./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-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_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/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_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/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_1d3c79d1-d87d-4279-83c6-e2977332fe5a/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 38de1f601deff70f21f1ef1f0123eb0d7f517b820846e07815605162625b0305 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:06:07,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:06:07,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:06:07,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:06:07,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:06:07,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:06:07,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:06:07,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:06:07,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:06:07,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:06:07,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:06:07,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:06:07,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:06:07,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:06:07,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:06:07,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:06:07,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:06:07,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:06:07,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:06:07,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:06:07,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:06:07,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:06:07,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:06:07,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:06:07,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:06:07,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:06:07,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:06:07,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:06:07,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:06:07,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:06:07,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:06:07,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:06:07,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:06:07,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:06:07,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:06:07,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:06:07,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:06:07,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:06:07,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:06:07,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:06:07,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:06:07,891 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:06:07,919 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:06:07,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:06:07,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:06:07,921 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:06:07,922 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:06:07,922 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:06:07,922 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:06:07,922 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:06:07,922 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:06:07,923 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:06:07,923 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:06:07,923 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:06:07,923 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:06:07,923 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:06:07,924 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:06:07,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:06:07,925 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:06:07,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:06:07,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:06:07,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:06:07,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:06:07,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:06:07,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:06:07,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:06:07,926 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:06:07,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:06:07,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:06:07,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:06:07,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:06:07,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:06:07,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:06:07,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:06:07,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:06:07,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:06:07,928 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:06:07,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:06:07,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:06:07,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:06:07,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:06:07,929 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_1d3c79d1-d87d-4279-83c6-e2977332fe5a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38de1f601deff70f21f1ef1f0123eb0d7f517b820846e07815605162625b0305 [2021-11-07 01:06:08,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:06:08,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:06:08,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:06:08,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:06:08,214 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:06:08,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2021-11-07 01:06:08,289 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/data/f0ff650ac/64bcf81704b9455784842f468fc9c5d4/FLAGc132f0cd5 [2021-11-07 01:06:08,983 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:06:08,989 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2021-11-07 01:06:09,023 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/data/f0ff650ac/64bcf81704b9455784842f468fc9c5d4/FLAGc132f0cd5 [2021-11-07 01:06:09,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/data/f0ff650ac/64bcf81704b9455784842f468fc9c5d4 [2021-11-07 01:06:09,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:06:09,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:06:09,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:06:09,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:06:09,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:06:09,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:06:09" (1/1) ... [2021-11-07 01:06:09,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e23c758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:09, skipping insertion in model container [2021-11-07 01:06:09,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:06:09" (1/1) ... [2021-11-07 01:06:09,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:06:09,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:06:10,145 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_1d3c79d1-d87d-4279-83c6-e2977332fe5a/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2021-11-07 01:06:10,241 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_1d3c79d1-d87d-4279-83c6-e2977332fe5a/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2021-11-07 01:06:10,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:06:10,608 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:06:10,896 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_1d3c79d1-d87d-4279-83c6-e2977332fe5a/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2021-11-07 01:06:10,949 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_1d3c79d1-d87d-4279-83c6-e2977332fe5a/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2021-11-07 01:06:11,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:06:11,177 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:06:11,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11 WrapperNode [2021-11-07 01:06:11,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:06:11,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:06:11,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:06:11,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:06:11,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:06:11,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:06:11,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:06:11,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:06:11,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:06:11,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:06:11,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:06:11,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:06:11,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (1/1) ... [2021-11-07 01:06:11,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:06:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:06:11,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:06:11,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3c79d1-d87d-4279-83c6-e2977332fe5a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:06:11,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:06:11,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:06:11,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:06:11,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:06:19,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:06:19,960 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:06:19,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:06:19 BoogieIcfgContainer [2021-11-07 01:06:19,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:06:19,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:06:19,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:06:19,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:06:19,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:06:09" (1/3) ... [2021-11-07 01:06:19,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cb812e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:06:19, skipping insertion in model container [2021-11-07 01:06:19,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:06:11" (2/3) ... [2021-11-07 01:06:19,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cb812e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:06:19, skipping insertion in model container [2021-11-07 01:06:19,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:06:19" (3/3) ... [2021-11-07 01:06:19,982 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2021-11-07 01:06:19,994 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:06:19,994 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:06:20,052 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:06:20,059 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 01:06:20,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:06:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 737 states, 734 states have (on average 1.6362397820163488) internal successors, (1201), 736 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states 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 01:06:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:06:20,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:20,147 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:20,148 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash -437292113, now seen corresponding path program 1 times [2021-11-07 01:06:20,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:20,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79011620] [2021-11-07 01:06:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:20,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:20,964 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 01:06:20,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:20,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79011620] [2021-11-07 01:06:20,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79011620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:20,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:20,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:20,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664268544] [2021-11-07 01:06:20,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:20,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:20,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:20,999 INFO L87 Difference]: Start difference. First operand has 737 states, 734 states have (on average 1.6362397820163488) internal successors, (1201), 736 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 01:06:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:21,245 INFO L93 Difference]: Finished difference Result 1761 states and 2878 transitions. [2021-11-07 01:06:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:21,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 01:06:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:21,275 INFO L225 Difference]: With dead ends: 1761 [2021-11-07 01:06:21,275 INFO L226 Difference]: Without dead ends: 1158 [2021-11-07 01:06:21,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-11-07 01:06:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1154. [2021-11-07 01:06:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1152 states have (on average 1.6284722222222223) internal successors, (1876), 1153 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states 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 01:06:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1876 transitions. [2021-11-07 01:06:21,416 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1876 transitions. Word has length 99 [2021-11-07 01:06:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:21,417 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1876 transitions. [2021-11-07 01:06:21,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 01:06:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1876 transitions. [2021-11-07 01:06:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:06:21,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:21,425 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:21,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:06:21,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1456315218, now seen corresponding path program 1 times [2021-11-07 01:06:21,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:21,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494403176] [2021-11-07 01:06:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:21,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:21,647 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 01:06:21,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:21,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494403176] [2021-11-07 01:06:21,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494403176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:21,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:21,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:21,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422280129] [2021-11-07 01:06:21,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:21,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:21,656 INFO L87 Difference]: Start difference. First operand 1154 states and 1876 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:22,060 INFO L93 Difference]: Finished difference Result 2600 states and 4229 transitions. [2021-11-07 01:06:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:22,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-07 01:06:22,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:22,073 INFO L225 Difference]: With dead ends: 2600 [2021-11-07 01:06:22,074 INFO L226 Difference]: Without dead ends: 1585 [2021-11-07 01:06:22,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-11-07 01:06:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1581. [2021-11-07 01:06:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1579 states have (on average 1.6111462951234958) internal successors, (2544), 1580 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states 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 01:06:22,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2544 transitions. [2021-11-07 01:06:22,162 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2544 transitions. Word has length 105 [2021-11-07 01:06:22,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:22,162 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 2544 transitions. [2021-11-07 01:06:22,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2544 transitions. [2021-11-07 01:06:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:06:22,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:22,168 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:22,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:06:22,169 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:22,170 INFO L85 PathProgramCache]: Analyzing trace with hash -450266623, now seen corresponding path program 1 times [2021-11-07 01:06:22,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:22,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160684430] [2021-11-07 01:06:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:22,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:22,426 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 01:06:22,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:22,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160684430] [2021-11-07 01:06:22,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160684430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:22,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:22,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:22,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393661763] [2021-11-07 01:06:22,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:22,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:22,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:22,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:22,436 INFO L87 Difference]: Start difference. First operand 1581 states and 2544 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 01:06:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:22,682 INFO L93 Difference]: Finished difference Result 4068 states and 6562 transitions. [2021-11-07 01:06:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:22,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-11-07 01:06:22,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:22,704 INFO L225 Difference]: With dead ends: 4068 [2021-11-07 01:06:22,704 INFO L226 Difference]: Without dead ends: 2645 [2021-11-07 01:06:22,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2021-11-07 01:06:22,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2641. [2021-11-07 01:06:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2639 states have (on average 1.610458507010231) internal successors, (4250), 2640 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states 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 01:06:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4250 transitions. [2021-11-07 01:06:22,877 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4250 transitions. Word has length 108 [2021-11-07 01:06:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:22,878 INFO L470 AbstractCegarLoop]: Abstraction has 2641 states and 4250 transitions. [2021-11-07 01:06:22,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 01:06:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4250 transitions. [2021-11-07 01:06:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 01:06:22,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:22,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:22,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:06:22,887 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash -440725989, now seen corresponding path program 1 times [2021-11-07 01:06:22,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:22,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305954645] [2021-11-07 01:06:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:22,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:23,105 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 01:06:23,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:23,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305954645] [2021-11-07 01:06:23,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305954645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:23,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:23,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:23,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594437783] [2021-11-07 01:06:23,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:23,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:23,114 INFO L87 Difference]: Start difference. First operand 2641 states and 4250 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 01:06:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:23,436 INFO L93 Difference]: Finished difference Result 6304 states and 10156 transitions. [2021-11-07 01:06:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-11-07 01:06:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:23,462 INFO L225 Difference]: With dead ends: 6304 [2021-11-07 01:06:23,462 INFO L226 Difference]: Without dead ends: 3820 [2021-11-07 01:06:23,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2021-11-07 01:06:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 3816. [2021-11-07 01:06:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3814 states have (on average 1.6082852648138437) internal successors, (6134), 3815 states have internal predecessors, (6134), 0 states have call successors, (0), 0 states 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 01:06:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 6134 transitions. [2021-11-07 01:06:23,805 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 6134 transitions. Word has length 114 [2021-11-07 01:06:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:23,806 INFO L470 AbstractCegarLoop]: Abstraction has 3816 states and 6134 transitions. [2021-11-07 01:06:23,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 01:06:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 6134 transitions. [2021-11-07 01:06:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:06:23,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:23,814 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:23,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:06:23,814 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:23,815 INFO L85 PathProgramCache]: Analyzing trace with hash 376379404, now seen corresponding path program 1 times [2021-11-07 01:06:23,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:23,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378300517] [2021-11-07 01:06:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:23,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:24,061 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 01:06:24,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:24,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378300517] [2021-11-07 01:06:24,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378300517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:24,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:24,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:24,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357173919] [2021-11-07 01:06:24,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:24,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:24,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:24,067 INFO L87 Difference]: Start difference. First operand 3816 states and 6134 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 01:06:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:24,531 INFO L93 Difference]: Finished difference Result 10173 states and 16383 transitions. [2021-11-07 01:06:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-07 01:06:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:24,579 INFO L225 Difference]: With dead ends: 10173 [2021-11-07 01:06:24,580 INFO L226 Difference]: Without dead ends: 6533 [2021-11-07 01:06:24,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2021-11-07 01:06:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 6529. [2021-11-07 01:06:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6527 states have (on average 1.6053316990960624) internal successors, (10478), 6528 states have internal predecessors, (10478), 0 states have call successors, (0), 0 states 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 01:06:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 10478 transitions. [2021-11-07 01:06:25,168 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 10478 transitions. Word has length 117 [2021-11-07 01:06:25,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:25,170 INFO L470 AbstractCegarLoop]: Abstraction has 6529 states and 10478 transitions. [2021-11-07 01:06:25,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 01:06:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 10478 transitions. [2021-11-07 01:06:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 01:06:25,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:25,188 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:25,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:06:25,188 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash 132110001, now seen corresponding path program 1 times [2021-11-07 01:06:25,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:25,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057222892] [2021-11-07 01:06:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:25,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:25,438 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 01:06:25,438 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:25,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057222892] [2021-11-07 01:06:25,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057222892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:25,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:25,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:25,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945519211] [2021-11-07 01:06:25,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:25,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:25,453 INFO L87 Difference]: Start difference. First operand 6529 states and 10478 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 01:06:26,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:26,127 INFO L93 Difference]: Finished difference Result 16046 states and 25780 transitions. [2021-11-07 01:06:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:26,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-07 01:06:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:26,215 INFO L225 Difference]: With dead ends: 16046 [2021-11-07 01:06:26,215 INFO L226 Difference]: Without dead ends: 9692 [2021-11-07 01:06:26,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9692 states. [2021-11-07 01:06:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9692 to 9688. [2021-11-07 01:06:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9686 states have (on average 1.602828825108404) internal successors, (15525), 9687 states have internal predecessors, (15525), 0 states have call successors, (0), 0 states 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 01:06:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 15525 transitions. [2021-11-07 01:06:26,992 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 15525 transitions. Word has length 123 [2021-11-07 01:06:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:26,993 INFO L470 AbstractCegarLoop]: Abstraction has 9688 states and 15525 transitions. [2021-11-07 01:06:26,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 01:06:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 15525 transitions. [2021-11-07 01:06:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 01:06:27,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:27,011 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:27,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:06:27,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2120245380, now seen corresponding path program 1 times [2021-11-07 01:06:27,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:27,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006668401] [2021-11-07 01:06:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:27,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:27,244 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 01:06:27,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:27,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006668401] [2021-11-07 01:06:27,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006668401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:27,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:27,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:27,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105864416] [2021-11-07 01:06:27,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:27,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:27,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:27,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:27,248 INFO L87 Difference]: Start difference. First operand 9688 states and 15525 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 01:06:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:28,121 INFO L93 Difference]: Finished difference Result 26097 states and 41873 transitions. [2021-11-07 01:06:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-07 01:06:28,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:28,179 INFO L225 Difference]: With dead ends: 26097 [2021-11-07 01:06:28,180 INFO L226 Difference]: Without dead ends: 16603 [2021-11-07 01:06:28,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16603 states. [2021-11-07 01:06:29,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16603 to 16599. [2021-11-07 01:06:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16599 states, 16597 states have (on average 1.5975176236669277) internal successors, (26514), 16598 states have internal predecessors, (26514), 0 states have call successors, (0), 0 states 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 01:06:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16599 states to 16599 states and 26514 transitions. [2021-11-07 01:06:29,384 INFO L78 Accepts]: Start accepts. Automaton has 16599 states and 26514 transitions. Word has length 126 [2021-11-07 01:06:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:29,385 INFO L470 AbstractCegarLoop]: Abstraction has 16599 states and 26514 transitions. [2021-11-07 01:06:29,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 01:06:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 16599 states and 26514 transitions. [2021-11-07 01:06:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:06:29,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:29,412 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:29,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:06:29,413 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2013997458, now seen corresponding path program 1 times [2021-11-07 01:06:29,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:29,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505431519] [2021-11-07 01:06:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:29,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:29,556 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 01:06:29,556 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:29,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505431519] [2021-11-07 01:06:29,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505431519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:29,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:29,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:29,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611113741] [2021-11-07 01:06:29,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:29,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:29,559 INFO L87 Difference]: Start difference. First operand 16599 states and 26514 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 01:06:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:30,999 INFO L93 Difference]: Finished difference Result 41388 states and 66192 transitions. [2021-11-07 01:06:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:31,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-07 01:06:31,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:31,108 INFO L225 Difference]: With dead ends: 41388 [2021-11-07 01:06:31,109 INFO L226 Difference]: Without dead ends: 24982 [2021-11-07 01:06:31,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24982 states. [2021-11-07 01:06:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24982 to 24978. [2021-11-07 01:06:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24978 states, 24976 states have (on average 1.5948910954516335) internal successors, (39834), 24977 states have internal predecessors, (39834), 0 states have call successors, (0), 0 states 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 01:06:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24978 states to 24978 states and 39834 transitions. [2021-11-07 01:06:32,886 INFO L78 Accepts]: Start accepts. Automaton has 24978 states and 39834 transitions. Word has length 132 [2021-11-07 01:06:32,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:32,886 INFO L470 AbstractCegarLoop]: Abstraction has 24978 states and 39834 transitions. [2021-11-07 01:06:32,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 01:06:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 24978 states and 39834 transitions. [2021-11-07 01:06:32,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 01:06:32,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:32,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:32,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:06:32,924 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:32,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:32,925 INFO L85 PathProgramCache]: Analyzing trace with hash -644704025, now seen corresponding path program 1 times [2021-11-07 01:06:32,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:32,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353453922] [2021-11-07 01:06:32,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:32,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:33,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:33,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353453922] [2021-11-07 01:06:33,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353453922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:33,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:33,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:33,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749815915] [2021-11-07 01:06:33,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:33,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:33,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:33,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:33,126 INFO L87 Difference]: Start difference. First operand 24978 states and 39834 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 01:06:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:35,288 INFO L93 Difference]: Finished difference Result 62986 states and 100243 transitions. [2021-11-07 01:06:35,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:35,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-11-07 01:06:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:35,453 INFO L225 Difference]: With dead ends: 62986 [2021-11-07 01:06:35,453 INFO L226 Difference]: Without dead ends: 38214 [2021-11-07 01:06:35,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2021-11-07 01:06:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2021-11-07 01:06:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.5799832495812396) internal successors, (60368), 38209 states have internal predecessors, (60368), 0 states have call successors, (0), 0 states 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 01:06:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 60368 transitions. [2021-11-07 01:06:37,592 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 60368 transitions. Word has length 135 [2021-11-07 01:06:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:37,593 INFO L470 AbstractCegarLoop]: Abstraction has 38210 states and 60368 transitions. [2021-11-07 01:06:37,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 01:06:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 60368 transitions. [2021-11-07 01:06:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 01:06:37,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:37,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:37,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:06:37,646 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1518658920, now seen corresponding path program 1 times [2021-11-07 01:06:37,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:37,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366380873] [2021-11-07 01:06:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:37,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:37,830 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 01:06:37,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:37,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366380873] [2021-11-07 01:06:37,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366380873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:37,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:37,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:37,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675375909] [2021-11-07 01:06:37,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:37,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:37,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:37,834 INFO L87 Difference]: Start difference. First operand 38210 states and 60368 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 01:06:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:40,111 INFO L93 Difference]: Finished difference Result 76218 states and 120418 transitions. [2021-11-07 01:06:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:40,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-11-07 01:06:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:40,238 INFO L225 Difference]: With dead ends: 76218 [2021-11-07 01:06:40,238 INFO L226 Difference]: Without dead ends: 38214 [2021-11-07 01:06:40,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2021-11-07 01:06:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2021-11-07 01:06:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.575298366834171) internal successors, (60189), 38209 states have internal predecessors, (60189), 0 states have call successors, (0), 0 states 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 01:06:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 60189 transitions. [2021-11-07 01:06:42,217 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 60189 transitions. Word has length 136 [2021-11-07 01:06:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:42,218 INFO L470 AbstractCegarLoop]: Abstraction has 38210 states and 60189 transitions. [2021-11-07 01:06:42,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 01:06:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 60189 transitions. [2021-11-07 01:06:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:06:42,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:42,279 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:42,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:06:42,280 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -286827826, now seen corresponding path program 1 times [2021-11-07 01:06:42,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:42,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989167346] [2021-11-07 01:06:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:42,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:42,429 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 01:06:42,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:42,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989167346] [2021-11-07 01:06:42,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989167346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:42,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:42,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:42,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088344524] [2021-11-07 01:06:42,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:42,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:42,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:42,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:42,440 INFO L87 Difference]: Start difference. First operand 38210 states and 60189 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 01:06:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:44,620 INFO L93 Difference]: Finished difference Result 76218 states and 120061 transitions. [2021-11-07 01:06:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:44,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-11-07 01:06:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:44,734 INFO L225 Difference]: With dead ends: 76218 [2021-11-07 01:06:44,734 INFO L226 Difference]: Without dead ends: 38214 [2021-11-07 01:06:44,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2021-11-07 01:06:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2021-11-07 01:06:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.5706134840871022) internal successors, (60010), 38209 states have internal predecessors, (60010), 0 states have call successors, (0), 0 states 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 01:06:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 60010 transitions. [2021-11-07 01:06:46,870 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 60010 transitions. Word has length 137 [2021-11-07 01:06:46,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:46,871 INFO L470 AbstractCegarLoop]: Abstraction has 38210 states and 60010 transitions. [2021-11-07 01:06:46,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 01:06:46,871 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 60010 transitions. [2021-11-07 01:06:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 01:06:46,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:46,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:46,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:06:46,906 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:46,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1799859487, now seen corresponding path program 1 times [2021-11-07 01:06:46,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:46,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31267285] [2021-11-07 01:06:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:46,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:47,081 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 01:06:47,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:47,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31267285] [2021-11-07 01:06:47,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31267285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:47,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:47,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:47,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709416104] [2021-11-07 01:06:47,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:47,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:47,085 INFO L87 Difference]: Start difference. First operand 38210 states and 60010 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 01:06:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:49,337 INFO L93 Difference]: Finished difference Result 76218 states and 119704 transitions. [2021-11-07 01:06:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2021-11-07 01:06:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:49,423 INFO L225 Difference]: With dead ends: 76218 [2021-11-07 01:06:49,424 INFO L226 Difference]: Without dead ends: 38214 [2021-11-07 01:06:49,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2021-11-07 01:06:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2021-11-07 01:06:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.5659286013400335) internal successors, (59831), 38209 states have internal predecessors, (59831), 0 states have call successors, (0), 0 states 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 01:06:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 59831 transitions. [2021-11-07 01:06:51,811 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 59831 transitions. Word has length 138 [2021-11-07 01:06:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:51,811 INFO L470 AbstractCegarLoop]: Abstraction has 38210 states and 59831 transitions. [2021-11-07 01:06:51,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 01:06:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 59831 transitions. [2021-11-07 01:06:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 01:06:51,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:51,833 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:51,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:06:51,834 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:51,835 INFO L85 PathProgramCache]: Analyzing trace with hash 322318517, now seen corresponding path program 1 times [2021-11-07 01:06:51,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:51,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496189034] [2021-11-07 01:06:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:51,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:51,971 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 01:06:51,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:51,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496189034] [2021-11-07 01:06:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496189034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:51,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:51,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:51,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062145153] [2021-11-07 01:06:51,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:51,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:51,974 INFO L87 Difference]: Start difference. First operand 38210 states and 59831 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 01:06:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:54,144 INFO L93 Difference]: Finished difference Result 76218 states and 119347 transitions. [2021-11-07 01:06:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:54,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-07 01:06:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:54,212 INFO L225 Difference]: With dead ends: 76218 [2021-11-07 01:06:54,212 INFO L226 Difference]: Without dead ends: 38214 [2021-11-07 01:06:54,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2021-11-07 01:06:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2021-11-07 01:06:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.5612437185929648) internal successors, (59652), 38209 states have internal predecessors, (59652), 0 states have call successors, (0), 0 states 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 01:06:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 59652 transitions. [2021-11-07 01:06:56,262 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 59652 transitions. Word has length 139 [2021-11-07 01:06:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:56,263 INFO L470 AbstractCegarLoop]: Abstraction has 38210 states and 59652 transitions. [2021-11-07 01:06:56,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 01:06:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 59652 transitions. [2021-11-07 01:06:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 01:06:56,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:56,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:56,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:06:56,289 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:56,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1893329521, now seen corresponding path program 1 times [2021-11-07 01:06:56,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:56,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62835124] [2021-11-07 01:06:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:56,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:56,485 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 01:06:56,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:56,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62835124] [2021-11-07 01:06:56,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62835124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:56,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:56,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:06:56,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938163263] [2021-11-07 01:06:56,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:56,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:56,489 INFO L87 Difference]: Start difference. First operand 38210 states and 59652 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 01:06:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:59,083 INFO L93 Difference]: Finished difference Result 76218 states and 118990 transitions. [2021-11-07 01:06:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:59,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2021-11-07 01:06:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:59,147 INFO L225 Difference]: With dead ends: 76218 [2021-11-07 01:06:59,148 INFO L226 Difference]: Without dead ends: 38214 [2021-11-07 01:06:59,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2021-11-07 01:07:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2021-11-07 01:07:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.5590975711892798) internal successors, (59570), 38209 states have internal predecessors, (59570), 0 states have call successors, (0), 0 states 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 01:07:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 59570 transitions. [2021-11-07 01:07:01,351 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 59570 transitions. Word has length 141 [2021-11-07 01:07:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:01,351 INFO L470 AbstractCegarLoop]: Abstraction has 38210 states and 59570 transitions. [2021-11-07 01:07:01,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 01:07:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 59570 transitions. [2021-11-07 01:07:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 01:07:01,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:01,389 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:07:01,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:07:01,390 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:07:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:01,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1633615460, now seen corresponding path program 1 times [2021-11-07 01:07:01,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:07:01,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729783919] [2021-11-07 01:07:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:01,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:07:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:01,547 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 01:07:01,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:07:01,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729783919] [2021-11-07 01:07:01,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729783919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:01,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:01,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:07:01,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993017711] [2021-11-07 01:07:01,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:07:01,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:07:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:07:01,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:07:01,550 INFO L87 Difference]: Start difference. First operand 38210 states and 59570 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 01:07:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:04,824 INFO L93 Difference]: Finished difference Result 95357 states and 147973 transitions. [2021-11-07 01:07:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:07:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2021-11-07 01:07:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:04,997 INFO L225 Difference]: With dead ends: 95357 [2021-11-07 01:07:04,997 INFO L226 Difference]: Without dead ends: 57353 [2021-11-07 01:07:05,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:07:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57353 states. [2021-11-07 01:07:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57353 to 57349. [2021-11-07 01:07:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57349 states, 57347 states have (on average 1.5448759307374405) internal successors, (88594), 57348 states have internal predecessors, (88594), 0 states have call successors, (0), 0 states 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 01:07:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57349 states to 57349 states and 88594 transitions. [2021-11-07 01:07:08,449 INFO L78 Accepts]: Start accepts. Automaton has 57349 states and 88594 transitions. Word has length 144 [2021-11-07 01:07:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:08,449 INFO L470 AbstractCegarLoop]: Abstraction has 57349 states and 88594 transitions. [2021-11-07 01:07:08,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 01:07:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 57349 states and 88594 transitions. [2021-11-07 01:07:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 01:07:08,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:08,477 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:07:08,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:07:08,477 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:07:08,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:08,478 INFO L85 PathProgramCache]: Analyzing trace with hash -518659826, now seen corresponding path program 1 times [2021-11-07 01:07:08,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:07:08,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428513013] [2021-11-07 01:07:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:08,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:07:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:09,562 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 01:07:09,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:07:09,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428513013] [2021-11-07 01:07:09,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428513013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:09,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:09,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 01:07:09,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408746204] [2021-11-07 01:07:09,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:07:09,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:07:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:07:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:07:09,568 INFO L87 Difference]: Start difference. First operand 57349 states and 88594 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 01:07:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:14,538 INFO L93 Difference]: Finished difference Result 109652 states and 170399 transitions. [2021-11-07 01:07:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:07:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-11-07 01:07:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:14,698 INFO L225 Difference]: With dead ends: 109652 [2021-11-07 01:07:14,698 INFO L226 Difference]: Without dead ends: 74045 [2021-11-07 01:07:14,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:07:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74045 states.