./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH --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 e22fd4a52371acb4b873b206639f8f51f7518d2778c43044aaff0b323ebca998 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:45:18,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:45:18,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:45:19,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:45:19,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:45:19,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:45:19,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:45:19,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:45:19,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:45:19,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:45:19,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:45:19,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:45:19,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:45:19,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:45:19,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:45:19,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:45:19,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:45:19,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:45:19,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:45:19,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:45:19,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:45:19,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:45:19,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:45:19,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:45:19,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:45:19,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:45:19,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:45:19,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:45:19,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:45:19,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:45:19,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:45:19,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:45:19,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:45:19,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:45:19,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:45:19,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:45:19,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:45:19,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:45:19,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:45:19,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:45:19,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:45:19,101 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:45:19,144 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:45:19,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:45:19,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:45:19,146 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:45:19,147 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:45:19,147 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:45:19,147 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:45:19,148 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:45:19,154 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:45:19,154 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:45:19,156 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:45:19,156 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:45:19,156 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:45:19,157 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:45:19,157 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:45:19,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:45:19,158 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:45:19,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:45:19,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:45:19,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:45:19,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:45:19,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:45:19,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:45:19,160 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:45:19,161 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:45:19,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:45:19,161 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:45:19,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:45:19,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:45:19,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:45:19,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:45:19,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:45:19,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:45:19,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:45:19,165 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:45:19,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:45:19,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:45:19,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:45:19,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:45:19,166 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_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e22fd4a52371acb4b873b206639f8f51f7518d2778c43044aaff0b323ebca998 [2021-11-03 03:45:19,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:45:19,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:45:19,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:45:19,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:45:19,463 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:45:19,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-03 03:45:19,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/data/351ad7beb/59b361248e974ad081c7b7e58e0489e7/FLAG8475e3f0d [2021-11-03 03:45:20,316 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:45:20,317 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-03 03:45:20,345 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/data/351ad7beb/59b361248e974ad081c7b7e58e0489e7/FLAG8475e3f0d [2021-11-03 03:45:20,500 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/data/351ad7beb/59b361248e974ad081c7b7e58e0489e7 [2021-11-03 03:45:20,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:45:20,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:45:20,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:45:20,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:45:20,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:45:20,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:20" (1/1) ... [2021-11-03 03:45:20,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56846cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:20, skipping insertion in model container [2021-11-03 03:45:20,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:20" (1/1) ... [2021-11-03 03:45:20,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:45:20,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:45:21,064 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[22084,22097] [2021-11-03 03:45:21,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:45:21,273 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:45:21,560 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[22084,22097] [2021-11-03 03:45:21,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:45:21,755 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:45:21,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21 WrapperNode [2021-11-03 03:45:21,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:45:21,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:45:21,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:45:21,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:45:21,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:21,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:21,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:45:21,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:45:21,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:45:21,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:45:21,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:21,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:21,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:21,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:21,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:21,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:21,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:22,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:45:22,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:45:22,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:45:22,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:45:22,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (1/1) ... [2021-11-03 03:45:22,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:45:22,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:22,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:45:22,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d71a830-7d10-4cdf-8c0a-ea9ccc959cca/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:45:22,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:45:22,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:45:22,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:45:22,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:45:25,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:45:25,615 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 03:45:25,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:25 BoogieIcfgContainer [2021-11-03 03:45:25,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:45:25,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:45:25,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:45:25,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:45:25,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:45:20" (1/3) ... [2021-11-03 03:45:25,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc2ec07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:25, skipping insertion in model container [2021-11-03 03:45:25,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:21" (2/3) ... [2021-11-03 03:45:25,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc2ec07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:25, skipping insertion in model container [2021-11-03 03:45:25,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:25" (3/3) ... [2021-11-03 03:45:25,631 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-03 03:45:25,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:45:25,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:45:25,697 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:45:25,703 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 [2021-11-03 03:45:25,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:45:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 618 states, 616 states have (on average 1.724025974025974) internal successors, (1062), 617 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-03 03:45:25,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:25,769 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:25,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash 434937793, now seen corresponding path program 1 times [2021-11-03 03:45:25,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:25,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487148732] [2021-11-03 03:45:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:25,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:26,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:26,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487148732] [2021-11-03 03:45:26,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487148732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:26,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:26,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:26,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161213072] [2021-11-03 03:45:26,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:26,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:26,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:26,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:26,552 INFO L87 Difference]: Start difference. First operand has 618 states, 616 states have (on average 1.724025974025974) internal successors, (1062), 617 states have internal predecessors, (1062), 0 states have call successors, (0), 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 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:26,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:26,694 INFO L93 Difference]: Finished difference Result 868 states and 1465 transitions. [2021-11-03 03:45:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:26,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 193 [2021-11-03 03:45:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:26,724 INFO L225 Difference]: With dead ends: 868 [2021-11-03 03:45:26,725 INFO L226 Difference]: Without dead ends: 728 [2021-11-03 03:45:26,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-03 03:45:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2021-11-03 03:45:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.623448275862069) internal successors, (1177), 725 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1177 transitions. [2021-11-03 03:45:26,856 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1177 transitions. Word has length 193 [2021-11-03 03:45:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:26,858 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1177 transitions. [2021-11-03 03:45:26,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1177 transitions. [2021-11-03 03:45:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-03 03:45:26,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:26,865 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:26,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:45:26,865 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:26,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:26,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1094162337, now seen corresponding path program 1 times [2021-11-03 03:45:26,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:26,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47130423] [2021-11-03 03:45:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:26,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:27,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:27,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47130423] [2021-11-03 03:45:27,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47130423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:27,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:27,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:27,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093489571] [2021-11-03 03:45:27,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:27,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:27,082 INFO L87 Difference]: Start difference. First operand 726 states and 1177 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:27,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:27,156 INFO L93 Difference]: Finished difference Result 1105 states and 1788 transitions. [2021-11-03 03:45:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:27,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 195 [2021-11-03 03:45:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:27,165 INFO L225 Difference]: With dead ends: 1105 [2021-11-03 03:45:27,165 INFO L226 Difference]: Without dead ends: 861 [2021-11-03 03:45:27,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-11-03 03:45:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 859. [2021-11-03 03:45:27,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 1.6177156177156178) internal successors, (1388), 858 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1388 transitions. [2021-11-03 03:45:27,226 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1388 transitions. Word has length 195 [2021-11-03 03:45:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:27,228 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1388 transitions. [2021-11-03 03:45:27,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1388 transitions. [2021-11-03 03:45:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-03 03:45:27,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:27,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:27,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 03:45:27,234 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:27,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:27,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2125375804, now seen corresponding path program 1 times [2021-11-03 03:45:27,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:27,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878965702] [2021-11-03 03:45:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:27,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:27,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:27,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878965702] [2021-11-03 03:45:27,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878965702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:27,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:27,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:27,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448213664] [2021-11-03 03:45:27,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:27,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:27,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:27,527 INFO L87 Difference]: Start difference. First operand 859 states and 1388 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:27,584 INFO L93 Difference]: Finished difference Result 1543 states and 2491 transitions. [2021-11-03 03:45:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 199 [2021-11-03 03:45:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:27,595 INFO L225 Difference]: With dead ends: 1543 [2021-11-03 03:45:27,595 INFO L226 Difference]: Without dead ends: 1168 [2021-11-03 03:45:27,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-11-03 03:45:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1166. [2021-11-03 03:45:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 1.6163090128755364) internal successors, (1883), 1165 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1883 transitions. [2021-11-03 03:45:27,648 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1883 transitions. Word has length 199 [2021-11-03 03:45:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:27,649 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 1883 transitions. [2021-11-03 03:45:27,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1883 transitions. [2021-11-03 03:45:27,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-03 03:45:27,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:27,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:27,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 03:45:27,654 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash -52023740, now seen corresponding path program 1 times [2021-11-03 03:45:27,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:27,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849491194] [2021-11-03 03:45:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:27,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:27,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:27,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849491194] [2021-11-03 03:45:27,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849491194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:27,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:27,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:27,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555472150] [2021-11-03 03:45:27,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:27,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:27,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:27,831 INFO L87 Difference]: Start difference. First operand 1166 states and 1883 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:27,908 INFO L93 Difference]: Finished difference Result 2246 states and 3621 transitions. [2021-11-03 03:45:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:27,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2021-11-03 03:45:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:27,919 INFO L225 Difference]: With dead ends: 2246 [2021-11-03 03:45:27,919 INFO L226 Difference]: Without dead ends: 1564 [2021-11-03 03:45:27,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-11-03 03:45:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1562. [2021-11-03 03:45:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 1.6130685458039717) internal successors, (2518), 1561 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2518 transitions. [2021-11-03 03:45:28,035 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2518 transitions. Word has length 201 [2021-11-03 03:45:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:28,036 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 2518 transitions. [2021-11-03 03:45:28,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2518 transitions. [2021-11-03 03:45:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-03 03:45:28,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:28,042 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:28,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 03:45:28,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1574908601, now seen corresponding path program 1 times [2021-11-03 03:45:28,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:28,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735421821] [2021-11-03 03:45:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:28,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:28,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:28,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735421821] [2021-11-03 03:45:28,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735421821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:28,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:28,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:28,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066077373] [2021-11-03 03:45:28,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:28,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:28,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:28,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:28,221 INFO L87 Difference]: Start difference. First operand 1562 states and 2518 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:28,335 INFO L93 Difference]: Finished difference Result 3474 states and 5601 transitions. [2021-11-03 03:45:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:28,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 205 [2021-11-03 03:45:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:28,351 INFO L225 Difference]: With dead ends: 3474 [2021-11-03 03:45:28,351 INFO L226 Difference]: Without dead ends: 2419 [2021-11-03 03:45:28,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-11-03 03:45:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2417. [2021-11-03 03:45:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 1.6109271523178808) internal successors, (3892), 2416 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 3892 transitions. [2021-11-03 03:45:28,491 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 3892 transitions. Word has length 205 [2021-11-03 03:45:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:28,491 INFO L470 AbstractCegarLoop]: Abstraction has 2417 states and 3892 transitions. [2021-11-03 03:45:28,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 3892 transitions. [2021-11-03 03:45:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-03 03:45:28,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:28,496 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:28,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 03:45:28,497 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2029300548, now seen corresponding path program 1 times [2021-11-03 03:45:28,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:28,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422895656] [2021-11-03 03:45:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:28,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:28,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:28,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422895656] [2021-11-03 03:45:28,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422895656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:28,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:28,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:28,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028597252] [2021-11-03 03:45:28,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:28,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:28,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:28,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:28,666 INFO L87 Difference]: Start difference. First operand 2417 states and 3892 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:28,850 INFO L93 Difference]: Finished difference Result 5405 states and 8699 transitions. [2021-11-03 03:45:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2021-11-03 03:45:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:28,873 INFO L225 Difference]: With dead ends: 5405 [2021-11-03 03:45:28,873 INFO L226 Difference]: Without dead ends: 3495 [2021-11-03 03:45:28,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-11-03 03:45:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 3493. [2021-11-03 03:45:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 3492 states have (on average 1.6082474226804124) internal successors, (5616), 3492 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5616 transitions. [2021-11-03 03:45:29,143 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5616 transitions. Word has length 207 [2021-11-03 03:45:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:29,144 INFO L470 AbstractCegarLoop]: Abstraction has 3493 states and 5616 transitions. [2021-11-03 03:45:29,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5616 transitions. [2021-11-03 03:45:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-03 03:45:29,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:29,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:29,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 03:45:29,149 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:29,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:29,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1012002657, now seen corresponding path program 1 times [2021-11-03 03:45:29,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:29,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716613580] [2021-11-03 03:45:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:29,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:29,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:29,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716613580] [2021-11-03 03:45:29,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716613580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:29,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:29,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:29,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047733303] [2021-11-03 03:45:29,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:29,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:29,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:29,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:29,322 INFO L87 Difference]: Start difference. First operand 3493 states and 5616 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:29,673 INFO L93 Difference]: Finished difference Result 8825 states and 14195 transitions. [2021-11-03 03:45:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:29,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 211 [2021-11-03 03:45:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:29,708 INFO L225 Difference]: With dead ends: 8825 [2021-11-03 03:45:29,709 INFO L226 Difference]: Without dead ends: 5862 [2021-11-03 03:45:29,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-11-03 03:45:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5860. [2021-11-03 03:45:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5860 states, 5859 states have (on average 1.6052227342549923) internal successors, (9405), 5859 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5860 states to 5860 states and 9405 transitions. [2021-11-03 03:45:30,071 INFO L78 Accepts]: Start accepts. Automaton has 5860 states and 9405 transitions. Word has length 211 [2021-11-03 03:45:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:30,072 INFO L470 AbstractCegarLoop]: Abstraction has 5860 states and 9405 transitions. [2021-11-03 03:45:30,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 5860 states and 9405 transitions. [2021-11-03 03:45:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-03 03:45:30,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:30,076 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:30,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 03:45:30,077 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash -738789933, now seen corresponding path program 1 times [2021-11-03 03:45:30,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:30,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991960145] [2021-11-03 03:45:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:30,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:30,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:30,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991960145] [2021-11-03 03:45:30,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991960145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:30,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:30,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:30,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970442553] [2021-11-03 03:45:30,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:30,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:30,235 INFO L87 Difference]: Start difference. First operand 5860 states and 9405 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:30,665 INFO L93 Difference]: Finished difference Result 14176 states and 22753 transitions. [2021-11-03 03:45:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:30,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2021-11-03 03:45:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:30,722 INFO L225 Difference]: With dead ends: 14176 [2021-11-03 03:45:30,722 INFO L226 Difference]: Without dead ends: 8846 [2021-11-03 03:45:30,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8846 states. [2021-11-03 03:45:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8846 to 8844. [2021-11-03 03:45:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8844 states, 8843 states have (on average 1.6028497116363225) internal successors, (14174), 8843 states have internal predecessors, (14174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8844 states to 8844 states and 14174 transitions. [2021-11-03 03:45:31,313 INFO L78 Accepts]: Start accepts. Automaton has 8844 states and 14174 transitions. Word has length 213 [2021-11-03 03:45:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:31,314 INFO L470 AbstractCegarLoop]: Abstraction has 8844 states and 14174 transitions. [2021-11-03 03:45:31,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 8844 states and 14174 transitions. [2021-11-03 03:45:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-03 03:45:31,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:31,319 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:31,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 03:45:31,319 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash 448915862, now seen corresponding path program 1 times [2021-11-03 03:45:31,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:31,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991524271] [2021-11-03 03:45:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:31,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:31,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:31,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991524271] [2021-11-03 03:45:31,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991524271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:31,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:31,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:31,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018731630] [2021-11-03 03:45:31,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:31,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:31,464 INFO L87 Difference]: Start difference. First operand 8844 states and 14174 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:32,350 INFO L93 Difference]: Finished difference Result 23644 states and 37909 transitions. [2021-11-03 03:45:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:32,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2021-11-03 03:45:32,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:32,401 INFO L225 Difference]: With dead ends: 23644 [2021-11-03 03:45:32,402 INFO L226 Difference]: Without dead ends: 15353 [2021-11-03 03:45:32,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15353 states. [2021-11-03 03:45:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15353 to 15351. [2021-11-03 03:45:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15351 states, 15350 states have (on average 1.598827361563518) internal successors, (24542), 15350 states have internal predecessors, (24542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15351 states to 15351 states and 24542 transitions. [2021-11-03 03:45:33,412 INFO L78 Accepts]: Start accepts. Automaton has 15351 states and 24542 transitions. Word has length 217 [2021-11-03 03:45:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:33,413 INFO L470 AbstractCegarLoop]: Abstraction has 15351 states and 24542 transitions. [2021-11-03 03:45:33,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 15351 states and 24542 transitions. [2021-11-03 03:45:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-03 03:45:33,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:33,418 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:33,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 03:45:33,419 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1811518115, now seen corresponding path program 1 times [2021-11-03 03:45:33,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:33,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121627470] [2021-11-03 03:45:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:33,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:33,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:33,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121627470] [2021-11-03 03:45:33,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121627470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:33,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:33,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:33,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765670434] [2021-11-03 03:45:33,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:33,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:33,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:33,556 INFO L87 Difference]: Start difference. First operand 15351 states and 24542 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:34,842 INFO L93 Difference]: Finished difference Result 38463 states and 61515 transitions. [2021-11-03 03:45:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:34,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 219 [2021-11-03 03:45:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:34,917 INFO L225 Difference]: With dead ends: 38463 [2021-11-03 03:45:34,918 INFO L226 Difference]: Without dead ends: 23665 [2021-11-03 03:45:34,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:34,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23665 states. [2021-11-03 03:45:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23665 to 23663. [2021-11-03 03:45:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23663 states, 23662 states have (on average 1.5966528611275463) internal successors, (37780), 23662 states have internal predecessors, (37780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23663 states to 23663 states and 37780 transitions. [2021-11-03 03:45:36,388 INFO L78 Accepts]: Start accepts. Automaton has 23663 states and 37780 transitions. Word has length 219 [2021-11-03 03:45:36,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:36,389 INFO L470 AbstractCegarLoop]: Abstraction has 23663 states and 37780 transitions. [2021-11-03 03:45:36,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 23663 states and 37780 transitions. [2021-11-03 03:45:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-03 03:45:36,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:36,393 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:36,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 03:45:36,394 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:36,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1625652038, now seen corresponding path program 1 times [2021-11-03 03:45:36,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:36,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029994679] [2021-11-03 03:45:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:36,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:36,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:36,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029994679] [2021-11-03 03:45:36,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029994679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:36,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:36,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:45:36,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072581868] [2021-11-03 03:45:36,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:45:36,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:36,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:45:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:45:36,547 INFO L87 Difference]: Start difference. First operand 23663 states and 37780 transitions. Second operand has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:38,859 INFO L93 Difference]: Finished difference Result 58385 states and 93017 transitions. [2021-11-03 03:45:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:45:38,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 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 223 [2021-11-03 03:45:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:38,969 INFO L225 Difference]: With dead ends: 58385 [2021-11-03 03:45:38,969 INFO L226 Difference]: Without dead ends: 35298 [2021-11-03 03:45:39,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-03 03:45:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35298 states. [2021-11-03 03:45:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35298 to 35280. [2021-11-03 03:45:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35280 states, 35279 states have (on average 1.5861560701833952) internal successors, (55958), 35279 states have internal predecessors, (55958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 55958 transitions. [2021-11-03 03:45:40,851 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 55958 transitions. Word has length 223 [2021-11-03 03:45:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:40,851 INFO L470 AbstractCegarLoop]: Abstraction has 35280 states and 55958 transitions. [2021-11-03 03:45:40,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 55958 transitions. [2021-11-03 03:45:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-03 03:45:40,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:40,856 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:40,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 03:45:40,857 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:40,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1072774625, now seen corresponding path program 1 times [2021-11-03 03:45:40,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:40,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136121518] [2021-11-03 03:45:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:40,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:41,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:41,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136121518] [2021-11-03 03:45:41,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136121518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:41,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:41,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:45:41,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701886223] [2021-11-03 03:45:41,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:45:41,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:41,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:45:41,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:45:41,004 INFO L87 Difference]: Start difference. First operand 35280 states and 55958 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:42,433 INFO L93 Difference]: Finished difference Result 69986 states and 110993 transitions. [2021-11-03 03:45:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:45:42,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2021-11-03 03:45:42,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:42,519 INFO L225 Difference]: With dead ends: 69986 [2021-11-03 03:45:42,519 INFO L226 Difference]: Without dead ends: 35282 [2021-11-03 03:45:42,555 INFO L786 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 [2021-11-03 03:45:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35282 states. [2021-11-03 03:45:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35282 to 35280. [2021-11-03 03:45:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35280 states, 35279 states have (on average 1.5834349046174778) internal successors, (55862), 35279 states have internal predecessors, (55862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 55862 transitions. [2021-11-03 03:45:44,301 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 55862 transitions. Word has length 224 [2021-11-03 03:45:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:44,302 INFO L470 AbstractCegarLoop]: Abstraction has 35280 states and 55862 transitions. [2021-11-03 03:45:44,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 55862 transitions. [2021-11-03 03:45:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-03 03:45:44,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:44,307 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:44,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 03:45:44,307 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:44,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1170786719, now seen corresponding path program 1 times [2021-11-03 03:45:44,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:44,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250698574] [2021-11-03 03:45:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:44,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:44,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:44,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250698574] [2021-11-03 03:45:44,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250698574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:44,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:44,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:45:44,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027132934] [2021-11-03 03:45:44,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:45:44,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:45:44,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:45:44,432 INFO L87 Difference]: Start difference. First operand 35280 states and 55862 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:45,796 INFO L93 Difference]: Finished difference Result 69986 states and 110801 transitions. [2021-11-03 03:45:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:45:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-11-03 03:45:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:45,867 INFO L225 Difference]: With dead ends: 69986 [2021-11-03 03:45:45,868 INFO L226 Difference]: Without dead ends: 35282 [2021-11-03 03:45:45,904 INFO L786 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 [2021-11-03 03:45:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35282 states. [2021-11-03 03:45:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35282 to 35280. [2021-11-03 03:45:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35280 states, 35279 states have (on average 1.5807137390515604) internal successors, (55766), 35279 states have internal predecessors, (55766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 55766 transitions. [2021-11-03 03:45:47,774 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 55766 transitions. Word has length 225 [2021-11-03 03:45:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:47,774 INFO L470 AbstractCegarLoop]: Abstraction has 35280 states and 55766 transitions. [2021-11-03 03:45:47,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 55766 transitions. [2021-11-03 03:45:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-03 03:45:47,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:47,779 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:47,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 03:45:47,780 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:47,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1997153624, now seen corresponding path program 1 times [2021-11-03 03:45:47,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:47,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137070469] [2021-11-03 03:45:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:47,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:47,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:47,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137070469] [2021-11-03 03:45:47,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137070469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:47,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:47,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:45:47,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902644266] [2021-11-03 03:45:47,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:45:47,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:45:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:45:47,910 INFO L87 Difference]: Start difference. First operand 35280 states and 55766 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:49,423 INFO L93 Difference]: Finished difference Result 69986 states and 110609 transitions. [2021-11-03 03:45:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:45:49,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2021-11-03 03:45:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:49,498 INFO L225 Difference]: With dead ends: 69986 [2021-11-03 03:45:49,499 INFO L226 Difference]: Without dead ends: 35282 [2021-11-03 03:45:49,525 INFO L786 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 [2021-11-03 03:45:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35282 states. [2021-11-03 03:45:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35282 to 35280. [2021-11-03 03:45:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35280 states, 35279 states have (on average 1.577992573485643) internal successors, (55670), 35279 states have internal predecessors, (55670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 55670 transitions. [2021-11-03 03:45:51,204 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 55670 transitions. Word has length 226 [2021-11-03 03:45:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:51,204 INFO L470 AbstractCegarLoop]: Abstraction has 35280 states and 55670 transitions. [2021-11-03 03:45:51,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 55670 transitions. [2021-11-03 03:45:51,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-03 03:45:51,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:51,209 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:51,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 03:45:51,210 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1840165880, now seen corresponding path program 1 times [2021-11-03 03:45:51,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:51,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166545963] [2021-11-03 03:45:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:51,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:51,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:51,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166545963] [2021-11-03 03:45:51,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166545963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:51,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:51,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:45:51,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935630780] [2021-11-03 03:45:51,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:45:51,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:45:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:45:51,320 INFO L87 Difference]: Start difference. First operand 35280 states and 55670 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:52,836 INFO L93 Difference]: Finished difference Result 69986 states and 110417 transitions. [2021-11-03 03:45:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:45:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 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 227 [2021-11-03 03:45:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:52,889 INFO L225 Difference]: With dead ends: 69986 [2021-11-03 03:45:52,889 INFO L226 Difference]: Without dead ends: 35282 [2021-11-03 03:45:52,915 INFO L786 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 [2021-11-03 03:45:52,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35282 states. [2021-11-03 03:45:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35282 to 35280. [2021-11-03 03:45:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35280 states, 35279 states have (on average 1.5752714079197256) internal successors, (55574), 35279 states have internal predecessors, (55574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 55574 transitions. [2021-11-03 03:45:54,648 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 55574 transitions. Word has length 227 [2021-11-03 03:45:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:54,649 INFO L470 AbstractCegarLoop]: Abstraction has 35280 states and 55574 transitions. [2021-11-03 03:45:54,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 55574 transitions. [2021-11-03 03:45:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-03 03:45:54,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:54,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:54,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 03:45:54,654 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:54,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1263955089, now seen corresponding path program 1 times [2021-11-03 03:45:54,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:54,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690803627] [2021-11-03 03:45:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:54,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:54,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:54,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690803627] [2021-11-03 03:45:54,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690803627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:54,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:54,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:45:54,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554127633] [2021-11-03 03:45:54,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:45:54,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:45:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:45:54,779 INFO L87 Difference]: Start difference. First operand 35280 states and 55574 transitions. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:56,353 INFO L93 Difference]: Finished difference Result 69986 states and 110225 transitions. [2021-11-03 03:45:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:45:56,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2021-11-03 03:45:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:56,408 INFO L225 Difference]: With dead ends: 69986 [2021-11-03 03:45:56,408 INFO L226 Difference]: Without dead ends: 35282 [2021-11-03 03:45:56,431 INFO L786 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 [2021-11-03 03:45:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35282 states. [2021-11-03 03:45:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35282 to 35280. [2021-11-03 03:45:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35280 states, 35279 states have (on average 1.5725502423538082) internal successors, (55478), 35279 states have internal predecessors, (55478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 55478 transitions. [2021-11-03 03:45:58,182 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 55478 transitions. Word has length 228 [2021-11-03 03:45:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:58,182 INFO L470 AbstractCegarLoop]: Abstraction has 35280 states and 55478 transitions. [2021-11-03 03:45:58,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 55478 transitions. [2021-11-03 03:45:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-03 03:45:58,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:58,186 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:45:58,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 03:45:58,187 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash -702391520, now seen corresponding path program 1 times [2021-11-03 03:45:58,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:58,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781352198] [2021-11-03 03:45:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:58,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:58,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:58,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781352198] [2021-11-03 03:45:58,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781352198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:58,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:58,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:45:58,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639570431] [2021-11-03 03:45:58,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:45:58,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:45:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:45:58,430 INFO L87 Difference]: Start difference. First operand 35280 states and 55478 transitions. Second operand has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:00,601 INFO L93 Difference]: Finished difference Result 69986 states and 110033 transitions. [2021-11-03 03:46:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:46:00,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 0 states have call successors, (0), 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 230 [2021-11-03 03:46:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:00,656 INFO L225 Difference]: With dead ends: 69986 [2021-11-03 03:46:00,656 INFO L226 Difference]: Without dead ends: 35282 [2021-11-03 03:46:00,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:46:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35282 states. [2021-11-03 03:46:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35282 to 35280. [2021-11-03 03:46:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35280 states, 35279 states have (on average 1.571643187165169) internal successors, (55446), 35279 states have internal predecessors, (55446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 55446 transitions. [2021-11-03 03:46:02,550 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 55446 transitions. Word has length 230 [2021-11-03 03:46:02,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:02,550 INFO L470 AbstractCegarLoop]: Abstraction has 35280 states and 55446 transitions. [2021-11-03 03:46:02,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 55446 transitions. [2021-11-03 03:46:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-03 03:46:02,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:02,553 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:02,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 03:46:02,554 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:02,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1913172838, now seen corresponding path program 1 times [2021-11-03 03:46:02,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:02,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643694812] [2021-11-03 03:46:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:02,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:02,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:02,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643694812] [2021-11-03 03:46:02,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643694812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:02,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:02,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:46:02,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666810649] [2021-11-03 03:46:02,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:46:02,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:46:02,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:46:02,833 INFO L87 Difference]: Start difference. First operand 35280 states and 55446 transitions. Second operand has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:05,929 INFO L93 Difference]: Finished difference Result 86919 states and 136146 transitions. [2021-11-03 03:46:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:46:05,930 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-11-03 03:46:05,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:06,020 INFO L225 Difference]: With dead ends: 86919 [2021-11-03 03:46:06,021 INFO L226 Difference]: Without dead ends: 52215 [2021-11-03 03:46:06,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:46:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52215 states.