./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8 --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 7853b3826176a0fe575c35877885ca2c640283bf6a2200e21b7819452b726d2c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:58:02,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:58:02,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:58:02,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:58:02,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:58:02,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:58:02,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:58:02,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:58:02,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:58:02,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:58:02,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:58:02,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:58:02,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:58:02,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:58:02,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:58:02,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:58:02,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:58:02,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:58:02,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:58:02,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:58:02,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:58:02,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:58:02,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:58:02,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:58:02,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:58:02,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:58:02,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:58:02,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:58:02,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:58:02,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:58:02,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:58:02,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:58:02,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:58:02,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:58:02,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:58:02,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:58:02,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:58:02,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:58:02,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:58:02,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:58:02,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:58:02,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:58:02,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:58:02,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:58:02,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:58:02,209 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:58:02,209 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:58:02,209 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:58:02,210 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:58:02,210 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:58:02,210 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:58:02,210 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:58:02,210 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:58:02,211 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:58:02,211 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:58:02,211 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:58:02,211 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:58:02,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:58:02,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:58:02,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:58:02,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:58:02,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:58:02,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:58:02,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:58:02,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:58:02,214 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:58:02,214 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:58:02,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:58:02,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:58:02,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:58:02,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:58:02,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:58:02,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:02,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:58:02,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:58:02,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:58:02,216 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:58:02,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:58:02,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:58:02,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:58:02,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:58:02,217 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_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7853b3826176a0fe575c35877885ca2c640283bf6a2200e21b7819452b726d2c [2021-11-07 00:58:02,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:58:02,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:58:02,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:58:02,548 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:58:02,549 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:58:02,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-07 00:58:02,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/data/9256aab60/375cc9807c9b44b1afb14f9bde7ad281/FLAG8a7e80966 [2021-11-07 00:58:03,524 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:58:03,525 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-07 00:58:03,553 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/data/9256aab60/375cc9807c9b44b1afb14f9bde7ad281/FLAG8a7e80966 [2021-11-07 00:58:04,039 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/data/9256aab60/375cc9807c9b44b1afb14f9bde7ad281 [2021-11-07 00:58:04,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:58:04,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:58:04,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:04,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:58:04,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:58:04,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:04" (1/1) ... [2021-11-07 00:58:04,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3dbb02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:04, skipping insertion in model container [2021-11-07 00:58:04,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:04" (1/1) ... [2021-11-07 00:58:04,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:58:04,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:58:04,971 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[28933,28946] [2021-11-07 00:58:05,103 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[50969,50982] [2021-11-07 00:58:05,132 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[58695,58708] [2021-11-07 00:58:05,212 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[83802,83815] [2021-11-07 00:58:05,255 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[98975,98988] [2021-11-07 00:58:05,299 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[115686,115699] [2021-11-07 00:58:05,354 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[132053,132066] [2021-11-07 00:58:05,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:05,569 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:58:05,772 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[28933,28946] [2021-11-07 00:58:05,855 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[50969,50982] [2021-11-07 00:58:05,873 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[58695,58708] [2021-11-07 00:58:05,955 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[83802,83815] [2021-11-07 00:58:05,988 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[98975,98988] [2021-11-07 00:58:06,026 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[115686,115699] [2021-11-07 00:58:06,063 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[132053,132066] [2021-11-07 00:58:06,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:06,249 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:58:06,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06 WrapperNode [2021-11-07 00:58:06,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:06,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:58:06,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:58:06,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:58:06,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:58:06,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:58:06,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:58:06,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:58:06,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:58:06,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:58:06,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:58:06,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:58:06,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (1/1) ... [2021-11-07 00:58:06,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:06,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:06,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:58:06,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bee229-80e5-4682-a497-85645aa8669f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:58:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 00:58:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:58:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:58:06,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:58:12,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:58:12,791 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 00:58:12,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:12 BoogieIcfgContainer [2021-11-07 00:58:12,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:58:12,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:58:12,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:58:12,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:58:12,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:58:04" (1/3) ... [2021-11-07 00:58:12,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469827f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:12, skipping insertion in model container [2021-11-07 00:58:12,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:06" (2/3) ... [2021-11-07 00:58:12,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469827f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:12, skipping insertion in model container [2021-11-07 00:58:12,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:12" (3/3) ... [2021-11-07 00:58:12,811 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-07 00:58:12,816 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:58:12,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-07 00:58:12,888 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:58:12,896 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 [2021-11-07 00:58:12,897 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-07 00:58:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 1926 states, 1918 states have (on average 1.802398331595412) internal successors, (3457), 1925 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 00:58:13,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:13,023 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:13,024 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1031762117, now seen corresponding path program 1 times [2021-11-07 00:58:13,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:13,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412181966] [2021-11-07 00:58:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:13,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:13,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:13,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412181966] [2021-11-07 00:58:13,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412181966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:13,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:13,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:58:13,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203416696] [2021-11-07 00:58:13,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:13,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:13,589 INFO L87 Difference]: Start difference. First operand has 1926 states, 1918 states have (on average 1.802398331595412) internal successors, (3457), 1925 states have internal predecessors, (3457), 0 states have call successors, (0), 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 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:15,642 INFO L93 Difference]: Finished difference Result 3061 states and 5392 transitions. [2021-11-07 00:58:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 00:58:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:15,671 INFO L225 Difference]: With dead ends: 3061 [2021-11-07 00:58:15,671 INFO L226 Difference]: Without dead ends: 1954 [2021-11-07 00:58:15,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:58:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-11-07 00:58:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1941. [2021-11-07 00:58:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1934 states have (on average 1.31282316442606) internal successors, (2539), 1940 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2539 transitions. [2021-11-07 00:58:15,887 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2539 transitions. Word has length 63 [2021-11-07 00:58:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:15,888 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2539 transitions. [2021-11-07 00:58:15,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2539 transitions. [2021-11-07 00:58:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 00:58:15,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:15,897 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:15,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 00:58:15,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash 505276640, now seen corresponding path program 1 times [2021-11-07 00:58:15,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:15,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664109617] [2021-11-07 00:58:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:15,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:16,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:16,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664109617] [2021-11-07 00:58:16,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664109617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:16,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:16,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:58:16,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832031703] [2021-11-07 00:58:16,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:16,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:16,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:16,106 INFO L87 Difference]: Start difference. First operand 1941 states and 2539 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:17,886 INFO L93 Difference]: Finished difference Result 3913 states and 5187 transitions. [2021-11-07 00:58:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 00:58:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:17,910 INFO L225 Difference]: With dead ends: 3913 [2021-11-07 00:58:17,911 INFO L226 Difference]: Without dead ends: 2630 [2021-11-07 00:58:17,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:58:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-11-07 00:58:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2624. [2021-11-07 00:58:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2617 states have (on average 1.3129537638517386) internal successors, (3436), 2623 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3436 transitions. [2021-11-07 00:58:18,103 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3436 transitions. Word has length 64 [2021-11-07 00:58:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:18,105 INFO L470 AbstractCegarLoop]: Abstraction has 2624 states and 3436 transitions. [2021-11-07 00:58:18,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3436 transitions. [2021-11-07 00:58:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 00:58:18,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:18,114 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:18,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 00:58:18,115 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash 285379470, now seen corresponding path program 1 times [2021-11-07 00:58:18,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:18,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366357810] [2021-11-07 00:58:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:18,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:18,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:18,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366357810] [2021-11-07 00:58:18,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366357810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:18,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:18,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:58:18,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352125127] [2021-11-07 00:58:18,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:18,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:18,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:18,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:18,278 INFO L87 Difference]: Start difference. First operand 2624 states and 3436 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:20,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:20,034 INFO L93 Difference]: Finished difference Result 5369 states and 7049 transitions. [2021-11-07 00:58:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:20,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 00:58:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:20,056 INFO L225 Difference]: With dead ends: 5369 [2021-11-07 00:58:20,056 INFO L226 Difference]: Without dead ends: 3528 [2021-11-07 00:58:20,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:58:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-11-07 00:58:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3514. [2021-11-07 00:58:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3507 states have (on average 1.2959794696321643) internal successors, (4545), 3513 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 4545 transitions. [2021-11-07 00:58:20,220 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 4545 transitions. Word has length 64 [2021-11-07 00:58:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:20,221 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 4545 transitions. [2021-11-07 00:58:20,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 4545 transitions. [2021-11-07 00:58:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 00:58:20,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:20,227 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:20,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 00:58:20,228 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:20,229 INFO L85 PathProgramCache]: Analyzing trace with hash -874930976, now seen corresponding path program 1 times [2021-11-07 00:58:20,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:20,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748773056] [2021-11-07 00:58:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:20,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:20,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:20,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748773056] [2021-11-07 00:58:20,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748773056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:20,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:20,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:58:20,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988019287] [2021-11-07 00:58:20,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:20,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:20,424 INFO L87 Difference]: Start difference. First operand 3514 states and 4545 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:23,717 INFO L93 Difference]: Finished difference Result 4102 states and 5321 transitions. [2021-11-07 00:58:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 00:58:23,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 00:58:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:23,747 INFO L225 Difference]: With dead ends: 4102 [2021-11-07 00:58:23,747 INFO L226 Difference]: Without dead ends: 4097 [2021-11-07 00:58:23,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:58:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-11-07 00:58:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3514. [2021-11-07 00:58:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3507 states have (on average 1.2956943256344453) internal successors, (4544), 3513 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 4544 transitions. [2021-11-07 00:58:23,947 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 4544 transitions. Word has length 65 [2021-11-07 00:58:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:23,948 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 4544 transitions. [2021-11-07 00:58:23,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 4544 transitions. [2021-11-07 00:58:23,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 00:58:23,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:23,955 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:23,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 00:58:23,956 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash -428617911, now seen corresponding path program 1 times [2021-11-07 00:58:23,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:23,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884186292] [2021-11-07 00:58:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:23,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:24,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:24,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884186292] [2021-11-07 00:58:24,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884186292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:24,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:24,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 00:58:24,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565528748] [2021-11-07 00:58:24,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 00:58:24,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 00:58:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:58:24,298 INFO L87 Difference]: Start difference. First operand 3514 states and 4544 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:29,083 INFO L93 Difference]: Finished difference Result 5765 states and 7628 transitions. [2021-11-07 00:58:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 00:58:29,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 00:58:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:29,113 INFO L225 Difference]: With dead ends: 5765 [2021-11-07 00:58:29,114 INFO L226 Difference]: Without dead ends: 5208 [2021-11-07 00:58:29,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-11-07 00:58:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2021-11-07 00:58:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 3521. [2021-11-07 00:58:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3521 states, 3514 states have (on average 1.2951052931132612) internal successors, (4551), 3520 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3521 states to 3521 states and 4551 transitions. [2021-11-07 00:58:29,345 INFO L78 Accepts]: Start accepts. Automaton has 3521 states and 4551 transitions. Word has length 65 [2021-11-07 00:58:29,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:29,346 INFO L470 AbstractCegarLoop]: Abstraction has 3521 states and 4551 transitions. [2021-11-07 00:58:29,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3521 states and 4551 transitions. [2021-11-07 00:58:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 00:58:29,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:29,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:29,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 00:58:29,358 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:29,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2016295323, now seen corresponding path program 1 times [2021-11-07 00:58:29,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:29,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511105385] [2021-11-07 00:58:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:29,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:29,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:29,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511105385] [2021-11-07 00:58:29,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511105385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:29,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:29,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 00:58:29,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437622458] [2021-11-07 00:58:29,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 00:58:29,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 00:58:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:58:29,877 INFO L87 Difference]: Start difference. First operand 3521 states and 4551 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:34,038 INFO L93 Difference]: Finished difference Result 11387 states and 15594 transitions. [2021-11-07 00:58:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 00:58:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 00:58:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:34,099 INFO L225 Difference]: With dead ends: 11387 [2021-11-07 00:58:34,099 INFO L226 Difference]: Without dead ends: 11379 [2021-11-07 00:58:34,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 00:58:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11379 states. [2021-11-07 00:58:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11379 to 3513. [2021-11-07 00:58:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3507 states have (on average 1.2954091816367266) internal successors, (4543), 3512 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:34,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 4543 transitions. [2021-11-07 00:58:34,461 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 4543 transitions. Word has length 66 [2021-11-07 00:58:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:34,461 INFO L470 AbstractCegarLoop]: Abstraction has 3513 states and 4543 transitions. [2021-11-07 00:58:34,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 4543 transitions. [2021-11-07 00:58:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 00:58:34,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:34,469 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:34,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 00:58:34,469 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:34,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1740752215, now seen corresponding path program 1 times [2021-11-07 00:58:34,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:34,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268206764] [2021-11-07 00:58:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:34,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:34,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:34,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268206764] [2021-11-07 00:58:34,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268206764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:34,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:34,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:58:34,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563116680] [2021-11-07 00:58:34,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:34,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:34,536 INFO L87 Difference]: Start difference. First operand 3513 states and 4543 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:35,861 INFO L93 Difference]: Finished difference Result 6785 states and 8783 transitions. [2021-11-07 00:58:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:35,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 00:58:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:35,872 INFO L225 Difference]: With dead ends: 6785 [2021-11-07 00:58:35,873 INFO L226 Difference]: Without dead ends: 4521 [2021-11-07 00:58:35,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:58:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-11-07 00:58:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 4511. [2021-11-07 00:58:36,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 4505 states have (on average 1.2894561598224195) internal successors, (5809), 4510 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 5809 transitions. [2021-11-07 00:58:36,347 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 5809 transitions. Word has length 66 [2021-11-07 00:58:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:36,348 INFO L470 AbstractCegarLoop]: Abstraction has 4511 states and 5809 transitions. [2021-11-07 00:58:36,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 5809 transitions. [2021-11-07 00:58:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 00:58:36,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:36,356 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:36,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 00:58:36,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:36,357 INFO L85 PathProgramCache]: Analyzing trace with hash -167816723, now seen corresponding path program 1 times [2021-11-07 00:58:36,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:36,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434262918] [2021-11-07 00:58:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:36,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:36,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:36,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434262918] [2021-11-07 00:58:36,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434262918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:36,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:36,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 00:58:36,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645268825] [2021-11-07 00:58:36,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 00:58:36,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:36,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 00:58:36,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:58:36,698 INFO L87 Difference]: Start difference. First operand 4511 states and 5809 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:41,379 INFO L93 Difference]: Finished difference Result 13997 states and 19053 transitions. [2021-11-07 00:58:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 00:58:41,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 00:58:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:41,406 INFO L225 Difference]: With dead ends: 13997 [2021-11-07 00:58:41,406 INFO L226 Difference]: Without dead ends: 13119 [2021-11-07 00:58:41,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=328, Invalid=1232, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 00:58:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13119 states. [2021-11-07 00:58:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13119 to 4451. [2021-11-07 00:58:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4451 states, 4446 states have (on average 1.2878992352676564) internal successors, (5726), 4450 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4451 states to 4451 states and 5726 transitions. [2021-11-07 00:58:41,992 INFO L78 Accepts]: Start accepts. Automaton has 4451 states and 5726 transitions. Word has length 66 [2021-11-07 00:58:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:41,993 INFO L470 AbstractCegarLoop]: Abstraction has 4451 states and 5726 transitions. [2021-11-07 00:58:41,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 4451 states and 5726 transitions. [2021-11-07 00:58:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 00:58:42,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:42,004 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:42,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 00:58:42,005 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1849785436, now seen corresponding path program 1 times [2021-11-07 00:58:42,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:42,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550061339] [2021-11-07 00:58:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:42,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:42,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:42,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550061339] [2021-11-07 00:58:42,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550061339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:42,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:42,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 00:58:42,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363347982] [2021-11-07 00:58:42,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 00:58:42,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 00:58:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:58:42,211 INFO L87 Difference]: Start difference. First operand 4451 states and 5726 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:46,259 INFO L93 Difference]: Finished difference Result 8242 states and 10955 transitions. [2021-11-07 00:58:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 00:58:46,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 00:58:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:46,272 INFO L225 Difference]: With dead ends: 8242 [2021-11-07 00:58:46,272 INFO L226 Difference]: Without dead ends: 7389 [2021-11-07 00:58:46,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:58:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2021-11-07 00:58:46,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 4420. [2021-11-07 00:58:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4415 states have (on average 1.2874292185730465) internal successors, (5684), 4419 states have internal predecessors, (5684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 5684 transitions. [2021-11-07 00:58:46,876 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 5684 transitions. Word has length 67 [2021-11-07 00:58:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:46,877 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 5684 transitions. [2021-11-07 00:58:46,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 5684 transitions. [2021-11-07 00:58:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 00:58:46,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:46,883 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:46,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 00:58:46,884 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:46,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2035786332, now seen corresponding path program 1 times [2021-11-07 00:58:46,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:46,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478313413] [2021-11-07 00:58:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:46,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:47,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:47,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478313413] [2021-11-07 00:58:47,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478313413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:47,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:47,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:58:47,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817130020] [2021-11-07 00:58:47,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:47,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:47,005 INFO L87 Difference]: Start difference. First operand 4420 states and 5684 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:49,836 INFO L93 Difference]: Finished difference Result 6292 states and 8168 transitions. [2021-11-07 00:58:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 00:58:49,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 00:58:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:49,844 INFO L225 Difference]: With dead ends: 6292 [2021-11-07 00:58:49,845 INFO L226 Difference]: Without dead ends: 6284 [2021-11-07 00:58:49,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:58:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-11-07 00:58:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 4420. [2021-11-07 00:58:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4415 states have (on average 1.287202718006795) internal successors, (5683), 4419 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 5683 transitions. [2021-11-07 00:58:50,587 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 5683 transitions. Word has length 68 [2021-11-07 00:58:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:50,587 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 5683 transitions. [2021-11-07 00:58:50,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 5683 transitions. [2021-11-07 00:58:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 00:58:50,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:50,596 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:50,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 00:58:50,597 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:50,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1784891832, now seen corresponding path program 1 times [2021-11-07 00:58:50,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:50,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993449959] [2021-11-07 00:58:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:50,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:51,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:51,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993449959] [2021-11-07 00:58:51,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993449959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:51,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:51,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 00:58:51,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333305985] [2021-11-07 00:58:51,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 00:58:51,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 00:58:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:58:51,069 INFO L87 Difference]: Start difference. First operand 4420 states and 5683 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 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) [2021-11-07 00:58:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:56,418 INFO L93 Difference]: Finished difference Result 12888 states and 17319 transitions. [2021-11-07 00:58:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 00:58:56,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 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 [2021-11-07 00:58:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:56,429 INFO L225 Difference]: With dead ends: 12888 [2021-11-07 00:58:56,429 INFO L226 Difference]: Without dead ends: 12032 [2021-11-07 00:58:56,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=324, Invalid=866, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 00:58:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12032 states. [2021-11-07 00:58:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12032 to 4430. [2021-11-07 00:58:57,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4425 states have (on average 1.287231638418079) internal successors, (5696), 4429 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 5696 transitions. [2021-11-07 00:58:57,154 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 5696 transitions. Word has length 68 [2021-11-07 00:58:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:57,155 INFO L470 AbstractCegarLoop]: Abstraction has 4430 states and 5696 transitions. [2021-11-07 00:58:57,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 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) [2021-11-07 00:58:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 5696 transitions. [2021-11-07 00:58:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 00:58:57,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:57,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:57,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 00:58:57,164 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:58:57,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:57,165 INFO L85 PathProgramCache]: Analyzing trace with hash -541441223, now seen corresponding path program 1 times [2021-11-07 00:58:57,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:57,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979348224] [2021-11-07 00:58:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:57,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:57,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:57,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979348224] [2021-11-07 00:58:57,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979348224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:57,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:57,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 00:58:57,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936315927] [2021-11-07 00:58:57,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:57,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:57,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:57,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:57,284 INFO L87 Difference]: Start difference. First operand 4430 states and 5696 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:01,078 INFO L93 Difference]: Finished difference Result 8414 states and 11188 transitions. [2021-11-07 00:59:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:59:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 00:59:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:01,084 INFO L225 Difference]: With dead ends: 8414 [2021-11-07 00:59:01,084 INFO L226 Difference]: Without dead ends: 7581 [2021-11-07 00:59:01,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 00:59:01,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2021-11-07 00:59:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 4430. [2021-11-07 00:59:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4425 states have (on average 1.2870056497175142) internal successors, (5695), 4429 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 5695 transitions. [2021-11-07 00:59:01,665 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 5695 transitions. Word has length 69 [2021-11-07 00:59:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:01,665 INFO L470 AbstractCegarLoop]: Abstraction has 4430 states and 5695 transitions. [2021-11-07 00:59:01,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 5695 transitions. [2021-11-07 00:59:01,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 00:59:01,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:01,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:01,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 00:59:01,673 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:01,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash -463393113, now seen corresponding path program 1 times [2021-11-07 00:59:01,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:01,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880899624] [2021-11-07 00:59:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:01,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:02,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:02,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880899624] [2021-11-07 00:59:02,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880899624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:02,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:02,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-07 00:59:02,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837313801] [2021-11-07 00:59:02,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 00:59:02,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 00:59:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 00:59:02,036 INFO L87 Difference]: Start difference. First operand 4430 states and 5695 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:08,540 INFO L93 Difference]: Finished difference Result 13961 states and 18795 transitions. [2021-11-07 00:59:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 00:59:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 00:59:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:08,554 INFO L225 Difference]: With dead ends: 13961 [2021-11-07 00:59:08,555 INFO L226 Difference]: Without dead ends: 13062 [2021-11-07 00:59:08,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 00:59:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13062 states. [2021-11-07 00:59:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13062 to 4440. [2021-11-07 00:59:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4440 states, 4435 states have (on average 1.2870349492671929) internal successors, (5708), 4439 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 5708 transitions. [2021-11-07 00:59:09,421 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 5708 transitions. Word has length 69 [2021-11-07 00:59:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:09,422 INFO L470 AbstractCegarLoop]: Abstraction has 4440 states and 5708 transitions. [2021-11-07 00:59:09,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 5708 transitions. [2021-11-07 00:59:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 00:59:09,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:09,429 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:09,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 00:59:09,430 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1882503663, now seen corresponding path program 1 times [2021-11-07 00:59:09,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:09,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107109358] [2021-11-07 00:59:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:09,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:09,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:09,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107109358] [2021-11-07 00:59:09,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107109358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:09,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:09,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:09,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524281715] [2021-11-07 00:59:09,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:09,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:09,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:09,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:09,477 INFO L87 Difference]: Start difference. First operand 4440 states and 5708 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:10,484 INFO L93 Difference]: Finished difference Result 8518 states and 11036 transitions. [2021-11-07 00:59:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 00:59:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:10,491 INFO L225 Difference]: With dead ends: 8518 [2021-11-07 00:59:10,491 INFO L226 Difference]: Without dead ends: 5220 [2021-11-07 00:59:10,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2021-11-07 00:59:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5210. [2021-11-07 00:59:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5210 states, 5206 states have (on average 1.2817902420284288) internal successors, (6673), 5209 states have internal predecessors, (6673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 6673 transitions. [2021-11-07 00:59:11,345 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 6673 transitions. Word has length 69 [2021-11-07 00:59:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:11,345 INFO L470 AbstractCegarLoop]: Abstraction has 5210 states and 6673 transitions. [2021-11-07 00:59:11,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 6673 transitions. [2021-11-07 00:59:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 00:59:11,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:11,353 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:11,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 00:59:11,354 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:11,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 594946586, now seen corresponding path program 1 times [2021-11-07 00:59:11,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:11,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277771418] [2021-11-07 00:59:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:11,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:11,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:11,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277771418] [2021-11-07 00:59:11,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277771418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:11,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:11,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:11,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150537193] [2021-11-07 00:59:11,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:11,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:11,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:11,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:11,400 INFO L87 Difference]: Start difference. First operand 5210 states and 6673 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:12,795 INFO L93 Difference]: Finished difference Result 7887 states and 10306 transitions. [2021-11-07 00:59:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:12,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 00:59:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:12,800 INFO L225 Difference]: With dead ends: 7887 [2021-11-07 00:59:12,800 INFO L226 Difference]: Without dead ends: 4733 [2021-11-07 00:59:12,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-11-07 00:59:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 4729. [2021-11-07 00:59:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4729 states, 4727 states have (on average 1.2982864396022848) internal successors, (6137), 4728 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 6137 transitions. [2021-11-07 00:59:13,892 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 6137 transitions. Word has length 69 [2021-11-07 00:59:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:13,892 INFO L470 AbstractCegarLoop]: Abstraction has 4729 states and 6137 transitions. [2021-11-07 00:59:13,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 6137 transitions. [2021-11-07 00:59:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 00:59:13,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:13,897 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:13,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 00:59:13,898 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:13,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2125971745, now seen corresponding path program 1 times [2021-11-07 00:59:13,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:13,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225010104] [2021-11-07 00:59:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:13,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:13,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:13,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225010104] [2021-11-07 00:59:13,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225010104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:13,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:13,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 00:59:13,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492931391] [2021-11-07 00:59:13,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:59:13,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:59:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:59:13,993 INFO L87 Difference]: Start difference. First operand 4729 states and 6137 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:16,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:16,236 INFO L93 Difference]: Finished difference Result 8582 states and 11605 transitions. [2021-11-07 00:59:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:59:16,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 00:59:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:16,244 INFO L225 Difference]: With dead ends: 8582 [2021-11-07 00:59:16,244 INFO L226 Difference]: Without dead ends: 6368 [2021-11-07 00:59:16,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:59:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6368 states. [2021-11-07 00:59:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6368 to 5451. [2021-11-07 00:59:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5451 states, 5449 states have (on average 1.3413470361534225) internal successors, (7309), 5450 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5451 states to 5451 states and 7309 transitions. [2021-11-07 00:59:17,840 INFO L78 Accepts]: Start accepts. Automaton has 5451 states and 7309 transitions. Word has length 69 [2021-11-07 00:59:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:17,840 INFO L470 AbstractCegarLoop]: Abstraction has 5451 states and 7309 transitions. [2021-11-07 00:59:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 5451 states and 7309 transitions. [2021-11-07 00:59:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 00:59:17,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:17,846 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:17,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 00:59:17,847 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:17,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1302640947, now seen corresponding path program 1 times [2021-11-07 00:59:17,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:17,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165406769] [2021-11-07 00:59:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:17,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:18,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:18,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165406769] [2021-11-07 00:59:18,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165406769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:18,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:18,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 00:59:18,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322550113] [2021-11-07 00:59:18,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 00:59:18,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:18,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 00:59:18,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:18,010 INFO L87 Difference]: Start difference. First operand 5451 states and 7309 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:24,000 INFO L93 Difference]: Finished difference Result 11548 states and 15684 transitions. [2021-11-07 00:59:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 00:59:24,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 00:59:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:24,010 INFO L225 Difference]: With dead ends: 11548 [2021-11-07 00:59:24,010 INFO L226 Difference]: Without dead ends: 10422 [2021-11-07 00:59:24,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:59:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10422 states. [2021-11-07 00:59:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10422 to 5451. [2021-11-07 00:59:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5451 states, 5449 states have (on average 1.3411635162415123) internal successors, (7308), 5450 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) [2021-11-07 00:59:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5451 states to 5451 states and 7308 transitions. [2021-11-07 00:59:25,652 INFO L78 Accepts]: Start accepts. Automaton has 5451 states and 7308 transitions. Word has length 70 [2021-11-07 00:59:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:25,652 INFO L470 AbstractCegarLoop]: Abstraction has 5451 states and 7308 transitions. [2021-11-07 00:59:25,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5451 states and 7308 transitions. [2021-11-07 00:59:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 00:59:25,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:25,656 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:25,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 00:59:25,656 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:25,656 INFO L85 PathProgramCache]: Analyzing trace with hash -538026380, now seen corresponding path program 1 times [2021-11-07 00:59:25,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:25,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142134019] [2021-11-07 00:59:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:25,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:25,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:25,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142134019] [2021-11-07 00:59:25,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142134019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:25,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:25,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:25,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015396911] [2021-11-07 00:59:25,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:25,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:25,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:25,705 INFO L87 Difference]: Start difference. First operand 5451 states and 7308 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:27,734 INFO L93 Difference]: Finished difference Result 7440 states and 10118 transitions. [2021-11-07 00:59:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:27,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 00:59:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:27,740 INFO L225 Difference]: With dead ends: 7440 [2021-11-07 00:59:27,740 INFO L226 Difference]: Without dead ends: 6128 [2021-11-07 00:59:27,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:27,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-11-07 00:59:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 5177. [2021-11-07 00:59:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5177 states, 5175 states have (on average 1.3497584541062801) internal successors, (6985), 5176 states have internal predecessors, (6985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5177 states to 5177 states and 6985 transitions. [2021-11-07 00:59:29,374 INFO L78 Accepts]: Start accepts. Automaton has 5177 states and 6985 transitions. Word has length 70 [2021-11-07 00:59:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:29,374 INFO L470 AbstractCegarLoop]: Abstraction has 5177 states and 6985 transitions. [2021-11-07 00:59:29,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 5177 states and 6985 transitions. [2021-11-07 00:59:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 00:59:29,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:29,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:29,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 00:59:29,379 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:29,380 INFO L85 PathProgramCache]: Analyzing trace with hash -30289550, now seen corresponding path program 1 times [2021-11-07 00:59:29,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:29,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371446951] [2021-11-07 00:59:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:29,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:29,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:29,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371446951] [2021-11-07 00:59:29,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371446951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:29,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:29,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 00:59:29,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448695877] [2021-11-07 00:59:29,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 00:59:29,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:29,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 00:59:29,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:29,514 INFO L87 Difference]: Start difference. First operand 5177 states and 6985 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:33,534 INFO L93 Difference]: Finished difference Result 7603 states and 10203 transitions. [2021-11-07 00:59:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 00:59:33,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 00:59:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:33,541 INFO L225 Difference]: With dead ends: 7603 [2021-11-07 00:59:33,541 INFO L226 Difference]: Without dead ends: 6834 [2021-11-07 00:59:33,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:59:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6834 states. [2021-11-07 00:59:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6834 to 5177. [2021-11-07 00:59:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5177 states, 5175 states have (on average 1.3495652173913044) internal successors, (6984), 5176 states have internal predecessors, (6984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5177 states to 5177 states and 6984 transitions. [2021-11-07 00:59:35,198 INFO L78 Accepts]: Start accepts. Automaton has 5177 states and 6984 transitions. Word has length 70 [2021-11-07 00:59:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:35,199 INFO L470 AbstractCegarLoop]: Abstraction has 5177 states and 6984 transitions. [2021-11-07 00:59:35,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 5177 states and 6984 transitions. [2021-11-07 00:59:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 00:59:35,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:35,202 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:35,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 00:59:35,202 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1966113785, now seen corresponding path program 1 times [2021-11-07 00:59:35,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:35,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807998323] [2021-11-07 00:59:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:35,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:35,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:35,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807998323] [2021-11-07 00:59:35,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807998323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:35,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:35,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960383231] [2021-11-07 00:59:35,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:35,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:35,257 INFO L87 Difference]: Start difference. First operand 5177 states and 6984 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:38,106 INFO L93 Difference]: Finished difference Result 10767 states and 14935 transitions. [2021-11-07 00:59:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 00:59:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:38,113 INFO L225 Difference]: With dead ends: 10767 [2021-11-07 00:59:38,113 INFO L226 Difference]: Without dead ends: 7373 [2021-11-07 00:59:38,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7373 states. [2021-11-07 00:59:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7373 to 6961. [2021-11-07 00:59:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6959 states have (on average 1.3589596206351486) internal successors, (9457), 6960 states have internal predecessors, (9457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 9457 transitions. [2021-11-07 00:59:40,488 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 9457 transitions. Word has length 70 [2021-11-07 00:59:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:40,488 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 9457 transitions. [2021-11-07 00:59:40,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:40,489 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 9457 transitions. [2021-11-07 00:59:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 00:59:40,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:40,492 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:40,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 00:59:40,492 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1395696457, now seen corresponding path program 1 times [2021-11-07 00:59:40,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:40,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980509570] [2021-11-07 00:59:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:40,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:40,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:40,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980509570] [2021-11-07 00:59:40,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980509570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:40,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:40,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:40,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212412931] [2021-11-07 00:59:40,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:40,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:40,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:40,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:40,538 INFO L87 Difference]: Start difference. First operand 6961 states and 9457 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2021-11-07 00:59:44,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:44,619 INFO L93 Difference]: Finished difference Result 14823 states and 20490 transitions. [2021-11-07 00:59:44,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:44,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 [2021-11-07 00:59:44,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:44,628 INFO L225 Difference]: With dead ends: 14823 [2021-11-07 00:59:44,628 INFO L226 Difference]: Without dead ends: 10163 [2021-11-07 00:59:44,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-11-07 00:59:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 10161. [2021-11-07 00:59:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10161 states, 10159 states have (on average 1.3616497686780196) internal successors, (13833), 10160 states have internal predecessors, (13833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10161 states to 10161 states and 13833 transitions. [2021-11-07 00:59:48,587 INFO L78 Accepts]: Start accepts. Automaton has 10161 states and 13833 transitions. Word has length 71 [2021-11-07 00:59:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:48,587 INFO L470 AbstractCegarLoop]: Abstraction has 10161 states and 13833 transitions. [2021-11-07 00:59:48,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2021-11-07 00:59:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10161 states and 13833 transitions. [2021-11-07 00:59:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 00:59:48,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:48,590 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:48,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 00:59:48,590 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 00:59:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1208387843, now seen corresponding path program 1 times [2021-11-07 00:59:48,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:48,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502919021] [2021-11-07 00:59:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:48,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:48,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:48,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502919021] [2021-11-07 00:59:48,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502919021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:48,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:48,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:48,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285343001] [2021-11-07 00:59:48,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:48,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:48,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:48,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:48,635 INFO L87 Difference]: Start difference. First operand 10161 states and 13833 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2021-11-07 00:59:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:54,342 INFO L93 Difference]: Finished difference Result 20220 states and 27534 transitions. [2021-11-07 00:59:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:54,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 [2021-11-07 00:59:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:54,358 INFO L225 Difference]: With dead ends: 20220 [2021-11-07 00:59:54,358 INFO L226 Difference]: Without dead ends: 13689 [2021-11-07 00:59:54,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2021-11-07 01:00:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 13687. [2021-11-07 01:00:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13687 states, 13685 states have (on average 1.336353671903544) internal successors, (18288), 13686 states have internal predecessors, (18288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13687 states to 13687 states and 18288 transitions. [2021-11-07 01:00:00,316 INFO L78 Accepts]: Start accepts. Automaton has 13687 states and 18288 transitions. Word has length 71 [2021-11-07 01:00:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:00,316 INFO L470 AbstractCegarLoop]: Abstraction has 13687 states and 18288 transitions. [2021-11-07 01:00:00,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2021-11-07 01:00:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 13687 states and 18288 transitions. [2021-11-07 01:00:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:00:00,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:00,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:00,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 01:00:00,320 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:00,321 INFO L85 PathProgramCache]: Analyzing trace with hash 38986714, now seen corresponding path program 1 times [2021-11-07 01:00:00,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:00,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791879025] [2021-11-07 01:00:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:00,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:00,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:00,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791879025] [2021-11-07 01:00:00,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791879025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:00,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:00,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:00:00,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644598035] [2021-11-07 01:00:00,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:00:00,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:00:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:00:00,449 INFO L87 Difference]: Start difference. First operand 13687 states and 18288 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 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) [2021-11-07 01:00:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:10,326 INFO L93 Difference]: Finished difference Result 19845 states and 26353 transitions. [2021-11-07 01:00:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:00:10,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 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 [2021-11-07 01:00:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:10,345 INFO L225 Difference]: With dead ends: 19845 [2021-11-07 01:00:10,345 INFO L226 Difference]: Without dead ends: 18992 [2021-11-07 01:00:10,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:00:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18992 states. [2021-11-07 01:00:16,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18992 to 13686. [2021-11-07 01:00:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13686 states, 13684 states have (on average 1.3363051739257528) internal successors, (18286), 13685 states have internal predecessors, (18286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13686 states to 13686 states and 18286 transitions. [2021-11-07 01:00:16,340 INFO L78 Accepts]: Start accepts. Automaton has 13686 states and 18286 transitions. Word has length 71 [2021-11-07 01:00:16,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:16,340 INFO L470 AbstractCegarLoop]: Abstraction has 13686 states and 18286 transitions. [2021-11-07 01:00:16,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 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) [2021-11-07 01:00:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 13686 states and 18286 transitions. [2021-11-07 01:00:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:00:16,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:16,344 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:16,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 01:00:16,344 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:16,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1101543161, now seen corresponding path program 1 times [2021-11-07 01:00:16,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:16,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326016823] [2021-11-07 01:00:16,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:16,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:16,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:16,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326016823] [2021-11-07 01:00:16,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326016823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:16,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:16,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:00:16,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474039494] [2021-11-07 01:00:16,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:00:16,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:00:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:00:16,517 INFO L87 Difference]: Start difference. First operand 13686 states and 18286 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 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) [2021-11-07 01:00:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:33,435 INFO L93 Difference]: Finished difference Result 31887 states and 42381 transitions. [2021-11-07 01:00:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:00:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:00:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:33,470 INFO L225 Difference]: With dead ends: 31887 [2021-11-07 01:00:33,471 INFO L226 Difference]: Without dead ends: 31032 [2021-11-07 01:00:33,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:00:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31032 states. [2021-11-07 01:00:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31032 to 13690. [2021-11-07 01:00:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13690 states, 13688 states have (on average 1.3362068965517242) internal successors, (18290), 13689 states have internal predecessors, (18290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13690 states to 13690 states and 18290 transitions. [2021-11-07 01:00:39,742 INFO L78 Accepts]: Start accepts. Automaton has 13690 states and 18290 transitions. Word has length 72 [2021-11-07 01:00:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:39,742 INFO L470 AbstractCegarLoop]: Abstraction has 13690 states and 18290 transitions. [2021-11-07 01:00:39,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 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) [2021-11-07 01:00:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 13690 states and 18290 transitions. [2021-11-07 01:00:39,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:00:39,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:39,744 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:39,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 01:00:39,745 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1479892977, now seen corresponding path program 1 times [2021-11-07 01:00:39,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:39,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214157044] [2021-11-07 01:00:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:39,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:40,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:40,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214157044] [2021-11-07 01:00:40,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214157044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:40,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:40,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:00:40,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096347762] [2021-11-07 01:00:40,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:00:40,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:40,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:00:40,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:00:40,042 INFO L87 Difference]: Start difference. First operand 13690 states and 18290 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 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) [2021-11-07 01:00:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:53,090 INFO L93 Difference]: Finished difference Result 26412 states and 35132 transitions. [2021-11-07 01:00:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:00:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:00:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:53,115 INFO L225 Difference]: With dead ends: 26412 [2021-11-07 01:00:53,115 INFO L226 Difference]: Without dead ends: 24547 [2021-11-07 01:00:53,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:00:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24547 states. [2021-11-07 01:00:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24547 to 13566. [2021-11-07 01:00:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13566 states, 13565 states have (on average 1.3366015481017324) internal successors, (18131), 13565 states have internal predecessors, (18131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13566 states to 13566 states and 18131 transitions. [2021-11-07 01:00:59,356 INFO L78 Accepts]: Start accepts. Automaton has 13566 states and 18131 transitions. Word has length 72 [2021-11-07 01:00:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:59,356 INFO L470 AbstractCegarLoop]: Abstraction has 13566 states and 18131 transitions. [2021-11-07 01:00:59,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 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) [2021-11-07 01:00:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 13566 states and 18131 transitions. [2021-11-07 01:00:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:00:59,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:59,360 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:59,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 01:00:59,360 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:59,361 INFO L85 PathProgramCache]: Analyzing trace with hash 805421842, now seen corresponding path program 1 times [2021-11-07 01:00:59,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:59,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788679648] [2021-11-07 01:00:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:59,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:59,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:59,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788679648] [2021-11-07 01:00:59,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788679648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:59,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:59,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:00:59,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508996577] [2021-11-07 01:00:59,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:00:59,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:00:59,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:00:59,598 INFO L87 Difference]: Start difference. First operand 13566 states and 18131 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 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) [2021-11-07 01:01:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:25,332 INFO L93 Difference]: Finished difference Result 44647 states and 59427 transitions. [2021-11-07 01:01:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 01:01:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 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 [2021-11-07 01:01:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:25,382 INFO L225 Difference]: With dead ends: 44647 [2021-11-07 01:01:25,382 INFO L226 Difference]: Without dead ends: 42841 [2021-11-07 01:01:25,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=655, Invalid=2101, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 01:01:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42841 states. [2021-11-07 01:01:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42841 to 13525. [2021-11-07 01:01:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13525 states, 13524 states have (on average 1.3366607512570245) internal successors, (18077), 13524 states have internal predecessors, (18077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13525 states to 13525 states and 18077 transitions. [2021-11-07 01:01:32,240 INFO L78 Accepts]: Start accepts. Automaton has 13525 states and 18077 transitions. Word has length 73 [2021-11-07 01:01:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:32,240 INFO L470 AbstractCegarLoop]: Abstraction has 13525 states and 18077 transitions. [2021-11-07 01:01:32,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 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) [2021-11-07 01:01:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 13525 states and 18077 transitions. [2021-11-07 01:01:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:01:32,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:32,242 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:01:32,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 01:01:32,243 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:01:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:32,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1846027830, now seen corresponding path program 1 times [2021-11-07 01:01:32,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:32,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059095533] [2021-11-07 01:01:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:32,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:32,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:32,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059095533] [2021-11-07 01:01:32,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059095533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:32,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:32,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:01:32,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561804912] [2021-11-07 01:01:32,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:01:32,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:01:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:01:32,348 INFO L87 Difference]: Start difference. First operand 13525 states and 18077 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 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) [2021-11-07 01:01:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:43,623 INFO L93 Difference]: Finished difference Result 20060 states and 26622 transitions. [2021-11-07 01:01:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:01:43,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 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 [2021-11-07 01:01:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:43,642 INFO L225 Difference]: With dead ends: 20060 [2021-11-07 01:01:43,642 INFO L226 Difference]: Without dead ends: 19206 [2021-11-07 01:01:43,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:01:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19206 states. [2021-11-07 01:01:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19206 to 13525. [2021-11-07 01:01:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13525 states, 13524 states have (on average 1.336586808636498) internal successors, (18076), 13524 states have internal predecessors, (18076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13525 states to 13525 states and 18076 transitions. [2021-11-07 01:01:50,453 INFO L78 Accepts]: Start accepts. Automaton has 13525 states and 18076 transitions. Word has length 73 [2021-11-07 01:01:50,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:50,453 INFO L470 AbstractCegarLoop]: Abstraction has 13525 states and 18076 transitions. [2021-11-07 01:01:50,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 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) [2021-11-07 01:01:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 13525 states and 18076 transitions. [2021-11-07 01:01:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:01:50,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:50,455 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:01:50,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 01:01:50,455 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:01:50,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:50,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1717177262, now seen corresponding path program 1 times [2021-11-07 01:01:50,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:50,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176728795] [2021-11-07 01:01:50,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:50,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:50,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:50,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176728795] [2021-11-07 01:01:50,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176728795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:50,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:50,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:01:50,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289999715] [2021-11-07 01:01:50,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:01:50,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:50,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:01:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:01:50,555 INFO L87 Difference]: Start difference. First operand 13525 states and 18076 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 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) [2021-11-07 01:02:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:02,710 INFO L93 Difference]: Finished difference Result 21729 states and 28697 transitions. [2021-11-07 01:02:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:02:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 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 [2021-11-07 01:02:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:02,731 INFO L225 Difference]: With dead ends: 21729 [2021-11-07 01:02:02,731 INFO L226 Difference]: Without dead ends: 20865 [2021-11-07 01:02:02,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:02:02,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20865 states. [2021-11-07 01:02:09,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20865 to 13525. [2021-11-07 01:02:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13525 states, 13524 states have (on average 1.3365128660159715) internal successors, (18075), 13524 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13525 states to 13525 states and 18075 transitions. [2021-11-07 01:02:09,464 INFO L78 Accepts]: Start accepts. Automaton has 13525 states and 18075 transitions. Word has length 73 [2021-11-07 01:02:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:09,464 INFO L470 AbstractCegarLoop]: Abstraction has 13525 states and 18075 transitions. [2021-11-07 01:02:09,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 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) [2021-11-07 01:02:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 13525 states and 18075 transitions. [2021-11-07 01:02:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:02:09,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:09,467 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:09,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 01:02:09,467 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:02:09,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:09,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1612032279, now seen corresponding path program 1 times [2021-11-07 01:02:09,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:02:09,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408365847] [2021-11-07 01:02:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:09,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:02:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:09,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:02:09,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408365847] [2021-11-07 01:02:09,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408365847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:09,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:09,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 01:02:09,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834086482] [2021-11-07 01:02:09,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:02:09,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:02:09,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:02:09,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:02:09,820 INFO L87 Difference]: Start difference. First operand 13525 states and 18075 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 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) [2021-11-07 01:02:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:30,305 INFO L93 Difference]: Finished difference Result 34286 states and 45680 transitions. [2021-11-07 01:02:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:02:30,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:02:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:30,348 INFO L225 Difference]: With dead ends: 34286 [2021-11-07 01:02:30,348 INFO L226 Difference]: Without dead ends: 33433 [2021-11-07 01:02:30,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:02:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33433 states. [2021-11-07 01:02:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33433 to 13524. [2021-11-07 01:02:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13524 states, 13523 states have (on average 1.3364638024107076) internal successors, (18073), 13523 states have internal predecessors, (18073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13524 states to 13524 states and 18073 transitions. [2021-11-07 01:02:37,560 INFO L78 Accepts]: Start accepts. Automaton has 13524 states and 18073 transitions. Word has length 75 [2021-11-07 01:02:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:37,561 INFO L470 AbstractCegarLoop]: Abstraction has 13524 states and 18073 transitions. [2021-11-07 01:02:37,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 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) [2021-11-07 01:02:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 13524 states and 18073 transitions. [2021-11-07 01:02:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:02:37,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:37,564 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:37,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 01:02:37,564 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:02:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1281710134, now seen corresponding path program 1 times [2021-11-07 01:02:37,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:02:37,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701909093] [2021-11-07 01:02:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:37,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:02:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:37,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:02:37,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701909093] [2021-11-07 01:02:37,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701909093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:37,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:37,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:02:37,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100859315] [2021-11-07 01:02:37,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:37,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:02:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:37,602 INFO L87 Difference]: Start difference. First operand 13524 states and 18073 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:45,402 INFO L93 Difference]: Finished difference Result 26430 states and 35500 transitions. [2021-11-07 01:02:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:02:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:02:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:45,419 INFO L225 Difference]: With dead ends: 26430 [2021-11-07 01:02:45,419 INFO L226 Difference]: Without dead ends: 14349 [2021-11-07 01:02:45,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14349 states. [2021-11-07 01:02:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14349 to 12510. [2021-11-07 01:02:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12510 states, 12509 states have (on average 1.3388760092733232) internal successors, (16748), 12509 states have internal predecessors, (16748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12510 states to 12510 states and 16748 transitions. [2021-11-07 01:02:52,114 INFO L78 Accepts]: Start accepts. Automaton has 12510 states and 16748 transitions. Word has length 75 [2021-11-07 01:02:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:52,115 INFO L470 AbstractCegarLoop]: Abstraction has 12510 states and 16748 transitions. [2021-11-07 01:02:52,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 12510 states and 16748 transitions. [2021-11-07 01:02:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:02:52,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:52,117 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:52,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 01:02:52,117 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:02:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1626034959, now seen corresponding path program 1 times [2021-11-07 01:02:52,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:02:52,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755636586] [2021-11-07 01:02:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:52,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:02:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:52,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:02:52,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755636586] [2021-11-07 01:02:52,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755636586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:52,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:52,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:02:52,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701699203] [2021-11-07 01:02:52,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:02:52,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:02:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:02:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:02:52,169 INFO L87 Difference]: Start difference. First operand 12510 states and 16748 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:02,177 INFO L93 Difference]: Finished difference Result 29826 states and 40356 transitions. [2021-11-07 01:03:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:02,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:03:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:02,197 INFO L225 Difference]: With dead ends: 29826 [2021-11-07 01:03:02,197 INFO L226 Difference]: Without dead ends: 19044 [2021-11-07 01:03:02,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19044 states. [2021-11-07 01:03:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19044 to 17527. [2021-11-07 01:03:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17527 states, 17526 states have (on average 1.331849823119936) internal successors, (23342), 17526 states have internal predecessors, (23342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17527 states to 17527 states and 23342 transitions. [2021-11-07 01:03:11,430 INFO L78 Accepts]: Start accepts. Automaton has 17527 states and 23342 transitions. Word has length 75 [2021-11-07 01:03:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:11,430 INFO L470 AbstractCegarLoop]: Abstraction has 17527 states and 23342 transitions. [2021-11-07 01:03:11,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17527 states and 23342 transitions. [2021-11-07 01:03:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:03:11,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:11,432 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:11,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 01:03:11,432 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:03:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:11,433 INFO L85 PathProgramCache]: Analyzing trace with hash 22124065, now seen corresponding path program 1 times [2021-11-07 01:03:11,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:11,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315687464] [2021-11-07 01:03:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:11,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:12,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:12,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315687464] [2021-11-07 01:03:12,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315687464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:12,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:12,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-07 01:03:12,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853740372] [2021-11-07 01:03:12,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 01:03:12,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:12,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 01:03:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:03:12,417 INFO L87 Difference]: Start difference. First operand 17527 states and 23342 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:32,835 INFO L93 Difference]: Finished difference Result 25850 states and 33973 transitions. [2021-11-07 01:03:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 01:03:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:03:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:32,868 INFO L225 Difference]: With dead ends: 25850 [2021-11-07 01:03:32,868 INFO L226 Difference]: Without dead ends: 24629 [2021-11-07 01:03:32,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=405, Invalid=2145, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 01:03:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24629 states. [2021-11-07 01:03:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24629 to 17545. [2021-11-07 01:03:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 1.3318513451892384) internal successors, (23366), 17544 states have internal predecessors, (23366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 23366 transitions. [2021-11-07 01:03:42,458 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 23366 transitions. Word has length 76 [2021-11-07 01:03:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:42,459 INFO L470 AbstractCegarLoop]: Abstraction has 17545 states and 23366 transitions. [2021-11-07 01:03:42,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 23366 transitions. [2021-11-07 01:03:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:03:42,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:42,461 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:42,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-07 01:03:42,461 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:03:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash 839549454, now seen corresponding path program 1 times [2021-11-07 01:03:42,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:42,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890367934] [2021-11-07 01:03:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:42,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:42,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:42,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890367934] [2021-11-07 01:03:42,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890367934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:42,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:42,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-07 01:03:42,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982436152] [2021-11-07 01:03:42,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:03:42,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:03:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:03:42,806 INFO L87 Difference]: Start difference. First operand 17545 states and 23366 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:15,593 INFO L93 Difference]: Finished difference Result 51119 states and 67422 transitions. [2021-11-07 01:04:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 01:04:15,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:04:15,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:15,657 INFO L225 Difference]: With dead ends: 51119 [2021-11-07 01:04:15,658 INFO L226 Difference]: Without dead ends: 49873 [2021-11-07 01:04:15,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:04:15,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49873 states. [2021-11-07 01:04:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49873 to 17519. [2021-11-07 01:04:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17519 states, 17518 states have (on average 1.3319442858773833) internal successors, (23333), 17518 states have internal predecessors, (23333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 23333 transitions. [2021-11-07 01:04:27,025 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 23333 transitions. Word has length 76 [2021-11-07 01:04:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:27,026 INFO L470 AbstractCegarLoop]: Abstraction has 17519 states and 23333 transitions. [2021-11-07 01:04:27,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 23333 transitions. [2021-11-07 01:04:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:04:27,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:27,028 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:27,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-07 01:04:27,029 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:04:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2124498390, now seen corresponding path program 1 times [2021-11-07 01:04:27,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:27,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913415247] [2021-11-07 01:04:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:27,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:27,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:27,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913415247] [2021-11-07 01:04:27,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913415247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:27,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:27,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:04:27,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179010254] [2021-11-07 01:04:27,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:04:27,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:27,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:04:27,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:04:27,272 INFO L87 Difference]: Start difference. First operand 17519 states and 23333 transitions. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:49,332 INFO L93 Difference]: Finished difference Result 32161 states and 42401 transitions. [2021-11-07 01:04:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:04:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2021-11-07 01:04:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:49,371 INFO L225 Difference]: With dead ends: 32161 [2021-11-07 01:04:49,371 INFO L226 Difference]: Without dead ends: 30925 [2021-11-07 01:04:49,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:04:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2021-11-07 01:05:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 17488. [2021-11-07 01:05:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17488 states, 17487 states have (on average 1.3319036998913478) internal successors, (23291), 17487 states have internal predecessors, (23291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17488 states to 17488 states and 23291 transitions. [2021-11-07 01:05:00,303 INFO L78 Accepts]: Start accepts. Automaton has 17488 states and 23291 transitions. Word has length 77 [2021-11-07 01:05:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:00,303 INFO L470 AbstractCegarLoop]: Abstraction has 17488 states and 23291 transitions. [2021-11-07 01:05:00,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 17488 states and 23291 transitions. [2021-11-07 01:05:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:05:00,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:00,305 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:00,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-07 01:05:00,306 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:05:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1376924740, now seen corresponding path program 1 times [2021-11-07 01:05:00,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:05:00,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485876551] [2021-11-07 01:05:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:00,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:05:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:00,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:05:00,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485876551] [2021-11-07 01:05:00,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485876551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:00,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:00,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:05:00,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519641863] [2021-11-07 01:05:00,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:05:00,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:05:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:05:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:05:00,435 INFO L87 Difference]: Start difference. First operand 17488 states and 23291 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)