./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-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_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/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_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/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_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/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 9260884558ccc913fea23720ea19c1107cd16edf25af23049028c38b098feff1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:32:06,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:32:06,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:32:06,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:32:06,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:32:06,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:32:06,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:32:06,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:32:06,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:32:06,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:32:06,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:32:06,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:32:06,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:32:06,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:32:06,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:32:06,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:32:06,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:32:06,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:32:06,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:32:06,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:32:06,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:32:06,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:32:06,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:32:06,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:32:06,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:32:06,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:32:06,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:32:06,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:32:06,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:32:06,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:32:06,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:32:06,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:32:06,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:32:06,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:32:06,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:32:06,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:32:06,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:32:06,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:32:06,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:32:06,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:32:06,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:32:06,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:32:06,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:32:06,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:32:06,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:32:06,174 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:32:06,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:32:06,174 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:32:06,175 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:32:06,175 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:32:06,175 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:32:06,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:32:06,176 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:32:06,176 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:32:06,176 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:32:06,176 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:32:06,177 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:32:06,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:32:06,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:32:06,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:32:06,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:32:06,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:32:06,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:32:06,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:32:06,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:32:06,179 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:32:06,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:32:06,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:32:06,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:32:06,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:32:06,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:32:06,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:32:06,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:06,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:32:06,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:32:06,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:32:06,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:32:06,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:32:06,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:32:06,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:32:06,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:32:06,183 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_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9260884558ccc913fea23720ea19c1107cd16edf25af23049028c38b098feff1 [2021-11-03 04:32:06,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:32:06,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:32:06,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:32:06,495 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:32:06,496 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:32:06,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 04:32:06,563 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/data/e5c5a8573/7f48b01715614f2d9a5ad58e22328b9b/FLAGec3892489 [2021-11-03 04:32:07,064 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:32:07,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 04:32:07,089 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/data/e5c5a8573/7f48b01715614f2d9a5ad58e22328b9b/FLAGec3892489 [2021-11-03 04:32:07,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/data/e5c5a8573/7f48b01715614f2d9a5ad58e22328b9b [2021-11-03 04:32:07,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:32:07,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:32:07,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:07,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:32:07,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:32:07,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:07" (1/1) ... [2021-11-03 04:32:07,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f77e9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:07, skipping insertion in model container [2021-11-03 04:32:07,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:07" (1/1) ... [2021-11-03 04:32:07,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:32:07,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:32:07,906 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_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15864,15877] [2021-11-03 04:32:08,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:08,020 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:32:08,167 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_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15864,15877] [2021-11-03 04:32:08,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:08,257 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:32:08,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08 WrapperNode [2021-11-03 04:32:08,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:08,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:32:08,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:32:08,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:32:08,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:32:08,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:32:08,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:32:08,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:32:08,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:32:08,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:32:08,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:32:08,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:32:08,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (1/1) ... [2021-11-03 04:32:08,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:08,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:08,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:32:08,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486cb3a1-3ef2-4942-a4e0-e23b98f2708b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:32:08,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:32:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:32:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:32:08,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:32:11,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:32:11,094 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 04:32:11,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:32:11 BoogieIcfgContainer [2021-11-03 04:32:11,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:32:11,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:32:11,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:32:11,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:32:11,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:32:07" (1/3) ... [2021-11-03 04:32:11,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8271d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:32:11, skipping insertion in model container [2021-11-03 04:32:11,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:08" (2/3) ... [2021-11-03 04:32:11,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8271d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:32:11, skipping insertion in model container [2021-11-03 04:32:11,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:32:11" (3/3) ... [2021-11-03 04:32:11,109 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 04:32:11,119 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:32:11,119 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:32:11,184 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:32:11,190 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 04:32:11,190 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:32:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 250 states, 248 states have (on average 1.778225806451613) internal successors, (441), 249 states have internal predecessors, (441), 0 states have call successors, (0), 0 states 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 04:32:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-03 04:32:11,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:11,228 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] [2021-11-03 04:32:11,229 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash 265685471, now seen corresponding path program 1 times [2021-11-03 04:32:11,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:11,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625296544] [2021-11-03 04:32:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:11,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:12,216 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 04:32:12,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:12,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625296544] [2021-11-03 04:32:12,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625296544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:12,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:12,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:12,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987864347] [2021-11-03 04:32:12,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:12,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:12,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:12,254 INFO L87 Difference]: Start difference. First operand has 250 states, 248 states have (on average 1.778225806451613) internal successors, (441), 249 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:12,545 INFO L93 Difference]: Finished difference Result 621 states and 1086 transitions. [2021-11-03 04:32:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:12,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-03 04:32:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:12,580 INFO L225 Difference]: With dead ends: 621 [2021-11-03 04:32:12,580 INFO L226 Difference]: Without dead ends: 441 [2021-11-03 04:32:12,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-03 04:32:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 439. [2021-11-03 04:32:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.3881278538812785) internal successors, (608), 438 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 04:32:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 608 transitions. [2021-11-03 04:32:12,720 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 608 transitions. Word has length 118 [2021-11-03 04:32:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:12,721 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 608 transitions. [2021-11-03 04:32:12,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 608 transitions. [2021-11-03 04:32:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-03 04:32:12,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:12,738 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] [2021-11-03 04:32:12,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:32:12,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash 967884644, now seen corresponding path program 1 times [2021-11-03 04:32:12,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:12,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749381854] [2021-11-03 04:32:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:12,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:12,943 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 04:32:12,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:12,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749381854] [2021-11-03 04:32:12,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749381854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:12,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:12,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:12,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922446584] [2021-11-03 04:32:12,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:12,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:12,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:12,953 INFO L87 Difference]: Start difference. First operand 439 states and 608 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:13,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:13,048 INFO L93 Difference]: Finished difference Result 930 states and 1305 transitions. [2021-11-03 04:32:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:13,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-03 04:32:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:13,056 INFO L225 Difference]: With dead ends: 930 [2021-11-03 04:32:13,056 INFO L226 Difference]: Without dead ends: 591 [2021-11-03 04:32:13,062 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 04:32:13,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-03 04:32:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 549. [2021-11-03 04:32:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.4324817518248176) internal successors, (785), 548 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 04:32:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 785 transitions. [2021-11-03 04:32:13,157 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 785 transitions. Word has length 120 [2021-11-03 04:32:13,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:13,160 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 785 transitions. [2021-11-03 04:32:13,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 785 transitions. [2021-11-03 04:32:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-03 04:32:13,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:13,171 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] [2021-11-03 04:32:13,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:32:13,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1487273273, now seen corresponding path program 1 times [2021-11-03 04:32:13,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:13,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602516613] [2021-11-03 04:32:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:13,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:13,323 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 04:32:13,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:13,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602516613] [2021-11-03 04:32:13,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602516613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:13,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:13,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:13,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97873734] [2021-11-03 04:32:13,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:13,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:13,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:13,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:13,331 INFO L87 Difference]: Start difference. First operand 549 states and 785 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:13,424 INFO L93 Difference]: Finished difference Result 1338 states and 1965 transitions. [2021-11-03 04:32:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:13,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-03 04:32:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:13,430 INFO L225 Difference]: With dead ends: 1338 [2021-11-03 04:32:13,430 INFO L226 Difference]: Without dead ends: 835 [2021-11-03 04:32:13,431 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 04:32:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-11-03 04:32:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 747. [2021-11-03 04:32:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 1.4812332439678284) internal successors, (1105), 746 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 04:32:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1105 transitions. [2021-11-03 04:32:13,479 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1105 transitions. Word has length 120 [2021-11-03 04:32:13,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:13,480 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1105 transitions. [2021-11-03 04:32:13,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1105 transitions. [2021-11-03 04:32:13,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-03 04:32:13,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:13,482 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:13,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:32:13,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:13,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:13,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1865971501, now seen corresponding path program 1 times [2021-11-03 04:32:13,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:13,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247130640] [2021-11-03 04:32:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:13,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:13,872 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 04:32:13,873 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:13,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247130640] [2021-11-03 04:32:13,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247130640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:13,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:13,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:13,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961587042] [2021-11-03 04:32:13,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:13,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:13,878 INFO L87 Difference]: Start difference. First operand 747 states and 1105 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:14,131 INFO L93 Difference]: Finished difference Result 2003 states and 3009 transitions. [2021-11-03 04:32:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:14,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-03 04:32:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:14,143 INFO L225 Difference]: With dead ends: 2003 [2021-11-03 04:32:14,143 INFO L226 Difference]: Without dead ends: 1381 [2021-11-03 04:32:14,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-11-03 04:32:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1379. [2021-11-03 04:32:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 1.4840348330914368) internal successors, (2045), 1378 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states 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 04:32:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 2045 transitions. [2021-11-03 04:32:14,266 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 2045 transitions. Word has length 123 [2021-11-03 04:32:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:14,267 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 2045 transitions. [2021-11-03 04:32:14,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 2045 transitions. [2021-11-03 04:32:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-03 04:32:14,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:14,270 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:14,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:32:14,271 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:14,272 INFO L85 PathProgramCache]: Analyzing trace with hash 485100428, now seen corresponding path program 1 times [2021-11-03 04:32:14,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:14,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936405867] [2021-11-03 04:32:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:14,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:14,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:14,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936405867] [2021-11-03 04:32:14,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936405867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:14,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:14,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:14,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337269249] [2021-11-03 04:32:14,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:14,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:14,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:14,418 INFO L87 Difference]: Start difference. First operand 1379 states and 2045 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:14,743 INFO L93 Difference]: Finished difference Result 2716 states and 4043 transitions. [2021-11-03 04:32:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:14,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-03 04:32:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:14,754 INFO L225 Difference]: With dead ends: 2716 [2021-11-03 04:32:14,754 INFO L226 Difference]: Without dead ends: 1379 [2021-11-03 04:32:14,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-11-03 04:32:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1379. [2021-11-03 04:32:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 1.4687953555878084) internal successors, (2024), 1378 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states 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 04:32:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 2024 transitions. [2021-11-03 04:32:14,898 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 2024 transitions. Word has length 123 [2021-11-03 04:32:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:14,899 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 2024 transitions. [2021-11-03 04:32:14,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 2024 transitions. [2021-11-03 04:32:14,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-03 04:32:14,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:14,902 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:14,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:32:14,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:14,904 INFO L85 PathProgramCache]: Analyzing trace with hash 728096551, now seen corresponding path program 1 times [2021-11-03 04:32:14,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:14,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628777226] [2021-11-03 04:32:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:14,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:15,247 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 04:32:15,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:15,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628777226] [2021-11-03 04:32:15,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628777226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:15,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:15,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:15,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17393871] [2021-11-03 04:32:15,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:15,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:15,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:15,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:15,263 INFO L87 Difference]: Start difference. First operand 1379 states and 2024 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:15,613 INFO L93 Difference]: Finished difference Result 3659 states and 5375 transitions. [2021-11-03 04:32:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:15,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-03 04:32:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:15,629 INFO L225 Difference]: With dead ends: 3659 [2021-11-03 04:32:15,629 INFO L226 Difference]: Without dead ends: 2404 [2021-11-03 04:32:15,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:15,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-11-03 04:32:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2402. [2021-11-03 04:32:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 1.4531445231153686) internal successors, (3489), 2401 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states 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 04:32:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 3489 transitions. [2021-11-03 04:32:15,915 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 3489 transitions. Word has length 123 [2021-11-03 04:32:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:15,916 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 3489 transitions. [2021-11-03 04:32:15,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 3489 transitions. [2021-11-03 04:32:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-03 04:32:15,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:15,921 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] [2021-11-03 04:32:15,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:32:15,921 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -481552101, now seen corresponding path program 1 times [2021-11-03 04:32:15,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:15,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433362540] [2021-11-03 04:32:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:15,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:15,995 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 04:32:15,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:15,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433362540] [2021-11-03 04:32:15,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433362540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:15,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:15,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:15,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862754370] [2021-11-03 04:32:15,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:15,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:15,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:16,000 INFO L87 Difference]: Start difference. First operand 2402 states and 3489 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 04:32:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:16,505 INFO L93 Difference]: Finished difference Result 6121 states and 9059 transitions. [2021-11-03 04:32:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:16,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-11-03 04:32:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:16,532 INFO L225 Difference]: With dead ends: 6121 [2021-11-03 04:32:16,533 INFO L226 Difference]: Without dead ends: 3816 [2021-11-03 04:32:16,540 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 04:32:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-11-03 04:32:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3592. [2021-11-03 04:32:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 1.494291283764968) internal successors, (5366), 3591 states have internal predecessors, (5366), 0 states have call successors, (0), 0 states 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 04:32:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 5366 transitions. [2021-11-03 04:32:16,972 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 5366 transitions. Word has length 125 [2021-11-03 04:32:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:16,973 INFO L470 AbstractCegarLoop]: Abstraction has 3592 states and 5366 transitions. [2021-11-03 04:32:16,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 04:32:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 5366 transitions. [2021-11-03 04:32:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:32:16,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:16,977 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] [2021-11-03 04:32:16,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:32:16,978 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:16,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:16,978 INFO L85 PathProgramCache]: Analyzing trace with hash -562064942, now seen corresponding path program 1 times [2021-11-03 04:32:16,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:16,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597868774] [2021-11-03 04:32:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:16,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:17,133 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 04:32:17,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:17,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597868774] [2021-11-03 04:32:17,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597868774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:17,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:17,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:17,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167319177] [2021-11-03 04:32:17,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:17,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:17,137 INFO L87 Difference]: Start difference. First operand 3592 states and 5366 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 04:32:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:17,664 INFO L93 Difference]: Finished difference Result 6489 states and 9734 transitions. [2021-11-03 04:32:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:17,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-03 04:32:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:17,684 INFO L225 Difference]: With dead ends: 6489 [2021-11-03 04:32:17,685 INFO L226 Difference]: Without dead ends: 3592 [2021-11-03 04:32:17,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-11-03 04:32:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3592. [2021-11-03 04:32:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 1.481203007518797) internal successors, (5319), 3591 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states 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 04:32:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 5319 transitions. [2021-11-03 04:32:18,149 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 5319 transitions. Word has length 128 [2021-11-03 04:32:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:18,150 INFO L470 AbstractCegarLoop]: Abstraction has 3592 states and 5319 transitions. [2021-11-03 04:32:18,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 04:32:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 5319 transitions. [2021-11-03 04:32:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:32:18,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:18,155 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] [2021-11-03 04:32:18,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:32:18,155 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash -902667497, now seen corresponding path program 1 times [2021-11-03 04:32:18,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:18,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969572966] [2021-11-03 04:32:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:18,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:18,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:18,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969572966] [2021-11-03 04:32:18,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969572966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:18,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:18,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:18,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465390270] [2021-11-03 04:32:18,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:18,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:18,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:18,449 INFO L87 Difference]: Start difference. First operand 3592 states and 5319 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 04:32:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:19,064 INFO L93 Difference]: Finished difference Result 8556 states and 12752 transitions. [2021-11-03 04:32:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-03 04:32:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:19,101 INFO L225 Difference]: With dead ends: 8556 [2021-11-03 04:32:19,101 INFO L226 Difference]: Without dead ends: 5285 [2021-11-03 04:32:19,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5285 states. [2021-11-03 04:32:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5285 to 5283. [2021-11-03 04:32:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5283 states, 5282 states have (on average 1.4636501325255584) internal successors, (7731), 5282 states have internal predecessors, (7731), 0 states have call successors, (0), 0 states 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 04:32:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5283 states to 5283 states and 7731 transitions. [2021-11-03 04:32:19,791 INFO L78 Accepts]: Start accepts. Automaton has 5283 states and 7731 transitions. Word has length 128 [2021-11-03 04:32:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:19,792 INFO L470 AbstractCegarLoop]: Abstraction has 5283 states and 7731 transitions. [2021-11-03 04:32:19,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 04:32:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5283 states and 7731 transitions. [2021-11-03 04:32:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 04:32:19,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:19,797 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] [2021-11-03 04:32:19,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 04:32:19,797 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash 300249033, now seen corresponding path program 1 times [2021-11-03 04:32:19,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:19,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110255329] [2021-11-03 04:32:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:19,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:20,144 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 04:32:20,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:20,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110255329] [2021-11-03 04:32:20,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110255329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:20,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:20,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:20,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118814707] [2021-11-03 04:32:20,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:20,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:20,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:20,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:20,148 INFO L87 Difference]: Start difference. First operand 5283 states and 7731 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:20,893 INFO L93 Difference]: Finished difference Result 7140 states and 10492 transitions. [2021-11-03 04:32:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:20,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-03 04:32:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:20,923 INFO L225 Difference]: With dead ends: 7140 [2021-11-03 04:32:20,923 INFO L226 Difference]: Without dead ends: 5295 [2021-11-03 04:32:20,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2021-11-03 04:32:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 5275. [2021-11-03 04:32:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5275 states, 5274 states have (on average 1.4639742131209708) internal successors, (7721), 5274 states have internal predecessors, (7721), 0 states have call successors, (0), 0 states 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 04:32:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5275 states to 5275 states and 7721 transitions. [2021-11-03 04:32:21,593 INFO L78 Accepts]: Start accepts. Automaton has 5275 states and 7721 transitions. Word has length 133 [2021-11-03 04:32:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:21,593 INFO L470 AbstractCegarLoop]: Abstraction has 5275 states and 7721 transitions. [2021-11-03 04:32:21,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5275 states and 7721 transitions. [2021-11-03 04:32:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 04:32:21,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:21,600 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] [2021-11-03 04:32:21,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 04:32:21,600 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2095861219, now seen corresponding path program 1 times [2021-11-03 04:32:21,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:21,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97681829] [2021-11-03 04:32:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:21,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:24,369 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 04:32:24,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:24,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97681829] [2021-11-03 04:32:24,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97681829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:24,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:24,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-03 04:32:24,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139728907] [2021-11-03 04:32:24,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-03 04:32:24,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:24,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-03 04:32:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-11-03 04:32:24,374 INFO L87 Difference]: Start difference. First operand 5275 states and 7721 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:30,809 INFO L93 Difference]: Finished difference Result 7641 states and 11036 transitions. [2021-11-03 04:32:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-03 04:32:30,810 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-03 04:32:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:30,855 INFO L225 Difference]: With dead ends: 7641 [2021-11-03 04:32:30,856 INFO L226 Difference]: Without dead ends: 5995 [2021-11-03 04:32:30,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=420, Invalid=1560, Unknown=0, NotChecked=0, Total=1980 [2021-11-03 04:32:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-11-03 04:32:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 5369. [2021-11-03 04:32:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5369 states, 5368 states have (on average 1.459575260804769) internal successors, (7835), 5368 states have internal predecessors, (7835), 0 states have call successors, (0), 0 states 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 04:32:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5369 states to 5369 states and 7835 transitions. [2021-11-03 04:32:31,630 INFO L78 Accepts]: Start accepts. Automaton has 5369 states and 7835 transitions. Word has length 133 [2021-11-03 04:32:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:31,630 INFO L470 AbstractCegarLoop]: Abstraction has 5369 states and 7835 transitions. [2021-11-03 04:32:31,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5369 states and 7835 transitions. [2021-11-03 04:32:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 04:32:31,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:31,638 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] [2021-11-03 04:32:31,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 04:32:31,639 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:31,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash -63864136, now seen corresponding path program 1 times [2021-11-03 04:32:31,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:31,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118391892] [2021-11-03 04:32:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:31,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:31,745 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 04:32:31,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:31,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118391892] [2021-11-03 04:32:31,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118391892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:31,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:31,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:31,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238512227] [2021-11-03 04:32:31,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:31,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:31,749 INFO L87 Difference]: Start difference. First operand 5369 states and 7835 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:32,453 INFO L93 Difference]: Finished difference Result 10568 states and 15461 transitions. [2021-11-03 04:32:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:32,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-03 04:32:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:32,466 INFO L225 Difference]: With dead ends: 10568 [2021-11-03 04:32:32,466 INFO L226 Difference]: Without dead ends: 5369 [2021-11-03 04:32:32,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5369 states. [2021-11-03 04:32:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5369 to 5369. [2021-11-03 04:32:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5369 states, 5368 states have (on average 1.4407600596125187) internal successors, (7734), 5368 states have internal predecessors, (7734), 0 states have call successors, (0), 0 states 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 04:32:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5369 states to 5369 states and 7734 transitions. [2021-11-03 04:32:33,040 INFO L78 Accepts]: Start accepts. Automaton has 5369 states and 7734 transitions. Word has length 133 [2021-11-03 04:32:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:33,041 INFO L470 AbstractCegarLoop]: Abstraction has 5369 states and 7734 transitions. [2021-11-03 04:32:33,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 5369 states and 7734 transitions. [2021-11-03 04:32:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 04:32:33,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:33,046 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] [2021-11-03 04:32:33,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 04:32:33,046 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1678359298, now seen corresponding path program 1 times [2021-11-03 04:32:33,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:33,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186233631] [2021-11-03 04:32:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:33,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:33,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:33,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186233631] [2021-11-03 04:32:33,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186233631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:33,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:33,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:33,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444303257] [2021-11-03 04:32:33,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:33,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:33,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:33,121 INFO L87 Difference]: Start difference. First operand 5369 states and 7734 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:33,979 INFO L93 Difference]: Finished difference Result 9000 states and 13063 transitions. [2021-11-03 04:32:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:33,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-03 04:32:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:33,999 INFO L225 Difference]: With dead ends: 9000 [2021-11-03 04:32:34,000 INFO L226 Difference]: Without dead ends: 7232 [2021-11-03 04:32:34,005 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 04:32:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2021-11-03 04:32:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 7230. [2021-11-03 04:32:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 1.4304883109697053) internal successors, (10341), 7229 states have internal predecessors, (10341), 0 states have call successors, (0), 0 states 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 04:32:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 10341 transitions. [2021-11-03 04:32:34,844 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 10341 transitions. Word has length 133 [2021-11-03 04:32:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:34,845 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 10341 transitions. [2021-11-03 04:32:34,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 10341 transitions. [2021-11-03 04:32:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 04:32:34,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:34,852 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] [2021-11-03 04:32:34,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 04:32:34,853 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:34,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1916874385, now seen corresponding path program 1 times [2021-11-03 04:32:34,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:34,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406652889] [2021-11-03 04:32:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:34,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:35,064 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 04:32:35,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:35,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406652889] [2021-11-03 04:32:35,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406652889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:35,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:35,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:35,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075489561] [2021-11-03 04:32:35,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:35,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:35,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:35,067 INFO L87 Difference]: Start difference. First operand 7230 states and 10341 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:35,829 INFO L93 Difference]: Finished difference Result 10908 states and 15809 transitions. [2021-11-03 04:32:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:35,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-03 04:32:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:35,845 INFO L225 Difference]: With dead ends: 10908 [2021-11-03 04:32:35,845 INFO L226 Difference]: Without dead ends: 6434 [2021-11-03 04:32:35,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6434 states. [2021-11-03 04:32:36,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6434 to 6432. [2021-11-03 04:32:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6432 states, 6431 states have (on average 1.4316591509874048) internal successors, (9207), 6431 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states 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 04:32:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6432 states to 6432 states and 9207 transitions. [2021-11-03 04:32:36,418 INFO L78 Accepts]: Start accepts. Automaton has 6432 states and 9207 transitions. Word has length 133 [2021-11-03 04:32:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:36,418 INFO L470 AbstractCegarLoop]: Abstraction has 6432 states and 9207 transitions. [2021-11-03 04:32:36,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6432 states and 9207 transitions. [2021-11-03 04:32:36,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 04:32:36,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:36,424 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] [2021-11-03 04:32:36,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 04:32:36,424 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:36,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2034373985, now seen corresponding path program 1 times [2021-11-03 04:32:36,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:36,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630866183] [2021-11-03 04:32:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:36,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:39,861 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 04:32:39,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:39,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630866183] [2021-11-03 04:32:39,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630866183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:39,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:39,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-03 04:32:39,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382501164] [2021-11-03 04:32:39,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-03 04:32:39,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-03 04:32:39,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-11-03 04:32:39,865 INFO L87 Difference]: Start difference. First operand 6432 states and 9207 transitions. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:47,985 INFO L93 Difference]: Finished difference Result 8797 states and 12458 transitions. [2021-11-03 04:32:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-03 04:32:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-03 04:32:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:48,003 INFO L225 Difference]: With dead ends: 8797 [2021-11-03 04:32:48,003 INFO L226 Difference]: Without dead ends: 7151 [2021-11-03 04:32:48,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2021-11-03 04:32:48,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-11-03 04:32:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 6530. [2021-11-03 04:32:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 6529 states have (on average 1.4280900597334967) internal successors, (9324), 6529 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states 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 04:32:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 9324 transitions. [2021-11-03 04:32:48,906 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 9324 transitions. Word has length 133 [2021-11-03 04:32:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:48,906 INFO L470 AbstractCegarLoop]: Abstraction has 6530 states and 9324 transitions. [2021-11-03 04:32:48,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:32:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 9324 transitions. [2021-11-03 04:32:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 04:32:48,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:48,913 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] [2021-11-03 04:32:48,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 04:32:48,914 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash -300051329, now seen corresponding path program 1 times [2021-11-03 04:32:48,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:48,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747535257] [2021-11-03 04:32:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:48,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:48,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:48,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747535257] [2021-11-03 04:32:48,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747535257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:48,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:48,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:48,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838444720] [2021-11-03 04:32:48,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:48,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:48,973 INFO L87 Difference]: Start difference. First operand 6530 states and 9324 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:49,723 INFO L93 Difference]: Finished difference Result 11263 states and 16137 transitions. [2021-11-03 04:32:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:49,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-03 04:32:49,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:49,736 INFO L225 Difference]: With dead ends: 11263 [2021-11-03 04:32:49,737 INFO L226 Difference]: Without dead ends: 6560 [2021-11-03 04:32:49,745 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 04:32:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6560 states. [2021-11-03 04:32:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6560 to 6470. [2021-11-03 04:32:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6470 states, 6469 states have (on average 1.4226310094295873) internal successors, (9203), 6469 states have internal predecessors, (9203), 0 states have call successors, (0), 0 states 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 04:32:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6470 states to 6470 states and 9203 transitions. [2021-11-03 04:32:50,593 INFO L78 Accepts]: Start accepts. Automaton has 6470 states and 9203 transitions. Word has length 134 [2021-11-03 04:32:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:50,594 INFO L470 AbstractCegarLoop]: Abstraction has 6470 states and 9203 transitions. [2021-11-03 04:32:50,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:50,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6470 states and 9203 transitions. [2021-11-03 04:32:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 04:32:50,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:50,599 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] [2021-11-03 04:32:50,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 04:32:50,600 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1949700421, now seen corresponding path program 1 times [2021-11-03 04:32:50,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:50,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147891256] [2021-11-03 04:32:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:50,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:50,641 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 04:32:50,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:50,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147891256] [2021-11-03 04:32:50,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147891256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:50,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:50,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:50,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028554935] [2021-11-03 04:32:50,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:50,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:50,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:50,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:50,644 INFO L87 Difference]: Start difference. First operand 6470 states and 9203 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:51,372 INFO L93 Difference]: Finished difference Result 13564 states and 19242 transitions. [2021-11-03 04:32:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:51,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-03 04:32:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:51,381 INFO L225 Difference]: With dead ends: 13564 [2021-11-03 04:32:51,381 INFO L226 Difference]: Without dead ends: 7420 [2021-11-03 04:32:51,391 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 04:32:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7420 states. [2021-11-03 04:32:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7420 to 6402. [2021-11-03 04:32:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 1.4163411966880175) internal successors, (9066), 6401 states have internal predecessors, (9066), 0 states have call successors, (0), 0 states 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 04:32:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 9066 transitions. [2021-11-03 04:32:52,163 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 9066 transitions. Word has length 134 [2021-11-03 04:32:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:52,164 INFO L470 AbstractCegarLoop]: Abstraction has 6402 states and 9066 transitions. [2021-11-03 04:32:52,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 9066 transitions. [2021-11-03 04:32:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 04:32:52,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:52,170 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] [2021-11-03 04:32:52,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 04:32:52,170 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash -376213469, now seen corresponding path program 1 times [2021-11-03 04:32:52,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:52,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970610276] [2021-11-03 04:32:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:52,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:52,217 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 04:32:52,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:52,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970610276] [2021-11-03 04:32:52,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970610276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:52,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:52,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:52,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238319551] [2021-11-03 04:32:52,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:52,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:52,222 INFO L87 Difference]: Start difference. First operand 6402 states and 9066 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:53,070 INFO L93 Difference]: Finished difference Result 12244 states and 17327 transitions. [2021-11-03 04:32:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:53,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-03 04:32:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:53,079 INFO L225 Difference]: With dead ends: 12244 [2021-11-03 04:32:53,079 INFO L226 Difference]: Without dead ends: 7469 [2021-11-03 04:32:53,083 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 04:32:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7469 states. [2021-11-03 04:32:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7469 to 6292. [2021-11-03 04:32:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6292 states, 6291 states have (on average 1.4142425687490066) internal successors, (8897), 6291 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states 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 04:32:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6292 states to 6292 states and 8897 transitions. [2021-11-03 04:32:53,605 INFO L78 Accepts]: Start accepts. Automaton has 6292 states and 8897 transitions. Word has length 134 [2021-11-03 04:32:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:53,605 INFO L470 AbstractCegarLoop]: Abstraction has 6292 states and 8897 transitions. [2021-11-03 04:32:53,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 6292 states and 8897 transitions. [2021-11-03 04:32:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 04:32:53,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:53,610 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] [2021-11-03 04:32:53,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 04:32:53,610 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:53,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1145639596, now seen corresponding path program 1 times [2021-11-03 04:32:53,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:53,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655028467] [2021-11-03 04:32:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:53,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:53,653 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 04:32:53,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:53,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655028467] [2021-11-03 04:32:53,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655028467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:53,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:53,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:53,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960095883] [2021-11-03 04:32:53,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:53,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:53,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:53,656 INFO L87 Difference]: Start difference. First operand 6292 states and 8897 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:54,252 INFO L93 Difference]: Finished difference Result 10146 states and 14328 transitions. [2021-11-03 04:32:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-03 04:32:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:54,258 INFO L225 Difference]: With dead ends: 10146 [2021-11-03 04:32:54,258 INFO L226 Difference]: Without dead ends: 6394 [2021-11-03 04:32:54,261 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 04:32:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6394 states. [2021-11-03 04:32:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6394 to 6247. [2021-11-03 04:32:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 6246 states have (on average 1.409862311879603) internal successors, (8806), 6246 states have internal predecessors, (8806), 0 states have call successors, (0), 0 states 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 04:32:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 8806 transitions. [2021-11-03 04:32:54,728 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 8806 transitions. Word has length 134 [2021-11-03 04:32:54,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:54,728 INFO L470 AbstractCegarLoop]: Abstraction has 6247 states and 8806 transitions. [2021-11-03 04:32:54,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:54,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 8806 transitions. [2021-11-03 04:32:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 04:32:54,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:54,734 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] [2021-11-03 04:32:54,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 04:32:54,734 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:54,735 INFO L85 PathProgramCache]: Analyzing trace with hash 821314062, now seen corresponding path program 1 times [2021-11-03 04:32:54,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:54,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497652798] [2021-11-03 04:32:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:54,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:54,785 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 04:32:54,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:54,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497652798] [2021-11-03 04:32:54,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497652798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:54,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:54,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:54,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296139630] [2021-11-03 04:32:54,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:54,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:54,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:54,788 INFO L87 Difference]: Start difference. First operand 6247 states and 8806 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:55,552 INFO L93 Difference]: Finished difference Result 10486 states and 14724 transitions. [2021-11-03 04:32:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:55,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-03 04:32:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:55,561 INFO L225 Difference]: With dead ends: 10486 [2021-11-03 04:32:55,561 INFO L226 Difference]: Without dead ends: 6687 [2021-11-03 04:32:55,566 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 04:32:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2021-11-03 04:32:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 6197. [2021-11-03 04:32:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6197 states, 6196 states have (on average 1.4049386701097482) internal successors, (8705), 6196 states have internal predecessors, (8705), 0 states have call successors, (0), 0 states 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 04:32:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6197 states to 6197 states and 8705 transitions. [2021-11-03 04:32:56,270 INFO L78 Accepts]: Start accepts. Automaton has 6197 states and 8705 transitions. Word has length 134 [2021-11-03 04:32:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:56,270 INFO L470 AbstractCegarLoop]: Abstraction has 6197 states and 8705 transitions. [2021-11-03 04:32:56,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6197 states and 8705 transitions. [2021-11-03 04:32:56,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 04:32:56,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:56,276 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] [2021-11-03 04:32:56,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 04:32:56,276 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:56,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2109565396, now seen corresponding path program 1 times [2021-11-03 04:32:56,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:56,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995737453] [2021-11-03 04:32:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:56,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:56,326 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 04:32:56,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:56,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995737453] [2021-11-03 04:32:56,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995737453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:56,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:56,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:56,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452416850] [2021-11-03 04:32:56,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:56,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:56,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:56,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:56,329 INFO L87 Difference]: Start difference. First operand 6197 states and 8705 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:57,076 INFO L93 Difference]: Finished difference Result 11436 states and 15985 transitions. [2021-11-03 04:32:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:57,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-03 04:32:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:57,084 INFO L225 Difference]: With dead ends: 11436 [2021-11-03 04:32:57,084 INFO L226 Difference]: Without dead ends: 7231 [2021-11-03 04:32:57,089 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 04:32:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7231 states. [2021-11-03 04:32:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7231 to 6136. [2021-11-03 04:32:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6136 states, 6135 states have (on average 1.4011409942950286) internal successors, (8596), 6135 states have internal predecessors, (8596), 0 states have call successors, (0), 0 states 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 04:32:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 8596 transitions. [2021-11-03 04:32:57,629 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 8596 transitions. Word has length 134 [2021-11-03 04:32:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:57,630 INFO L470 AbstractCegarLoop]: Abstraction has 6136 states and 8596 transitions. [2021-11-03 04:32:57,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:32:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 8596 transitions. [2021-11-03 04:32:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 04:32:57,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:57,634 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:57,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-03 04:32:57,634 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash 892474324, now seen corresponding path program 1 times [2021-11-03 04:32:57,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:57,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022225502] [2021-11-03 04:32:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:57,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:03,794 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 04:33:03,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:33:03,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022225502] [2021-11-03 04:33:03,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022225502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:03,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:03,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-11-03 04:33:03,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482577633] [2021-11-03 04:33:03,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-03 04:33:03,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:33:03,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-03 04:33:03,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 04:33:03,797 INFO L87 Difference]: Start difference. First operand 6136 states and 8596 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 40 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:16,305 INFO L93 Difference]: Finished difference Result 17380 states and 24889 transitions. [2021-11-03 04:33:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-03 04:33:16,306 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 40 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-03 04:33:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:16,326 INFO L225 Difference]: With dead ends: 17380 [2021-11-03 04:33:16,326 INFO L226 Difference]: Without dead ends: 12582 [2021-11-03 04:33:16,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=935, Invalid=4321, Unknown=0, NotChecked=0, Total=5256 [2021-11-03 04:33:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12582 states. [2021-11-03 04:33:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12582 to 9693. [2021-11-03 04:33:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9693 states, 9692 states have (on average 1.3795914156004954) internal successors, (13371), 9692 states have internal predecessors, (13371), 0 states have call successors, (0), 0 states 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 04:33:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9693 states to 9693 states and 13371 transitions. [2021-11-03 04:33:17,368 INFO L78 Accepts]: Start accepts. Automaton has 9693 states and 13371 transitions. Word has length 136 [2021-11-03 04:33:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:17,369 INFO L470 AbstractCegarLoop]: Abstraction has 9693 states and 13371 transitions. [2021-11-03 04:33:17,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 40 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 9693 states and 13371 transitions. [2021-11-03 04:33:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 04:33:17,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:17,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:17,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-03 04:33:17,373 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash -114363634, now seen corresponding path program 1 times [2021-11-03 04:33:17,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:33:17,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504846492] [2021-11-03 04:33:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:17,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:33:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:21,990 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 04:33:21,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:33:21,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504846492] [2021-11-03 04:33:21,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504846492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:21,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:21,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-11-03 04:33:21,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756992609] [2021-11-03 04:33:21,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-03 04:33:21,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:33:21,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-03 04:33:21,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 04:33:21,994 INFO L87 Difference]: Start difference. First operand 9693 states and 13371 transitions. Second operand has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:34,734 INFO L93 Difference]: Finished difference Result 20604 states and 29212 transitions. [2021-11-03 04:33:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-03 04:33:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-03 04:33:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:34,754 INFO L225 Difference]: With dead ends: 20604 [2021-11-03 04:33:34,755 INFO L226 Difference]: Without dead ends: 15482 [2021-11-03 04:33:34,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=628, Invalid=4628, Unknown=0, NotChecked=0, Total=5256 [2021-11-03 04:33:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15482 states. [2021-11-03 04:33:36,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15482 to 12536. [2021-11-03 04:33:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12536 states, 12535 states have (on average 1.4035101715197447) internal successors, (17593), 12535 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states 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 04:33:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12536 states to 12536 states and 17593 transitions. [2021-11-03 04:33:36,315 INFO L78 Accepts]: Start accepts. Automaton has 12536 states and 17593 transitions. Word has length 136 [2021-11-03 04:33:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:36,315 INFO L470 AbstractCegarLoop]: Abstraction has 12536 states and 17593 transitions. [2021-11-03 04:33:36,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 12536 states and 17593 transitions. [2021-11-03 04:33:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 04:33:36,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:36,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:36,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-03 04:33:36,318 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1613279942, now seen corresponding path program 1 times [2021-11-03 04:33:36,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:33:36,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270414481] [2021-11-03 04:33:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:36,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:33:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:42,938 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 04:33:42,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:33:42,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270414481] [2021-11-03 04:33:42,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270414481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:42,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:42,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-11-03 04:33:42,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674157610] [2021-11-03 04:33:42,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-03 04:33:42,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:33:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-03 04:33:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 04:33:42,941 INFO L87 Difference]: Start difference. First operand 12536 states and 17593 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 40 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:01,236 INFO L93 Difference]: Finished difference Result 22425 states and 31888 transitions. [2021-11-03 04:34:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-03 04:34:01,251 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 40 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-03 04:34:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:01,285 INFO L225 Difference]: With dead ends: 22425 [2021-11-03 04:34:01,285 INFO L226 Difference]: Without dead ends: 17470 [2021-11-03 04:34:01,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1184, Invalid=5956, Unknown=0, NotChecked=0, Total=7140 [2021-11-03 04:34:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17470 states. [2021-11-03 04:34:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17470 to 13791. [2021-11-03 04:34:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13791 states, 13790 states have (on average 1.407324147933285) internal successors, (19407), 13790 states have internal predecessors, (19407), 0 states have call successors, (0), 0 states 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 04:34:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13791 states to 13791 states and 19407 transitions. [2021-11-03 04:34:03,497 INFO L78 Accepts]: Start accepts. Automaton has 13791 states and 19407 transitions. Word has length 136 [2021-11-03 04:34:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:03,498 INFO L470 AbstractCegarLoop]: Abstraction has 13791 states and 19407 transitions. [2021-11-03 04:34:03,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 40 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 13791 states and 19407 transitions. [2021-11-03 04:34:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 04:34:03,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:03,500 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:03,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-03 04:34:03,500 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2132450326, now seen corresponding path program 1 times [2021-11-03 04:34:03,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:03,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40252086] [2021-11-03 04:34:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:03,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:08,963 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 04:34:08,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:08,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40252086] [2021-11-03 04:34:08,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40252086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:08,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:08,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-11-03 04:34:08,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190720403] [2021-11-03 04:34:08,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-03 04:34:08,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:08,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-03 04:34:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 04:34:08,966 INFO L87 Difference]: Start difference. First operand 13791 states and 19407 transitions. Second operand has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:23,669 INFO L93 Difference]: Finished difference Result 19643 states and 27692 transitions. [2021-11-03 04:34:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-03 04:34:23,670 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-03 04:34:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:23,693 INFO L225 Difference]: With dead ends: 19643 [2021-11-03 04:34:23,693 INFO L226 Difference]: Without dead ends: 16899 [2021-11-03 04:34:23,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=756, Invalid=4646, Unknown=0, NotChecked=0, Total=5402 [2021-11-03 04:34:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16899 states. [2021-11-03 04:34:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16899 to 14875. [2021-11-03 04:34:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14875 states, 14874 states have (on average 1.410918381067635) internal successors, (20986), 14874 states have internal predecessors, (20986), 0 states have call successors, (0), 0 states 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 04:34:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14875 states to 14875 states and 20986 transitions. [2021-11-03 04:34:25,789 INFO L78 Accepts]: Start accepts. Automaton has 14875 states and 20986 transitions. Word has length 136 [2021-11-03 04:34:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:25,790 INFO L470 AbstractCegarLoop]: Abstraction has 14875 states and 20986 transitions. [2021-11-03 04:34:25,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 14875 states and 20986 transitions. [2021-11-03 04:34:25,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 04:34:25,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:25,792 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:25,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-03 04:34:25,792 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:25,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:25,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1375780472, now seen corresponding path program 1 times [2021-11-03 04:34:25,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:25,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981292182] [2021-11-03 04:34:25,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:25,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:32,517 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 04:34:32,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:32,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981292182] [2021-11-03 04:34:32,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981292182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:32,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:32,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-11-03 04:34:32,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7203078] [2021-11-03 04:34:32,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-03 04:34:32,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-03 04:34:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1579, Unknown=0, NotChecked=0, Total=1722 [2021-11-03 04:34:32,520 INFO L87 Difference]: Start difference. First operand 14875 states and 20986 transitions. Second operand has 42 states, 42 states have (on average 3.238095238095238) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:55,589 INFO L93 Difference]: Finished difference Result 19999 states and 28164 transitions. [2021-11-03 04:34:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-03 04:34:55,595 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.238095238095238) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-03 04:34:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:55,616 INFO L225 Difference]: With dead ends: 19999 [2021-11-03 04:34:55,616 INFO L226 Difference]: Without dead ends: 17332 [2021-11-03 04:34:55,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=1326, Invalid=7046, Unknown=0, NotChecked=0, Total=8372 [2021-11-03 04:34:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17332 states. [2021-11-03 04:34:57,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17332 to 15468. [2021-11-03 04:34:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15468 states, 15467 states have (on average 1.413396263011573) internal successors, (21861), 15467 states have internal predecessors, (21861), 0 states have call successors, (0), 0 states 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 04:34:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15468 states to 15468 states and 21861 transitions. [2021-11-03 04:34:57,770 INFO L78 Accepts]: Start accepts. Automaton has 15468 states and 21861 transitions. Word has length 136 [2021-11-03 04:34:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:57,770 INFO L470 AbstractCegarLoop]: Abstraction has 15468 states and 21861 transitions. [2021-11-03 04:34:57,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.238095238095238) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 15468 states and 21861 transitions. [2021-11-03 04:34:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 04:34:57,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:57,773 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:57,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-03 04:34:57,773 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1052402738, now seen corresponding path program 1 times [2021-11-03 04:34:57,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:57,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111581049] [2021-11-03 04:34:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:57,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:01,863 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 04:35:01,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:01,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111581049] [2021-11-03 04:35:01,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111581049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:01,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:01,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-11-03 04:35:01,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201991552] [2021-11-03 04:35:01,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-03 04:35:01,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-03 04:35:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 04:35:01,865 INFO L87 Difference]: Start difference. First operand 15468 states and 21861 transitions. Second operand has 37 states, 37 states have (on average 3.675675675675676) internal successors, (136), 36 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:13,125 INFO L93 Difference]: Finished difference Result 19875 states and 28019 transitions. [2021-11-03 04:35:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-03 04:35:13,127 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.675675675675676) internal successors, (136), 36 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-03 04:35:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:13,146 INFO L225 Difference]: With dead ends: 19875 [2021-11-03 04:35:13,146 INFO L226 Difference]: Without dead ends: 17267 [2021-11-03 04:35:13,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=663, Invalid=4029, Unknown=0, NotChecked=0, Total=4692 [2021-11-03 04:35:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17267 states. [2021-11-03 04:35:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17267 to 15632. [2021-11-03 04:35:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15632 states, 15631 states have (on average 1.4098906020088287) internal successors, (22038), 15631 states have internal predecessors, (22038), 0 states have call successors, (0), 0 states 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 04:35:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15632 states to 15632 states and 22038 transitions. [2021-11-03 04:35:15,356 INFO L78 Accepts]: Start accepts. Automaton has 15632 states and 22038 transitions. Word has length 136 [2021-11-03 04:35:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:15,356 INFO L470 AbstractCegarLoop]: Abstraction has 15632 states and 22038 transitions. [2021-11-03 04:35:15,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.675675675675676) internal successors, (136), 36 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:15,356 INFO L276 IsEmpty]: Start isEmpty. Operand 15632 states and 22038 transitions. [2021-11-03 04:35:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-03 04:35:15,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:15,359 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:15,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-03 04:35:15,359 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1778686565, now seen corresponding path program 1 times [2021-11-03 04:35:15,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:15,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549973229] [2021-11-03 04:35:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:15,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:15,424 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 04:35:15,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:15,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549973229] [2021-11-03 04:35:15,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549973229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:15,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:15,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:35:15,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461966461] [2021-11-03 04:35:15,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:35:15,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:15,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:35:15,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:35:15,427 INFO L87 Difference]: Start difference. First operand 15632 states and 22038 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:18,500 INFO L93 Difference]: Finished difference Result 26655 states and 37738 transitions. [2021-11-03 04:35:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:35:18,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-03 04:35:18,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:18,525 INFO L225 Difference]: With dead ends: 26655 [2021-11-03 04:35:18,525 INFO L226 Difference]: Without dead ends: 20901 [2021-11-03 04:35:18,533 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 04:35:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20901 states. [2021-11-03 04:35:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20901 to 20899. [2021-11-03 04:35:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20899 states, 20898 states have (on average 1.3979328165374676) internal successors, (29214), 20898 states have internal predecessors, (29214), 0 states have call successors, (0), 0 states 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 04:35:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20899 states to 20899 states and 29214 transitions. [2021-11-03 04:35:21,556 INFO L78 Accepts]: Start accepts. Automaton has 20899 states and 29214 transitions. Word has length 137 [2021-11-03 04:35:21,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:21,556 INFO L470 AbstractCegarLoop]: Abstraction has 20899 states and 29214 transitions. [2021-11-03 04:35:21,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20899 states and 29214 transitions. [2021-11-03 04:35:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-03 04:35:21,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:21,560 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:21,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-03 04:35:21,560 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2089885939, now seen corresponding path program 1 times [2021-11-03 04:35:21,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:21,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396919919] [2021-11-03 04:35:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:21,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:22,685 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 04:35:22,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:22,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396919919] [2021-11-03 04:35:22,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396919919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:22,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:22,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-03 04:35:22,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363411805] [2021-11-03 04:35:22,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 04:35:22,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:22,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 04:35:22,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:35:22,687 INFO L87 Difference]: Start difference. First operand 20899 states and 29214 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:27,499 INFO L93 Difference]: Finished difference Result 25243 states and 35108 transitions. [2021-11-03 04:35:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 04:35:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-03 04:35:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:27,524 INFO L225 Difference]: With dead ends: 25243 [2021-11-03 04:35:27,525 INFO L226 Difference]: Without dead ends: 21223 [2021-11-03 04:35:27,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-11-03 04:35:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21223 states. [2021-11-03 04:35:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21223 to 20917. [2021-11-03 04:35:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20917 states, 20916 states have (on average 1.3979250334672022) internal successors, (29239), 20916 states have internal predecessors, (29239), 0 states have call successors, (0), 0 states 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 04:35:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20917 states to 20917 states and 29239 transitions. [2021-11-03 04:35:30,567 INFO L78 Accepts]: Start accepts. Automaton has 20917 states and 29239 transitions. Word has length 138 [2021-11-03 04:35:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:30,567 INFO L470 AbstractCegarLoop]: Abstraction has 20917 states and 29239 transitions. [2021-11-03 04:35:30,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20917 states and 29239 transitions. [2021-11-03 04:35:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-03 04:35:30,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:30,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:30,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-03 04:35:30,571 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:30,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:30,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1194357967, now seen corresponding path program 1 times [2021-11-03 04:35:30,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:30,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322632478] [2021-11-03 04:35:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:30,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:31,606 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 04:35:31,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:31,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322632478] [2021-11-03 04:35:31,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322632478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:31,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:31,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-03 04:35:31,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14454031] [2021-11-03 04:35:31,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 04:35:31,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:31,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 04:35:31,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:35:31,623 INFO L87 Difference]: Start difference. First operand 20917 states and 29239 transitions. Second operand has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:36,972 INFO L93 Difference]: Finished difference Result 25272 states and 35151 transitions. [2021-11-03 04:35:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 04:35:36,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-03 04:35:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:36,996 INFO L225 Difference]: With dead ends: 25272 [2021-11-03 04:35:36,996 INFO L226 Difference]: Without dead ends: 21298 [2021-11-03 04:35:37,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 04:35:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21298 states. [2021-11-03 04:35:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21298 to 20978. [2021-11-03 04:35:40,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 1.3972446012299184) internal successors, (29310), 20977 states have internal predecessors, (29310), 0 states have call successors, (0), 0 states 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 04:35:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 29310 transitions. [2021-11-03 04:35:40,051 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 29310 transitions. Word has length 138 [2021-11-03 04:35:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:40,051 INFO L470 AbstractCegarLoop]: Abstraction has 20978 states and 29310 transitions. [2021-11-03 04:35:40,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 29310 transitions. [2021-11-03 04:35:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-03 04:35:40,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:40,054 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:40,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-03 04:35:40,055 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:40,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1917662611, now seen corresponding path program 1 times [2021-11-03 04:35:40,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:40,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70921392] [2021-11-03 04:35:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:40,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:41,077 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 04:35:41,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:41,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70921392] [2021-11-03 04:35:41,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70921392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:41,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:41,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-03 04:35:41,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852165673] [2021-11-03 04:35:41,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 04:35:41,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 04:35:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:35:41,079 INFO L87 Difference]: Start difference. First operand 20978 states and 29310 transitions. Second operand has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:46,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:46,225 INFO L93 Difference]: Finished difference Result 25420 states and 35309 transitions. [2021-11-03 04:35:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-03 04:35:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-03 04:35:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:46,249 INFO L225 Difference]: With dead ends: 25420 [2021-11-03 04:35:46,249 INFO L226 Difference]: Without dead ends: 21448 [2021-11-03 04:35:46,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-11-03 04:35:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21448 states. [2021-11-03 04:35:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21448 to 21044. [2021-11-03 04:35:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21044 states, 21043 states have (on average 1.3965689302856057) internal successors, (29388), 21043 states have internal predecessors, (29388), 0 states have call successors, (0), 0 states 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 04:35:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21044 states to 21044 states and 29388 transitions. [2021-11-03 04:35:49,520 INFO L78 Accepts]: Start accepts. Automaton has 21044 states and 29388 transitions. Word has length 138 [2021-11-03 04:35:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:49,520 INFO L470 AbstractCegarLoop]: Abstraction has 21044 states and 29388 transitions. [2021-11-03 04:35:49,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 18 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 21044 states and 29388 transitions. [2021-11-03 04:35:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-03 04:35:49,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:49,524 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:49,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-03 04:35:49,524 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1115880815, now seen corresponding path program 1 times [2021-11-03 04:35:49,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:49,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219815402] [2021-11-03 04:35:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:49,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:50,658 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 04:35:50,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:50,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219815402] [2021-11-03 04:35:50,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219815402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:50,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:50,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-03 04:35:50,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498769305] [2021-11-03 04:35:50,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 04:35:50,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 04:35:50,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:35:50,662 INFO L87 Difference]: Start difference. First operand 21044 states and 29388 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:56,704 INFO L93 Difference]: Finished difference Result 25376 states and 35278 transitions. [2021-11-03 04:35:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-03 04:35:56,705 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-03 04:35:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:56,732 INFO L225 Difference]: With dead ends: 25376 [2021-11-03 04:35:56,732 INFO L226 Difference]: Without dead ends: 21353 [2021-11-03 04:35:56,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=393, Invalid=1247, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 04:35:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21353 states. [2021-11-03 04:35:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21353 to 21065. [2021-11-03 04:35:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21065 states, 21064 states have (on average 1.3961735662742119) internal successors, (29409), 21064 states have internal predecessors, (29409), 0 states have call successors, (0), 0 states 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 04:35:59,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21065 states to 21065 states and 29409 transitions. [2021-11-03 04:35:59,952 INFO L78 Accepts]: Start accepts. Automaton has 21065 states and 29409 transitions. Word has length 138 [2021-11-03 04:35:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:59,952 INFO L470 AbstractCegarLoop]: Abstraction has 21065 states and 29409 transitions. [2021-11-03 04:35:59,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 21065 states and 29409 transitions. [2021-11-03 04:35:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-03 04:35:59,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:59,956 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:59,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-03 04:35:59,956 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash -885645215, now seen corresponding path program 1 times [2021-11-03 04:35:59,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:59,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582458081] [2021-11-03 04:35:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:59,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:01,715 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 04:36:01,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:01,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582458081] [2021-11-03 04:36:01,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582458081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:01,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:01,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-03 04:36:01,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104297954] [2021-11-03 04:36:01,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-03 04:36:01,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-03 04:36:01,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-11-03 04:36:01,718 INFO L87 Difference]: Start difference. First operand 21065 states and 29409 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:09,627 INFO L93 Difference]: Finished difference Result 24178 states and 33565 transitions. [2021-11-03 04:36:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-03 04:36:09,627 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-03 04:36:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:09,652 INFO L225 Difference]: With dead ends: 24178 [2021-11-03 04:36:09,653 INFO L226 Difference]: Without dead ends: 21496 [2021-11-03 04:36:09,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=421, Invalid=1559, Unknown=0, NotChecked=0, Total=1980 [2021-11-03 04:36:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21496 states. [2021-11-03 04:36:12,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21496 to 21087. [2021-11-03 04:36:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21087 states, 21086 states have (on average 1.3959499193777862) internal successors, (29435), 21086 states have internal predecessors, (29435), 0 states have call successors, (0), 0 states 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 04:36:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21087 states to 21087 states and 29435 transitions. [2021-11-03 04:36:12,759 INFO L78 Accepts]: Start accepts. Automaton has 21087 states and 29435 transitions. Word has length 138 [2021-11-03 04:36:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:12,760 INFO L470 AbstractCegarLoop]: Abstraction has 21087 states and 29435 transitions. [2021-11-03 04:36:12,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 21087 states and 29435 transitions. [2021-11-03 04:36:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-03 04:36:12,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:12,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:12,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-03 04:36:12,763 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1112435393, now seen corresponding path program 1 times [2021-11-03 04:36:12,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:12,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228917393] [2021-11-03 04:36:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:12,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:13,784 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 04:36:13,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:13,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228917393] [2021-11-03 04:36:13,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228917393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:13,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:13,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-03 04:36:13,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242000487] [2021-11-03 04:36:13,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 04:36:13,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 04:36:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:36:13,786 INFO L87 Difference]: Start difference. First operand 21087 states and 29435 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:18,956 INFO L93 Difference]: Finished difference Result 25340 states and 35232 transitions. [2021-11-03 04:36:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 04:36:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-03 04:36:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:18,984 INFO L225 Difference]: With dead ends: 25340 [2021-11-03 04:36:18,984 INFO L226 Difference]: Without dead ends: 21325 [2021-11-03 04:36:18,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 04:36:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21325 states. [2021-11-03 04:36:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21325 to 21098. [2021-11-03 04:36:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21098 states, 21097 states have (on average 1.3956012703227947) internal successors, (29443), 21097 states have internal predecessors, (29443), 0 states have call successors, (0), 0 states 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 04:36:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21098 states to 21098 states and 29443 transitions. [2021-11-03 04:36:22,086 INFO L78 Accepts]: Start accepts. Automaton has 21098 states and 29443 transitions. Word has length 138 [2021-11-03 04:36:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:22,087 INFO L470 AbstractCegarLoop]: Abstraction has 21098 states and 29443 transitions. [2021-11-03 04:36:22,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 21098 states and 29443 transitions. [2021-11-03 04:36:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-03 04:36:22,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:22,090 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:22,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-03 04:36:22,090 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:22,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:22,091 INFO L85 PathProgramCache]: Analyzing trace with hash -692313609, now seen corresponding path program 1 times [2021-11-03 04:36:22,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:22,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666799073] [2021-11-03 04:36:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:22,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:23,284 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 04:36:23,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:23,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666799073] [2021-11-03 04:36:23,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666799073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:23,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:23,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-03 04:36:23,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633338379] [2021-11-03 04:36:23,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-03 04:36:23,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:23,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-03 04:36:23,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-11-03 04:36:23,285 INFO L87 Difference]: Start difference. First operand 21098 states and 29443 transitions. Second operand has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:40,694 INFO L93 Difference]: Finished difference Result 106584 states and 153945 transitions. [2021-11-03 04:36:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-03 04:36:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-03 04:36:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:40,836 INFO L225 Difference]: With dead ends: 106584 [2021-11-03 04:36:40,836 INFO L226 Difference]: Without dead ends: 87830 [2021-11-03 04:36:40,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=955, Invalid=2351, Unknown=0, NotChecked=0, Total=3306 [2021-11-03 04:36:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87830 states. [2021-11-03 04:36:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87830 to 55626. [2021-11-03 04:36:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55626 states, 55625 states have (on average 1.4339595505617977) internal successors, (79764), 55625 states have internal predecessors, (79764), 0 states have call successors, (0), 0 states 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 04:36:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55626 states to 55626 states and 79764 transitions. [2021-11-03 04:36:51,315 INFO L78 Accepts]: Start accepts. Automaton has 55626 states and 79764 transitions. Word has length 139 [2021-11-03 04:36:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:51,315 INFO L470 AbstractCegarLoop]: Abstraction has 55626 states and 79764 transitions. [2021-11-03 04:36:51,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 55626 states and 79764 transitions. [2021-11-03 04:36:51,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-03 04:36:51,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:51,319 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] [2021-11-03 04:36:51,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-03 04:36:51,319 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:51,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:51,320 INFO L85 PathProgramCache]: Analyzing trace with hash -849241431, now seen corresponding path program 1 times [2021-11-03 04:36:51,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:51,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008257361] [2021-11-03 04:36:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:51,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:52,775 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 04:36:52,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:52,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008257361] [2021-11-03 04:36:52,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008257361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:52,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:52,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-03 04:36:52,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985326640] [2021-11-03 04:36:52,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-03 04:36:52,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-03 04:36:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-11-03 04:36:52,777 INFO L87 Difference]: Start difference. First operand 55626 states and 79764 transitions. Second operand has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 26 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:08,239 INFO L93 Difference]: Finished difference Result 85281 states and 122399 transitions. [2021-11-03 04:37:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-03 04:37:08,240 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 26 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-03 04:37:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:08,362 INFO L225 Difference]: With dead ends: 85281 [2021-11-03 04:37:08,362 INFO L226 Difference]: Without dead ends: 69626 [2021-11-03 04:37:08,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=686, Invalid=1864, Unknown=0, NotChecked=0, Total=2550 [2021-11-03 04:37:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69626 states.