 0) (<= ~__return_7421~0 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (= ~__return_7878~0 0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (= ~__return_7737~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (<= ~__return_8493~0 0) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (<= 0 ~__return_7774~0) (<= ~__return_6554~0 1) (<= 0 ~__return_8015~0) (<= ~__return_6864~0 0) (= ~__return_7506~0 0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (<= ~__return_7774~0 0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 ~__return_8359~0) (<= 0 ~__return_8331~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~1#1| 1)) (= ~__return_7160~0 0) (= ~__return_8224~0 0) (<= |ULTIMATE.start_main_~assert__arg~2#1| 1) (<= ~__return_6950~0 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (= ~__return_7085~0 0) (= ~__return_8573~0 0) (= ~__return_7325~0 0) (= |#NULL.base| 0) (<= ~__return_8465~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (<= ~__return_7356~0 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2021-11-25 20:29:38,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:29:38,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:29:38,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 26] total 65 [2021-11-25 20:29:38,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117783981] [2021-11-25 20:29:38,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:29:38,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-25 20:29:38,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:38,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-25 20:29:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2050, Invalid=12712, Unknown=0, NotChecked=0, Total=14762 [2021-11-25 20:29:38,501 INFO L87 Difference]: Start difference. First operand 5439 states and 6988 transitions. Second operand has 65 states, 65 states have (on average 3.646153846153846) internal successors, (237), 65 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)