./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0e4a14a6af4061d17c8fde5475e0f3a38fede87663f764ff2ccff752f7727295 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:49:25,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:49:25,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:49:26,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:49:26,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:49:26,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:49:26,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:49:26,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:49:26,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:49:26,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:49:26,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:49:26,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:49:26,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:49:26,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:49:26,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:49:26,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:49:26,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:49:26,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:49:26,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:49:26,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:49:26,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:49:26,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:49:26,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:49:26,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:49:26,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:49:26,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:49:26,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:49:26,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:49:26,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:49:26,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:49:26,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:49:26,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:49:26,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:49:26,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:49:26,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:49:26,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:49:26,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:49:26,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:49:26,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:49:26,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:49:26,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:49:26,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:49:26,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:49:26,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:49:26,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:49:26,108 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:49:26,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:49:26,109 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:49:26,109 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:49:26,109 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:49:26,109 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:49:26,110 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:49:26,110 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:49:26,110 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:49:26,110 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:49:26,110 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:49:26,111 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:49:26,111 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:49:26,111 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:49:26,111 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:49:26,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:49:26,112 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:49:26,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:49:26,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:49:26,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:49:26,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:49:26,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:49:26,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:49:26,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:49:26,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:49:26,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:49:26,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:49:26,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:49:26,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:49:26,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:49:26,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:49:26,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:49:26,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:49:26,133 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:49:26,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:49:26,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:49:26,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:49:26,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:49:26,134 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_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e4a14a6af4061d17c8fde5475e0f3a38fede87663f764ff2ccff752f7727295 [2021-11-21 01:49:26,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:49:26,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:49:26,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:49:26,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:49:26,384 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:49:26,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-21 01:49:26,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/data/f87d3d232/ec7bb60168d04b03896b9801a31c7250/FLAG7b20d7b1b [2021-11-21 01:49:27,037 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:49:27,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-21 01:49:27,052 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/data/f87d3d232/ec7bb60168d04b03896b9801a31c7250/FLAG7b20d7b1b [2021-11-21 01:49:27,305 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/data/f87d3d232/ec7bb60168d04b03896b9801a31c7250 [2021-11-21 01:49:27,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:49:27,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:49:27,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:49:27,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:49:27,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:49:27,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:49:27" (1/1) ... [2021-11-21 01:49:27,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a28180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:27, skipping insertion in model container [2021-11-21 01:49:27,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:49:27" (1/1) ... [2021-11-21 01:49:27,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:49:27,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:49:27,728 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13338,13351] [2021-11-21 01:49:27,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:49:27,895 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:49:28,012 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13338,13351] [2021-11-21 01:49:28,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:49:28,072 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:49:28,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28 WrapperNode [2021-11-21 01:49:28,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:49:28,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:49:28,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:49:28,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:49:28,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,194 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1328 [2021-11-21 01:49:28,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:49:28,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:49:28,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:49:28,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:49:28,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:49:28,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:49:28,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:49:28,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:49:28,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (1/1) ... [2021-11-21 01:49:28,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:49:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:49:28,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:49:28,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:49:28,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:49:28,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:49:28,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:49:28,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:49:28,491 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:49:28,493 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:49:29,537 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:49:29,888 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:49:29,888 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:49:29,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:49:29 BoogieIcfgContainer [2021-11-21 01:49:29,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:49:29,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:49:29,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:49:29,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:49:29,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:49:27" (1/3) ... [2021-11-21 01:49:29,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53702a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:49:29, skipping insertion in model container [2021-11-21 01:49:29,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:28" (2/3) ... [2021-11-21 01:49:29,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53702a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:49:29, skipping insertion in model container [2021-11-21 01:49:29,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:49:29" (3/3) ... [2021-11-21 01:49:29,901 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-21 01:49:29,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:49:29,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:49:29,957 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:49:29,964 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:49:29,964 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:49:29,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 263 states, 261 states have (on average 1.6781609195402298) internal successors, (438), 262 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-21 01:49:30,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:30,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:30,001 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1090069601, now seen corresponding path program 1 times [2021-11-21 01:49:30,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:30,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614371865] [2021-11-21 01:49:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:30,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:30,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:30,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614371865] [2021-11-21 01:49:30,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614371865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:30,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:30,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:30,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390003140] [2021-11-21 01:49:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:30,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:30,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:30,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:30,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:30,585 INFO L87 Difference]: Start difference. First operand has 263 states, 261 states have (on average 1.6781609195402298) internal successors, (438), 262 states have internal predecessors, (438), 0 states have call successors, (0), 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 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:30,820 INFO L93 Difference]: Finished difference Result 457 states and 755 transitions. [2021-11-21 01:49:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:49:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-21 01:49:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:30,845 INFO L225 Difference]: With dead ends: 457 [2021-11-21 01:49:30,846 INFO L226 Difference]: Without dead ends: 346 [2021-11-21 01:49:30,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:30,854 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 179 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:30,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 891 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-21 01:49:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2021-11-21 01:49:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.565597667638484) internal successors, (537), 343 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 537 transitions. [2021-11-21 01:49:30,962 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 537 transitions. Word has length 97 [2021-11-21 01:49:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:30,963 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 537 transitions. [2021-11-21 01:49:30,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 537 transitions. [2021-11-21 01:49:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-21 01:49:30,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:30,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:30,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:49:30,978 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:30,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1674285279, now seen corresponding path program 1 times [2021-11-21 01:49:30,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:30,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699924314] [2021-11-21 01:49:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:30,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:31,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699924314] [2021-11-21 01:49:31,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699924314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:31,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:31,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:31,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772873731] [2021-11-21 01:49:31,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:31,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:31,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:31,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:31,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:31,157 INFO L87 Difference]: Start difference. First operand 344 states and 537 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2021-11-21 01:49:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:31,325 INFO L93 Difference]: Finished difference Result 638 states and 1018 transitions. [2021-11-21 01:49:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:49:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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 [2021-11-21 01:49:31,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:31,334 INFO L225 Difference]: With dead ends: 638 [2021-11-21 01:49:31,334 INFO L226 Difference]: Without dead ends: 450 [2021-11-21 01:49:31,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:31,342 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 163 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:31,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 703 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-21 01:49:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2021-11-21 01:49:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.574944071588367) internal successors, (704), 447 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 704 transitions. [2021-11-21 01:49:31,364 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 704 transitions. Word has length 99 [2021-11-21 01:49:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:31,365 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 704 transitions. [2021-11-21 01:49:31,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2021-11-21 01:49:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 704 transitions. [2021-11-21 01:49:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-21 01:49:31,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:31,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:31,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:49:31,367 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash -142297425, now seen corresponding path program 1 times [2021-11-21 01:49:31,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:31,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854314671] [2021-11-21 01:49:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:31,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:31,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:31,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854314671] [2021-11-21 01:49:31,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854314671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:31,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:31,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:31,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661857259] [2021-11-21 01:49:31,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:31,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:31,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:31,503 INFO L87 Difference]: Start difference. First operand 448 states and 704 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:31,660 INFO L93 Difference]: Finished difference Result 968 states and 1553 transitions. [2021-11-21 01:49:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:49:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-21 01:49:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:31,668 INFO L225 Difference]: With dead ends: 968 [2021-11-21 01:49:31,668 INFO L226 Difference]: Without dead ends: 678 [2021-11-21 01:49:31,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:31,677 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 162 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:31,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 789 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-11-21 01:49:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2021-11-21 01:49:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 1.5925925925925926) internal successors, (1075), 675 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1075 transitions. [2021-11-21 01:49:31,720 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1075 transitions. Word has length 102 [2021-11-21 01:49:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:31,721 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 1075 transitions. [2021-11-21 01:49:31,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1075 transitions. [2021-11-21 01:49:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-21 01:49:31,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:31,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:31,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:49:31,733 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash -279143710, now seen corresponding path program 1 times [2021-11-21 01:49:31,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:31,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198565857] [2021-11-21 01:49:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:31,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:31,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:31,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198565857] [2021-11-21 01:49:31,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198565857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:31,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:31,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:31,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903863766] [2021-11-21 01:49:31,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:31,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:31,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:31,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:31,887 INFO L87 Difference]: Start difference. First operand 676 states and 1075 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:32,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:32,023 INFO L93 Difference]: Finished difference Result 1506 states and 2428 transitions. [2021-11-21 01:49:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:49:32,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-11-21 01:49:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:32,030 INFO L225 Difference]: With dead ends: 1506 [2021-11-21 01:49:32,030 INFO L226 Difference]: Without dead ends: 988 [2021-11-21 01:49:32,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:32,033 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 161 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:32,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 719 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-11-21 01:49:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 986. [2021-11-21 01:49:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.603045685279188) internal successors, (1579), 985 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1579 transitions. [2021-11-21 01:49:32,080 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1579 transitions. Word has length 104 [2021-11-21 01:49:32,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:32,080 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1579 transitions. [2021-11-21 01:49:32,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1579 transitions. [2021-11-21 01:49:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-21 01:49:32,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:32,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:32,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:49:32,083 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:32,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1390377617, now seen corresponding path program 1 times [2021-11-21 01:49:32,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:32,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145044582] [2021-11-21 01:49:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:32,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:32,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:32,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145044582] [2021-11-21 01:49:32,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145044582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:32,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:32,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:32,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743556703] [2021-11-21 01:49:32,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:32,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:32,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:32,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:32,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:32,174 INFO L87 Difference]: Start difference. First operand 986 states and 1579 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:32,372 INFO L93 Difference]: Finished difference Result 2418 states and 3912 transitions. [2021-11-21 01:49:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:49:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-11-21 01:49:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:32,383 INFO L225 Difference]: With dead ends: 2418 [2021-11-21 01:49:32,384 INFO L226 Difference]: Without dead ends: 1612 [2021-11-21 01:49:32,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:32,386 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 155 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:32,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 755 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-11-21 01:49:32,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1610. [2021-11-21 01:49:32,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 1.6078309509011808) internal successors, (2587), 1609 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2587 transitions. [2021-11-21 01:49:32,473 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2587 transitions. Word has length 107 [2021-11-21 01:49:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:32,474 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 2587 transitions. [2021-11-21 01:49:32,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:32,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2587 transitions. [2021-11-21 01:49:32,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-21 01:49:32,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:32,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:32,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:49:32,477 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:32,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1467977439, now seen corresponding path program 1 times [2021-11-21 01:49:32,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:32,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919618349] [2021-11-21 01:49:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:32,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:32,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:32,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919618349] [2021-11-21 01:49:32,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919618349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:32,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:32,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:32,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932536858] [2021-11-21 01:49:32,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:32,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:32,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:32,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:32,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:32,544 INFO L87 Difference]: Start difference. First operand 1610 states and 2587 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:32,767 INFO L93 Difference]: Finished difference Result 3868 states and 6259 transitions. [2021-11-21 01:49:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:49:32,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-11-21 01:49:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:32,782 INFO L225 Difference]: With dead ends: 3868 [2021-11-21 01:49:32,782 INFO L226 Difference]: Without dead ends: 2438 [2021-11-21 01:49:32,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:32,787 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 154 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:32,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 721 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-11-21 01:49:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2436. [2021-11-21 01:49:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 1.6123203285420944) internal successors, (3926), 2435 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 3926 transitions. [2021-11-21 01:49:32,935 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 3926 transitions. Word has length 109 [2021-11-21 01:49:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:32,936 INFO L470 AbstractCegarLoop]: Abstraction has 2436 states and 3926 transitions. [2021-11-21 01:49:32,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 3926 transitions. [2021-11-21 01:49:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-21 01:49:32,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:32,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:32,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:49:32,939 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1663052797, now seen corresponding path program 1 times [2021-11-21 01:49:32,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:32,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444695398] [2021-11-21 01:49:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:32,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:33,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444695398] [2021-11-21 01:49:33,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444695398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:33,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:33,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:33,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016833211] [2021-11-21 01:49:33,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:33,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:33,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:33,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:33,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:33,029 INFO L87 Difference]: Start difference. First operand 2436 states and 3926 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:33,400 INFO L93 Difference]: Finished difference Result 6364 states and 10291 transitions. [2021-11-21 01:49:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:49:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-11-21 01:49:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:33,427 INFO L225 Difference]: With dead ends: 6364 [2021-11-21 01:49:33,427 INFO L226 Difference]: Without dead ends: 4130 [2021-11-21 01:49:33,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:33,435 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 148 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:33,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 721 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4130 states. [2021-11-21 01:49:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4130 to 4128. [2021-11-21 01:49:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 1.607705354979404) internal successors, (6635), 4127 states have internal predecessors, (6635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 6635 transitions. [2021-11-21 01:49:33,712 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 6635 transitions. Word has length 112 [2021-11-21 01:49:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:33,713 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 6635 transitions. [2021-11-21 01:49:33,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 6635 transitions. [2021-11-21 01:49:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-21 01:49:33,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:33,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:33,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:49:33,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash -332455563, now seen corresponding path program 1 times [2021-11-21 01:49:33,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:33,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842586535] [2021-11-21 01:49:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:33,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:33,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842586535] [2021-11-21 01:49:33,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842586535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:33,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:33,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:33,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102089839] [2021-11-21 01:49:33,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:33,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:33,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:33,803 INFO L87 Difference]: Start difference. First operand 4128 states and 6635 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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) [2021-11-21 01:49:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:34,215 INFO L93 Difference]: Finished difference Result 10310 states and 16634 transitions. [2021-11-21 01:49:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:49:34,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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 [2021-11-21 01:49:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:34,253 INFO L225 Difference]: With dead ends: 10310 [2021-11-21 01:49:34,253 INFO L226 Difference]: Without dead ends: 6384 [2021-11-21 01:49:34,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:34,262 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 147 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:34,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 723 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:34,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-11-21 01:49:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 6382. [2021-11-21 01:49:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6382 states, 6381 states have (on average 1.6093088857545839) internal successors, (10269), 6381 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 10269 transitions. [2021-11-21 01:49:34,653 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 10269 transitions. Word has length 114 [2021-11-21 01:49:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:34,655 INFO L470 AbstractCegarLoop]: Abstraction has 6382 states and 10269 transitions. [2021-11-21 01:49:34,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 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) [2021-11-21 01:49:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 10269 transitions. [2021-11-21 01:49:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-21 01:49:34,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:34,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:34,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:49:34,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash 622188600, now seen corresponding path program 1 times [2021-11-21 01:49:34,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:34,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249305510] [2021-11-21 01:49:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:34,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:34,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:34,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249305510] [2021-11-21 01:49:34,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249305510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:34,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:34,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:49:34,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683499227] [2021-11-21 01:49:34,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:34,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:49:34,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:34,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:49:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:49:34,774 INFO L87 Difference]: Start difference. First operand 6382 states and 10269 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 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) [2021-11-21 01:49:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:35,744 INFO L93 Difference]: Finished difference Result 16006 states and 25762 transitions. [2021-11-21 01:49:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:49:35,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 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 [2021-11-21 01:49:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:35,802 INFO L225 Difference]: With dead ends: 16006 [2021-11-21 01:49:35,802 INFO L226 Difference]: Without dead ends: 9848 [2021-11-21 01:49:35,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:49:35,816 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 1268 mSDsluCounter, 3263 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:35,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 3525 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:49:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-21 01:49:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9834. [2021-11-21 01:49:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.6015458151123767) internal successors, (15748), 9833 states have internal predecessors, (15748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15748 transitions. [2021-11-21 01:49:36,361 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15748 transitions. Word has length 117 [2021-11-21 01:49:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:36,361 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15748 transitions. [2021-11-21 01:49:36,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 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) [2021-11-21 01:49:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15748 transitions. [2021-11-21 01:49:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-21 01:49:36,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:36,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:36,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:49:36,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:36,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2040915368, now seen corresponding path program 1 times [2021-11-21 01:49:36,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:36,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825154723] [2021-11-21 01:49:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:36,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:36,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:36,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825154723] [2021-11-21 01:49:36,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825154723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:36,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:36,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:49:36,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431147414] [2021-11-21 01:49:36,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:36,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:49:36,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:36,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:49:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:49:36,499 INFO L87 Difference]: Start difference. First operand 9834 states and 15748 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:37,069 INFO L93 Difference]: Finished difference Result 19446 states and 31165 transitions. [2021-11-21 01:49:37,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:49:37,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-11-21 01:49:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:37,097 INFO L225 Difference]: With dead ends: 19446 [2021-11-21 01:49:37,097 INFO L226 Difference]: Without dead ends: 9836 [2021-11-21 01:49:37,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:49:37,111 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 311 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:37,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1058 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-21 01:49:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-21 01:49:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.5980880707820604) internal successors, (15714), 9833 states have internal predecessors, (15714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15714 transitions. [2021-11-21 01:49:37,666 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15714 transitions. Word has length 118 [2021-11-21 01:49:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:37,667 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15714 transitions. [2021-11-21 01:49:37,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15714 transitions. [2021-11-21 01:49:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-21 01:49:37,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:37,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:37,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:49:37,670 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:37,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1218637057, now seen corresponding path program 1 times [2021-11-21 01:49:37,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:37,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954756045] [2021-11-21 01:49:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:37,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:37,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:37,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954756045] [2021-11-21 01:49:37,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954756045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:37,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:37,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:49:37,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357843378] [2021-11-21 01:49:37,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:37,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:49:37,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:49:37,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:49:37,744 INFO L87 Difference]: Start difference. First operand 9834 states and 15714 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:38,466 INFO L93 Difference]: Finished difference Result 19446 states and 31097 transitions. [2021-11-21 01:49:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:49:38,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-21 01:49:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:38,492 INFO L225 Difference]: With dead ends: 19446 [2021-11-21 01:49:38,493 INFO L226 Difference]: Without dead ends: 9836 [2021-11-21 01:49:38,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:49:38,505 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 319 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:38,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1064 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-21 01:49:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-21 01:49:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.594630326451744) internal successors, (15680), 9833 states have internal predecessors, (15680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15680 transitions. [2021-11-21 01:49:38,963 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15680 transitions. Word has length 119 [2021-11-21 01:49:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:38,964 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15680 transitions. [2021-11-21 01:49:38,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15680 transitions. [2021-11-21 01:49:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 01:49:38,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:38,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:38,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:49:38,967 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash 819010895, now seen corresponding path program 1 times [2021-11-21 01:49:38,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:38,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196244029] [2021-11-21 01:49:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:38,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:39,048 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:39,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196244029] [2021-11-21 01:49:39,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196244029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:39,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:39,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:49:39,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881142925] [2021-11-21 01:49:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:39,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:49:39,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:49:39,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:49:39,051 INFO L87 Difference]: Start difference. First operand 9834 states and 15680 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:39,640 INFO L93 Difference]: Finished difference Result 19446 states and 31029 transitions. [2021-11-21 01:49:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:49:39,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-11-21 01:49:39,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:39,665 INFO L225 Difference]: With dead ends: 19446 [2021-11-21 01:49:39,665 INFO L226 Difference]: Without dead ends: 9836 [2021-11-21 01:49:39,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:49:39,681 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 317 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:39,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1067 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-21 01:49:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-21 01:49:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.5911725821214278) internal successors, (15646), 9833 states have internal predecessors, (15646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15646 transitions. [2021-11-21 01:49:40,209 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15646 transitions. Word has length 120 [2021-11-21 01:49:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:40,209 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15646 transitions. [2021-11-21 01:49:40,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15646 transitions. [2021-11-21 01:49:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:49:40,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:40,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:40,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:49:40,212 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:40,212 INFO L85 PathProgramCache]: Analyzing trace with hash -433854010, now seen corresponding path program 1 times [2021-11-21 01:49:40,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:40,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638637014] [2021-11-21 01:49:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:40,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:40,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:40,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638637014] [2021-11-21 01:49:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638637014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:40,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:40,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:49:40,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371551929] [2021-11-21 01:49:40,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:40,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:49:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:40,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:49:40,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:49:40,272 INFO L87 Difference]: Start difference. First operand 9834 states and 15646 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:40,781 INFO L93 Difference]: Finished difference Result 19446 states and 30961 transitions. [2021-11-21 01:49:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:49:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-21 01:49:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:40,806 INFO L225 Difference]: With dead ends: 19446 [2021-11-21 01:49:40,806 INFO L226 Difference]: Without dead ends: 9836 [2021-11-21 01:49:40,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:49:40,821 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 315 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:40,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1070 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-21 01:49:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-21 01:49:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.5877148377911117) internal successors, (15612), 9833 states have internal predecessors, (15612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15612 transitions. [2021-11-21 01:49:41,353 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15612 transitions. Word has length 121 [2021-11-21 01:49:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:41,354 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15612 transitions. [2021-11-21 01:49:41,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:41,354 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15612 transitions. [2021-11-21 01:49:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-21 01:49:41,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:41,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:41,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:49:41,357 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:41,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1839181961, now seen corresponding path program 1 times [2021-11-21 01:49:41,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:41,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083106341] [2021-11-21 01:49:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:41,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:41,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:41,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083106341] [2021-11-21 01:49:41,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083106341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:41,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:41,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:49:41,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064557739] [2021-11-21 01:49:41,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:41,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:49:41,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:49:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:49:41,516 INFO L87 Difference]: Start difference. First operand 9834 states and 15612 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 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) [2021-11-21 01:49:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:42,352 INFO L93 Difference]: Finished difference Result 19446 states and 30893 transitions. [2021-11-21 01:49:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:49:42,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 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 [2021-11-21 01:49:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:42,378 INFO L225 Difference]: With dead ends: 19446 [2021-11-21 01:49:42,378 INFO L226 Difference]: Without dead ends: 9836 [2021-11-21 01:49:42,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:49:42,388 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 410 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:42,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1385 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:49:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-21 01:49:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-21 01:49:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.5860876639886097) internal successors, (15596), 9833 states have internal predecessors, (15596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15596 transitions. [2021-11-21 01:49:42,863 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15596 transitions. Word has length 123 [2021-11-21 01:49:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:42,863 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15596 transitions. [2021-11-21 01:49:42,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 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) [2021-11-21 01:49:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15596 transitions. [2021-11-21 01:49:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-21 01:49:42,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:42,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:42,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:49:42,866 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2074575841, now seen corresponding path program 1 times [2021-11-21 01:49:42,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:42,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955179889] [2021-11-21 01:49:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:42,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:43,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:43,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955179889] [2021-11-21 01:49:43,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955179889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:43,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:43,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:49:43,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981621339] [2021-11-21 01:49:43,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:43,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:49:43,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:43,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:49:43,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:49:43,026 INFO L87 Difference]: Start difference. First operand 9834 states and 15596 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2021-11-21 01:49:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:44,003 INFO L93 Difference]: Finished difference Result 24515 states and 38805 transitions. [2021-11-21 01:49:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:49:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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 [2021-11-21 01:49:44,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:44,035 INFO L225 Difference]: With dead ends: 24515 [2021-11-21 01:49:44,036 INFO L226 Difference]: Without dead ends: 14905 [2021-11-21 01:49:44,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:49:44,050 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 405 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:44,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1414 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:49:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14905 states. [2021-11-21 01:49:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14905 to 14903. [2021-11-21 01:49:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14903 states, 14902 states have (on average 1.5780432156757482) internal successors, (23516), 14902 states have internal predecessors, (23516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14903 states to 14903 states and 23516 transitions. [2021-11-21 01:49:44,823 INFO L78 Accepts]: Start accepts. Automaton has 14903 states and 23516 transitions. Word has length 126 [2021-11-21 01:49:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:44,823 INFO L470 AbstractCegarLoop]: Abstraction has 14903 states and 23516 transitions. [2021-11-21 01:49:44,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2021-11-21 01:49:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 14903 states and 23516 transitions. [2021-11-21 01:49:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 01:49:44,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:44,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:44,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:49:44,826 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash -79473702, now seen corresponding path program 1 times [2021-11-21 01:49:44,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750772130] [2021-11-21 01:49:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:44,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:44,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750772130] [2021-11-21 01:49:44,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750772130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:44,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:44,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:49:44,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114502171] [2021-11-21 01:49:44,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:44,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:49:44,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:49:44,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:49:44,999 INFO L87 Difference]: Start difference. First operand 14903 states and 23516 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:46,087 INFO L93 Difference]: Finished difference Result 18211 states and 28624 transitions. [2021-11-21 01:49:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:49:46,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-21 01:49:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:46,118 INFO L225 Difference]: With dead ends: 18211 [2021-11-21 01:49:46,119 INFO L226 Difference]: Without dead ends: 18209 [2021-11-21 01:49:46,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:49:46,128 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 449 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:46,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 2049 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:49:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18209 states. [2021-11-21 01:49:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18209 to 14917. [2021-11-21 01:49:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14917 states, 14916 states have (on average 1.5761598283722178) internal successors, (23510), 14916 states have internal predecessors, (23510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14917 states to 14917 states and 23510 transitions. [2021-11-21 01:49:46,980 INFO L78 Accepts]: Start accepts. Automaton has 14917 states and 23510 transitions. Word has length 127 [2021-11-21 01:49:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:46,980 INFO L470 AbstractCegarLoop]: Abstraction has 14917 states and 23510 transitions. [2021-11-21 01:49:46,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 14917 states and 23510 transitions. [2021-11-21 01:49:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:49:46,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:46,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:46,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:49:46,984 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1107902553, now seen corresponding path program 1 times [2021-11-21 01:49:46,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:46,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983160217] [2021-11-21 01:49:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:46,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:49:48,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:48,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983160217] [2021-11-21 01:49:48,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983160217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:49:48,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690321373] [2021-11-21 01:49:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:48,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:49:48,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:49:48,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:49:48,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:49:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:49:48,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:49:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:49:49,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:49:49,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690321373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:49,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:49:49,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2021-11-21 01:49:49,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545843692] [2021-11-21 01:49:49,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:49,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:49:49,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:49,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:49:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:49:49,270 INFO L87 Difference]: Start difference. First operand 14917 states and 23510 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 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) [2021-11-21 01:49:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:51,267 INFO L93 Difference]: Finished difference Result 43920 states and 69225 transitions. [2021-11-21 01:49:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:49:51,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 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 139 [2021-11-21 01:49:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:51,305 INFO L225 Difference]: With dead ends: 43920 [2021-11-21 01:49:51,305 INFO L226 Difference]: Without dead ends: 29224 [2021-11-21 01:49:51,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:49:51,316 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 944 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:51,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 724 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29224 states. [2021-11-21 01:49:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29224 to 29222. [2021-11-21 01:49:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29222 states, 29221 states have (on average 1.5718147907326923) internal successors, (45930), 29221 states have internal predecessors, (45930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29222 states to 29222 states and 45930 transitions. [2021-11-21 01:49:52,726 INFO L78 Accepts]: Start accepts. Automaton has 29222 states and 45930 transitions. Word has length 139 [2021-11-21 01:49:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:52,726 INFO L470 AbstractCegarLoop]: Abstraction has 29222 states and 45930 transitions. [2021-11-21 01:49:52,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 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) [2021-11-21 01:49:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 29222 states and 45930 transitions. [2021-11-21 01:49:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-21 01:49:52,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:52,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:52,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:49:52,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99905785-e0dc-4dec-a6e0-2ff38b2e1780/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:49:52,953 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:52,954 INFO L85 PathProgramCache]: Analyzing trace with hash 513106510, now seen corresponding path program 1 times [2021-11-21 01:49:52,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:52,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018386047] [2021-11-21 01:49:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:52,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:49:53,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:53,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018386047] [2021-11-21 01:49:53,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018386047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:53,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:53,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:53,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765520910] [2021-11-21 01:49:53,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:53,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:53,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:53,034 INFO L87 Difference]: Start difference. First operand 29222 states and 45930 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2021-11-21 01:49:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:54,908 INFO L93 Difference]: Finished difference Result 67784 states and 106804 transitions. [2021-11-21 01:49:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:49:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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 140 [2021-11-21 01:49:54,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:54,966 INFO L225 Difference]: With dead ends: 67784 [2021-11-21 01:49:54,966 INFO L226 Difference]: Without dead ends: 38935 [2021-11-21 01:49:54,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:54,987 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 148 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:54,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 728 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:49:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38935 states. [2021-11-21 01:49:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38935 to 38933. [2021-11-21 01:49:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38933 states, 38932 states have (on average 1.5630843522038427) internal successors, (60854), 38932 states have internal predecessors, (60854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38933 states to 38933 states and 60854 transitions. [2021-11-21 01:49:57,318 INFO L78 Accepts]: Start accepts. Automaton has 38933 states and 60854 transitions. Word has length 140 [2021-11-21 01:49:57,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:57,318 INFO L470 AbstractCegarLoop]: Abstraction has 38933 states and 60854 transitions. [2021-11-21 01:49:57,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2021-11-21 01:49:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 38933 states and 60854 transitions. [2021-11-21 01:49:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-21 01:49:57,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:57,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:57,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:49:57,322 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:57,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1151285517, now seen corresponding path program 1 times [2021-11-21 01:49:57,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:57,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980748406] [2021-11-21 01:49:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:57,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:49:57,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:57,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980748406] [2021-11-21 01:49:57,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980748406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:57,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:57,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:49:57,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898343198] [2021-11-21 01:49:57,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:57,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:49:57,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:49:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:49:57,395 INFO L87 Difference]: Start difference. First operand 38933 states and 60854 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 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) [2021-11-21 01:50:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:01,411 INFO L93 Difference]: Finished difference Result 114171 states and 178356 transitions. [2021-11-21 01:50:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:50:01,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 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 141 [2021-11-21 01:50:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:01,535 INFO L225 Difference]: With dead ends: 114171 [2021-11-21 01:50:01,535 INFO L226 Difference]: Without dead ends: 75326 [2021-11-21 01:50:01,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:50:01,569 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 273 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:01,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1035 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:50:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75326 states. [2021-11-21 01:50:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75326 to 75324. [2021-11-21 01:50:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75324 states, 75323 states have (on average 1.5551159672344437) internal successors, (117136), 75323 states have internal predecessors, (117136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75324 states to 75324 states and 117136 transitions. [2021-11-21 01:50:06,103 INFO L78 Accepts]: Start accepts. Automaton has 75324 states and 117136 transitions. Word has length 141 [2021-11-21 01:50:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:06,104 INFO L470 AbstractCegarLoop]: Abstraction has 75324 states and 117136 transitions. [2021-11-21 01:50:06,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 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) [2021-11-21 01:50:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 75324 states and 117136 transitions. [2021-11-21 01:50:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-21 01:50:06,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:06,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:06,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:50:06,108 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:50:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:06,109 INFO L85 PathProgramCache]: Analyzing trace with hash 596044324, now seen corresponding path program 1 times [2021-11-21 01:50:06,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:50:06,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722630691] [2021-11-21 01:50:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:06,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:50:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:50:06,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:50:06,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722630691] [2021-11-21 01:50:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722630691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:50:06,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:50:06,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:50:06,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361393294] [2021-11-21 01:50:06,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:50:06,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:50:06,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:50:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:50:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:50:06,155 INFO L87 Difference]: Start difference. First operand 75324 states and 117136 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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)