./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF --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 aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:06:56,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:06:56,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:06:57,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:06:57,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:06:57,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:06:57,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:06:57,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:06:57,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:06:57,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:06:57,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:06:57,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:06:57,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:06:57,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:06:57,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:06:57,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:06:57,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:06:57,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:06:57,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:06:57,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:06:57,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:06:57,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:06:57,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:06:57,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:06:57,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:06:57,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:06:57,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:06:57,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:06:57,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:06:57,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:06:57,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:06:57,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:06:57,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:06:57,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:06:57,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:06:57,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:06:57,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:06:57,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:06:57,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:06:57,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:06:57,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:06:57,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:06:57,106 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:06:57,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:06:57,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:06:57,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:06:57,109 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:06:57,109 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:06:57,109 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:06:57,110 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:06:57,110 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:06:57,110 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:06:57,111 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:06:57,111 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:06:57,111 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:06:57,112 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:06:57,112 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:06:57,113 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:06:57,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:06:57,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:06:57,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:06:57,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:06:57,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:06:57,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:06:57,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:06:57,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:06:57,116 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:06:57,117 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:06:57,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:06:57,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:06:57,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:06:57,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:06:57,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:06:57,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:06:57,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:06:57,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:06:57,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:06:57,120 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:06:57,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:06:57,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:06:57,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:06:57,121 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:06:57,121 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_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 [2021-11-12 23:06:57,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:06:57,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:06:57,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:06:57,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:06:57,448 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:06:57,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/eca-rers2018/Problem10.c [2021-11-12 23:06:57,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/data/49f9021f7/f96ac3c8c9ec45fca4043deb78608b1c/FLAGb234788ce [2021-11-12 23:06:58,284 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:06:58,284 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/sv-benchmarks/c/eca-rers2018/Problem10.c [2021-11-12 23:06:58,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/data/49f9021f7/f96ac3c8c9ec45fca4043deb78608b1c/FLAGb234788ce [2021-11-12 23:06:58,462 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/data/49f9021f7/f96ac3c8c9ec45fca4043deb78608b1c [2021-11-12 23:06:58,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:06:58,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:06:58,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:58,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:06:58,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:06:58,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:58" (1/1) ... [2021-11-12 23:06:58,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c158b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:58, skipping insertion in model container [2021-11-12 23:06:58,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:58" (1/1) ... [2021-11-12 23:06:58,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:06:58,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:06:58,791 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_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2021-11-12 23:06:58,796 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_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2021-11-12 23:06:59,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:59,420 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:06:59,433 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_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2021-11-12 23:06:59,433 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_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2021-11-12 23:06:59,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:59,633 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:06:59,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59 WrapperNode [2021-11-12 23:06:59,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:59,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:06:59,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:06:59,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:06:59,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:06:59,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:06:59,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:06:59,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:06:59,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:06:59,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:06:59,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:06:59,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:06:59,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (1/1) ... [2021-11-12 23:06:59,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:06:59,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:59,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:06:59,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:06:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:06:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2021-11-12 23:06:59,982 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2021-11-12 23:06:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2021-11-12 23:06:59,983 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2021-11-12 23:06:59,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:06:59,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:06:59,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:07:03,080 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:07:03,080 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:07:03,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:03 BoogieIcfgContainer [2021-11-12 23:07:03,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:07:03,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:07:03,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:07:03,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:07:03,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:06:58" (1/3) ... [2021-11-12 23:07:03,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c0af36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:03, skipping insertion in model container [2021-11-12 23:07:03,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:59" (2/3) ... [2021-11-12 23:07:03,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c0af36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:03, skipping insertion in model container [2021-11-12 23:07:03,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:03" (3/3) ... [2021-11-12 23:07:03,101 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10.c [2021-11-12 23:07:03,108 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:07:03,109 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:07:03,173 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:07:03,182 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 [2021-11-12 23:07:03,182 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:07:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 207 states have (on average 1.502415458937198) internal successors, (311), 209 states have internal predecessors, (311), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:07:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 23:07:03,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:03,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 23:07:03,261 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:03,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1927163450, now seen corresponding path program 1 times [2021-11-12 23:07:03,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:03,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164726177] [2021-11-12 23:07:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:03,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:04,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:04,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164726177] [2021-11-12 23:07:04,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164726177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:04,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:04,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:04,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303017654] [2021-11-12 23:07:04,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:04,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:04,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:04,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:04,200 INFO L87 Difference]: Start difference. First operand has 312 states, 207 states have (on average 1.502415458937198) internal successors, (311), 209 states have internal predecessors, (311), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:05,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:05,022 INFO L93 Difference]: Finished difference Result 527 states and 926 transitions. [2021-11-12 23:07:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-12 23:07:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:05,041 INFO L225 Difference]: With dead ends: 527 [2021-11-12 23:07:05,041 INFO L226 Difference]: Without dead ends: 212 [2021-11-12 23:07:05,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:05,052 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 302 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 502.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.91ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 604.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:05,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 276 Invalid, 333 Unknown, 0 Unchecked, 17.91ms Time], IncrementalHoareTripleChecker [10 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 604.26ms Time] [2021-11-12 23:07:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-12 23:07:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2021-11-12 23:07:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 106 states have (on average 1.9245283018867925) internal successors, (204), 203 states have internal predecessors, (204), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 302 transitions. [2021-11-12 23:07:05,119 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 302 transitions. Word has length 6 [2021-11-12 23:07:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:05,119 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 302 transitions. [2021-11-12 23:07:05,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 302 transitions. [2021-11-12 23:07:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:07:05,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:05,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:05,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:07:05,121 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:05,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash -388192148, now seen corresponding path program 1 times [2021-11-12 23:07:05,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:05,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665216953] [2021-11-12 23:07:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:05,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:05,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:05,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665216953] [2021-11-12 23:07:05,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665216953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:05,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:05,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:05,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011567580] [2021-11-12 23:07:05,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:05,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:05,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:05,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:05,555 INFO L87 Difference]: Start difference. First operand 206 states and 302 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:06,124 INFO L93 Difference]: Finished difference Result 210 states and 305 transitions. [2021-11-12 23:07:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:06,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:07:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:06,128 INFO L225 Difference]: With dead ends: 210 [2021-11-12 23:07:06,129 INFO L226 Difference]: Without dead ends: 206 [2021-11-12 23:07:06,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:06,131 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 296 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 432.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 531.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:06,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 292 Invalid, 306 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [3 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 531.68ms Time] [2021-11-12 23:07:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-12 23:07:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2021-11-12 23:07:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 106 states have (on average 1.9056603773584906) internal successors, (202), 201 states have internal predecessors, (202), 96 states have call successors, (96), 2 states have call predecessors, (96), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 298 transitions. [2021-11-12 23:07:06,155 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 298 transitions. Word has length 7 [2021-11-12 23:07:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:06,155 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 298 transitions. [2021-11-12 23:07:06,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:06,156 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 298 transitions. [2021-11-12 23:07:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:07:06,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:06,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:06,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:07:06,157 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash 850235135, now seen corresponding path program 1 times [2021-11-12 23:07:06,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:06,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748639465] [2021-11-12 23:07:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:06,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:06,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:06,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748639465] [2021-11-12 23:07:06,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748639465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:06,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:06,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:06,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2992443] [2021-11-12 23:07:06,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:06,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:06,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:06,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:06,357 INFO L87 Difference]: Start difference. First operand 204 states and 298 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:06,994 INFO L93 Difference]: Finished difference Result 208 states and 301 transitions. [2021-11-12 23:07:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:07:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:06,998 INFO L225 Difference]: With dead ends: 208 [2021-11-12 23:07:06,998 INFO L226 Difference]: Without dead ends: 204 [2021-11-12 23:07:06,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:07,000 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 291 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 511.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 597.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:07,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 290 Invalid, 300 Unknown, 0 Unchecked, 5.39ms Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 597.99ms Time] [2021-11-12 23:07:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-12 23:07:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2021-11-12 23:07:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 106 states have (on average 1.8867924528301887) internal successors, (200), 199 states have internal predecessors, (200), 94 states have call successors, (94), 2 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 294 transitions. [2021-11-12 23:07:07,042 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 294 transitions. Word has length 8 [2021-11-12 23:07:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:07,042 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 294 transitions. [2021-11-12 23:07:07,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 294 transitions. [2021-11-12 23:07:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:07:07,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:07,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:07,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:07:07,044 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash 586782033, now seen corresponding path program 1 times [2021-11-12 23:07:07,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:07,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430218583] [2021-11-12 23:07:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:07,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:07,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:07,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430218583] [2021-11-12 23:07:07,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430218583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:07,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:07,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:07,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123625106] [2021-11-12 23:07:07,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:07,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:07,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:07,289 INFO L87 Difference]: Start difference. First operand 202 states and 294 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:07,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:07,795 INFO L93 Difference]: Finished difference Result 210 states and 299 transitions. [2021-11-12 23:07:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:07,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-12 23:07:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:07,801 INFO L225 Difference]: With dead ends: 210 [2021-11-12 23:07:07,801 INFO L226 Difference]: Without dead ends: 206 [2021-11-12 23:07:07,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:07,803 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 288 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 356.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.29ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 472.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:07,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 264 Invalid, 320 Unknown, 0 Unchecked, 4.29ms Time], IncrementalHoareTripleChecker [11 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 472.21ms Time] [2021-11-12 23:07:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-12 23:07:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-11-12 23:07:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 106 states have (on average 1.8679245283018868) internal successors, (198), 197 states have internal predecessors, (198), 92 states have call successors, (92), 2 states have call predecessors, (92), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 290 transitions. [2021-11-12 23:07:07,828 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 290 transitions. Word has length 9 [2021-11-12 23:07:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:07,829 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 290 transitions. [2021-11-12 23:07:07,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:07,829 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 290 transitions. [2021-11-12 23:07:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 23:07:07,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:07,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:07,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:07:07,831 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:07,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:07,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1009677255, now seen corresponding path program 1 times [2021-11-12 23:07:07,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:07,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965575638] [2021-11-12 23:07:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:07,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:08,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:08,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965575638] [2021-11-12 23:07:08,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965575638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:08,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:08,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:08,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876806701] [2021-11-12 23:07:08,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:08,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:08,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:08,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:08,205 INFO L87 Difference]: Start difference. First operand 200 states and 290 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:08,779 INFO L93 Difference]: Finished difference Result 400 states and 579 transitions. [2021-11-12 23:07:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 23:07:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:08,783 INFO L225 Difference]: With dead ends: 400 [2021-11-12 23:07:08,783 INFO L226 Difference]: Without dead ends: 397 [2021-11-12 23:07:08,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:08,786 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 283 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 423.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.43ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 515.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:08,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 559 Invalid, 305 Unknown, 0 Unchecked, 7.43ms Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 515.14ms Time] [2021-11-12 23:07:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-12 23:07:08,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 207. [2021-11-12 23:07:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 113 states have (on average 1.8141592920353982) internal successors, (205), 204 states have internal predecessors, (205), 92 states have call successors, (92), 2 states have call predecessors, (92), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 297 transitions. [2021-11-12 23:07:08,813 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 297 transitions. Word has length 10 [2021-11-12 23:07:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:08,814 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 297 transitions. [2021-11-12 23:07:08,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 297 transitions. [2021-11-12 23:07:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:07:08,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:08,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:08,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:07:08,816 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:08,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1234533942, now seen corresponding path program 1 times [2021-11-12 23:07:08,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:08,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034473465] [2021-11-12 23:07:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:08,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:09,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:09,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034473465] [2021-11-12 23:07:09,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034473465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:09,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:09,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:09,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570361322] [2021-11-12 23:07:09,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:09,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:09,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:09,048 INFO L87 Difference]: Start difference. First operand 207 states and 297 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:09,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:09,614 INFO L93 Difference]: Finished difference Result 209 states and 298 transitions. [2021-11-12 23:07:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:09,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-12 23:07:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:09,617 INFO L225 Difference]: With dead ends: 209 [2021-11-12 23:07:09,617 INFO L226 Difference]: Without dead ends: 205 [2021-11-12 23:07:09,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:09,619 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 280 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.24ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 526.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:09,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 270 Invalid, 304 Unknown, 0 Unchecked, 4.24ms Time], IncrementalHoareTripleChecker [3 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 526.77ms Time] [2021-11-12 23:07:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-12 23:07:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-11-12 23:07:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 113 states have (on average 1.7964601769911503) internal successors, (203), 202 states have internal predecessors, (203), 90 states have call successors, (90), 2 states have call predecessors, (90), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 293 transitions. [2021-11-12 23:07:09,643 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 293 transitions. Word has length 11 [2021-11-12 23:07:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:09,643 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 293 transitions. [2021-11-12 23:07:09,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 293 transitions. [2021-11-12 23:07:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 23:07:09,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:09,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:09,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:07:09,646 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:09,646 INFO L85 PathProgramCache]: Analyzing trace with hash -384836468, now seen corresponding path program 1 times [2021-11-12 23:07:09,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:09,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562514683] [2021-11-12 23:07:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:09,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:09,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:09,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562514683] [2021-11-12 23:07:09,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562514683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:09,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:09,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:09,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630438966] [2021-11-12 23:07:09,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:09,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:09,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:09,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:09,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:09,828 INFO L87 Difference]: Start difference. First operand 205 states and 293 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:10,378 INFO L93 Difference]: Finished difference Result 397 states and 570 transitions. [2021-11-12 23:07:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:10,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-12 23:07:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:10,383 INFO L225 Difference]: With dead ends: 397 [2021-11-12 23:07:10,383 INFO L226 Difference]: Without dead ends: 391 [2021-11-12 23:07:10,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:10,385 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 273 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 404.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.77ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 489.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:10,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 551 Invalid, 304 Unknown, 0 Unchecked, 5.77ms Time], IncrementalHoareTripleChecker [5 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 489.32ms Time] [2021-11-12 23:07:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-12 23:07:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 278. [2021-11-12 23:07:10,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 186 states have (on average 1.8387096774193548) internal successors, (342), 275 states have internal predecessors, (342), 90 states have call successors, (90), 2 states have call predecessors, (90), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 432 transitions. [2021-11-12 23:07:10,414 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 432 transitions. Word has length 12 [2021-11-12 23:07:10,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:10,414 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 432 transitions. [2021-11-12 23:07:10,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 432 transitions. [2021-11-12 23:07:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:07:10,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:10,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:10,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:07:10,417 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:10,418 INFO L85 PathProgramCache]: Analyzing trace with hash 954295067, now seen corresponding path program 1 times [2021-11-12 23:07:10,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:10,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517004298] [2021-11-12 23:07:10,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:10,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:10,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:10,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517004298] [2021-11-12 23:07:10,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517004298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:10,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:10,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:10,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184430999] [2021-11-12 23:07:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:10,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:10,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:10,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:10,583 INFO L87 Difference]: Start difference. First operand 278 states and 432 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:11,170 INFO L93 Difference]: Finished difference Result 390 states and 560 transitions. [2021-11-12 23:07:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:11,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-12 23:07:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:11,175 INFO L225 Difference]: With dead ends: 390 [2021-11-12 23:07:11,175 INFO L226 Difference]: Without dead ends: 386 [2021-11-12 23:07:11,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:11,177 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 270 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 392.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.97ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 527.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:11,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 507 Invalid, 333 Unknown, 0 Unchecked, 4.97ms Time], IncrementalHoareTripleChecker [20 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 527.37ms Time] [2021-11-12 23:07:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-12 23:07:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 278. [2021-11-12 23:07:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 186 states have (on average 1.8279569892473118) internal successors, (340), 275 states have internal predecessors, (340), 90 states have call successors, (90), 2 states have call predecessors, (90), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 430 transitions. [2021-11-12 23:07:11,207 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 430 transitions. Word has length 13 [2021-11-12 23:07:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:11,208 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 430 transitions. [2021-11-12 23:07:11,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 430 transitions. [2021-11-12 23:07:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:07:11,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:11,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:11,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:07:11,210 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:11,210 INFO L85 PathProgramCache]: Analyzing trace with hash -482293426, now seen corresponding path program 1 times [2021-11-12 23:07:11,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:11,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775332877] [2021-11-12 23:07:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:11,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:11,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:11,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775332877] [2021-11-12 23:07:11,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775332877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:11,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:11,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:11,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254290539] [2021-11-12 23:07:11,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:11,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:11,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:11,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:11,365 INFO L87 Difference]: Start difference. First operand 278 states and 430 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:11,883 INFO L93 Difference]: Finished difference Result 284 states and 433 transitions. [2021-11-12 23:07:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:11,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-12 23:07:11,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:11,886 INFO L225 Difference]: With dead ends: 284 [2021-11-12 23:07:11,886 INFO L226 Difference]: Without dead ends: 279 [2021-11-12 23:07:11,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:11,888 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 273 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 388.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 465.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:11,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 257 Invalid, 308 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [12 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 465.80ms Time] [2021-11-12 23:07:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-12 23:07:11,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2021-11-12 23:07:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 186 states have (on average 1.8010752688172043) internal successors, (335), 272 states have internal predecessors, (335), 87 states have call successors, (87), 2 states have call predecessors, (87), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 422 transitions. [2021-11-12 23:07:11,920 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 422 transitions. Word has length 14 [2021-11-12 23:07:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:11,920 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 422 transitions. [2021-11-12 23:07:11,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 422 transitions. [2021-11-12 23:07:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:07:11,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:11,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:11,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:07:11,923 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:11,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2066856960, now seen corresponding path program 1 times [2021-11-12 23:07:11,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:11,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223857927] [2021-11-12 23:07:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:11,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:12,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:12,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223857927] [2021-11-12 23:07:12,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223857927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:12,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:12,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:12,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425358546] [2021-11-12 23:07:12,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:12,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:12,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:12,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:12,155 INFO L87 Difference]: Start difference. First operand 275 states and 422 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:12,693 INFO L93 Difference]: Finished difference Result 277 states and 423 transitions. [2021-11-12 23:07:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:12,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-12 23:07:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:12,699 INFO L225 Difference]: With dead ends: 277 [2021-11-12 23:07:12,699 INFO L226 Difference]: Without dead ends: 273 [2021-11-12 23:07:12,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:12,700 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 266 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 408.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 488.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:12,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 268 Invalid, 286 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 488.79ms Time] [2021-11-12 23:07:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-12 23:07:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-11-12 23:07:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 186 states have (on average 1.7795698924731183) internal successors, (331), 270 states have internal predecessors, (331), 85 states have call successors, (85), 2 states have call predecessors, (85), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 416 transitions. [2021-11-12 23:07:12,727 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 416 transitions. Word has length 15 [2021-11-12 23:07:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:12,727 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 416 transitions. [2021-11-12 23:07:12,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 416 transitions. [2021-11-12 23:07:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 23:07:12,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:12,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:12,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:07:12,730 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:12,730 INFO L85 PathProgramCache]: Analyzing trace with hash 351287827, now seen corresponding path program 1 times [2021-11-12 23:07:12,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:12,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281149352] [2021-11-12 23:07:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:12,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:12,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:12,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281149352] [2021-11-12 23:07:12,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281149352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:12,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:12,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:12,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230205954] [2021-11-12 23:07:12,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:12,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:12,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:12,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:12,919 INFO L87 Difference]: Start difference. First operand 273 states and 416 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:13,397 INFO L93 Difference]: Finished difference Result 279 states and 419 transitions. [2021-11-12 23:07:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:13,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-12 23:07:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:13,400 INFO L225 Difference]: With dead ends: 279 [2021-11-12 23:07:13,401 INFO L226 Difference]: Without dead ends: 275 [2021-11-12 23:07:13,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:13,402 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 263 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 358.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.37ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 429.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:13,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 268 Invalid, 280 Unknown, 0 Unchecked, 4.37ms Time], IncrementalHoareTripleChecker [29 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 429.86ms Time] [2021-11-12 23:07:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-12 23:07:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 271. [2021-11-12 23:07:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 186 states have (on average 1.7580645161290323) internal successors, (327), 268 states have internal predecessors, (327), 83 states have call successors, (83), 2 states have call predecessors, (83), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 410 transitions. [2021-11-12 23:07:13,430 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 410 transitions. Word has length 16 [2021-11-12 23:07:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:13,431 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 410 transitions. [2021-11-12 23:07:13,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 410 transitions. [2021-11-12 23:07:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-12 23:07:13,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:13,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:13,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:07:13,433 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:13,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1995628315, now seen corresponding path program 1 times [2021-11-12 23:07:13,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:13,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218567591] [2021-11-12 23:07:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:13,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:13,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:13,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218567591] [2021-11-12 23:07:13,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218567591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:13,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:13,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:07:13,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254987568] [2021-11-12 23:07:13,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:13,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:13,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:07:13,543 INFO L87 Difference]: Start difference. First operand 271 states and 410 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:13,628 INFO L93 Difference]: Finished difference Result 273 states and 411 transitions. [2021-11-12 23:07:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:13,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-12 23:07:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:13,631 INFO L225 Difference]: With dead ends: 273 [2021-11-12 23:07:13,631 INFO L226 Difference]: Without dead ends: 269 [2021-11-12 23:07:13,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:07:13,633 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 254 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:13,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 257 Invalid, 12 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 58.28ms Time] [2021-11-12 23:07:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-12 23:07:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-11-12 23:07:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 186 states have (on average 1.7365591397849462) internal successors, (323), 266 states have internal predecessors, (323), 81 states have call successors, (81), 2 states have call predecessors, (81), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 404 transitions. [2021-11-12 23:07:13,660 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 404 transitions. Word has length 17 [2021-11-12 23:07:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:13,661 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 404 transitions. [2021-11-12 23:07:13,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 404 transitions. [2021-11-12 23:07:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-12 23:07:13,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:13,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:13,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 23:07:13,663 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1735577896, now seen corresponding path program 1 times [2021-11-12 23:07:13,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:13,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363049864] [2021-11-12 23:07:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:13,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:13,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:13,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363049864] [2021-11-12 23:07:13,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363049864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:13,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:13,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:13,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872979945] [2021-11-12 23:07:13,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:13,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:13,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:13,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:13,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:13,824 INFO L87 Difference]: Start difference. First operand 269 states and 404 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:14,334 INFO L93 Difference]: Finished difference Result 271 states and 405 transitions. [2021-11-12 23:07:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-12 23:07:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:14,337 INFO L225 Difference]: With dead ends: 271 [2021-11-12 23:07:14,337 INFO L226 Difference]: Without dead ends: 268 [2021-11-12 23:07:14,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:14,338 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 253 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 385.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.82ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 458.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:14,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 257 Invalid, 276 Unknown, 0 Unchecked, 4.82ms Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 458.53ms Time] [2021-11-12 23:07:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-12 23:07:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2021-11-12 23:07:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 186 states have (on average 1.7258064516129032) internal successors, (321), 265 states have internal predecessors, (321), 80 states have call successors, (80), 2 states have call predecessors, (80), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 401 transitions. [2021-11-12 23:07:14,367 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 401 transitions. Word has length 18 [2021-11-12 23:07:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:14,368 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 401 transitions. [2021-11-12 23:07:14,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 401 transitions. [2021-11-12 23:07:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 23:07:14,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:14,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:14,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 23:07:14,370 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2031024586, now seen corresponding path program 1 times [2021-11-12 23:07:14,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:14,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711467742] [2021-11-12 23:07:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:14,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:14,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:14,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711467742] [2021-11-12 23:07:14,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711467742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:14,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:14,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:14,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058931385] [2021-11-12 23:07:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:14,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:14,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:14,571 INFO L87 Difference]: Start difference. First operand 268 states and 401 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:15,103 INFO L93 Difference]: Finished difference Result 270 states and 402 transitions. [2021-11-12 23:07:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:15,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-12 23:07:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:15,107 INFO L225 Difference]: With dead ends: 270 [2021-11-12 23:07:15,107 INFO L226 Difference]: Without dead ends: 267 [2021-11-12 23:07:15,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:15,109 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 250 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 373.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.37ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 447.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:15,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 256 Invalid, 273 Unknown, 0 Unchecked, 4.37ms Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 447.56ms Time] [2021-11-12 23:07:15,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-12 23:07:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2021-11-12 23:07:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 186 states have (on average 1.7150537634408602) internal successors, (319), 264 states have internal predecessors, (319), 79 states have call successors, (79), 2 states have call predecessors, (79), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 398 transitions. [2021-11-12 23:07:15,139 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 398 transitions. Word has length 19 [2021-11-12 23:07:15,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:15,140 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 398 transitions. [2021-11-12 23:07:15,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:15,140 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 398 transitions. [2021-11-12 23:07:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 23:07:15,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:15,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:15,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 23:07:15,144 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:15,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1879363247, now seen corresponding path program 1 times [2021-11-12 23:07:15,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:15,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715207312] [2021-11-12 23:07:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:15,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:15,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:15,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715207312] [2021-11-12 23:07:15,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715207312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:15,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:15,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:15,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564679580] [2021-11-12 23:07:15,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:15,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:15,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:15,414 INFO L87 Difference]: Start difference. First operand 267 states and 398 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:15,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:15,979 INFO L93 Difference]: Finished difference Result 364 states and 511 transitions. [2021-11-12 23:07:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:15,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-12 23:07:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:15,983 INFO L225 Difference]: With dead ends: 364 [2021-11-12 23:07:15,983 INFO L226 Difference]: Without dead ends: 358 [2021-11-12 23:07:15,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:15,987 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 235 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 403.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.11ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 487.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:15,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 451 Invalid, 318 Unknown, 0 Unchecked, 7.11ms Time], IncrementalHoareTripleChecker [13 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 487.59ms Time] [2021-11-12 23:07:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-12 23:07:16,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 267. [2021-11-12 23:07:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 186 states have (on average 1.7043010752688172) internal successors, (317), 264 states have internal predecessors, (317), 79 states have call successors, (79), 2 states have call predecessors, (79), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 396 transitions. [2021-11-12 23:07:16,024 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 396 transitions. Word has length 21 [2021-11-12 23:07:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:16,025 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 396 transitions. [2021-11-12 23:07:16,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 396 transitions. [2021-11-12 23:07:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 23:07:16,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:16,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:16,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 23:07:16,029 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1869896606, now seen corresponding path program 1 times [2021-11-12 23:07:16,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:16,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012625857] [2021-11-12 23:07:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:16,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:16,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:16,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012625857] [2021-11-12 23:07:16,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012625857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:16,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:16,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:16,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769289916] [2021-11-12 23:07:16,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:16,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:16,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:16,296 INFO L87 Difference]: Start difference. First operand 267 states and 396 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:17,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:17,106 INFO L93 Difference]: Finished difference Result 320 states and 465 transitions. [2021-11-12 23:07:17,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:17,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 23:07:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:17,110 INFO L225 Difference]: With dead ends: 320 [2021-11-12 23:07:17,110 INFO L226 Difference]: Without dead ends: 296 [2021-11-12 23:07:17,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:17,112 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 199 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 615.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.08ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 739.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:17,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 136 Invalid, 574 Unknown, 0 Unchecked, 6.08ms Time], IncrementalHoareTripleChecker [78 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 739.46ms Time] [2021-11-12 23:07:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-12 23:07:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 286. [2021-11-12 23:07:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 205 states have (on average 1.6243902439024391) internal successors, (333), 283 states have internal predecessors, (333), 79 states have call successors, (79), 2 states have call predecessors, (79), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 412 transitions. [2021-11-12 23:07:17,146 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 412 transitions. Word has length 22 [2021-11-12 23:07:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:17,146 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 412 transitions. [2021-11-12 23:07:17,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 412 transitions. [2021-11-12 23:07:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 23:07:17,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:17,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:17,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 23:07:17,148 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:17,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2132828268, now seen corresponding path program 1 times [2021-11-12 23:07:17,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:17,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108686759] [2021-11-12 23:07:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:17,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:17,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:17,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108686759] [2021-11-12 23:07:17,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108686759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:17,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:17,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:17,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499718146] [2021-11-12 23:07:17,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:17,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:17,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:17,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:17,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:17,326 INFO L87 Difference]: Start difference. First operand 286 states and 412 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:17,792 INFO L93 Difference]: Finished difference Result 292 states and 415 transitions. [2021-11-12 23:07:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-12 23:07:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:17,795 INFO L225 Difference]: With dead ends: 292 [2021-11-12 23:07:17,796 INFO L226 Difference]: Without dead ends: 289 [2021-11-12 23:07:17,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:17,797 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 233 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 339.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.74ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 407.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:17,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 257 Invalid, 257 Unknown, 0 Unchecked, 4.74ms Time], IncrementalHoareTripleChecker [15 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 407.93ms Time] [2021-11-12 23:07:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-12 23:07:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 285. [2021-11-12 23:07:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 205 states have (on average 1.6146341463414635) internal successors, (331), 282 states have internal predecessors, (331), 78 states have call successors, (78), 2 states have call predecessors, (78), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 409 transitions. [2021-11-12 23:07:17,833 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 409 transitions. Word has length 23 [2021-11-12 23:07:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:17,834 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 409 transitions. [2021-11-12 23:07:17,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 409 transitions. [2021-11-12 23:07:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-12 23:07:17,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:17,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:17,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-12 23:07:17,840 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:17,841 INFO L85 PathProgramCache]: Analyzing trace with hash -967807879, now seen corresponding path program 1 times [2021-11-12 23:07:17,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:17,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513932582] [2021-11-12 23:07:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:17,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:18,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:18,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513932582] [2021-11-12 23:07:18,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513932582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:18,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:18,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:18,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761793596] [2021-11-12 23:07:18,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:18,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:18,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:18,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:18,005 INFO L87 Difference]: Start difference. First operand 285 states and 409 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:18,468 INFO L93 Difference]: Finished difference Result 287 states and 410 transitions. [2021-11-12 23:07:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:18,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-12 23:07:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:18,471 INFO L225 Difference]: With dead ends: 287 [2021-11-12 23:07:18,472 INFO L226 Difference]: Without dead ends: 284 [2021-11-12 23:07:18,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:18,473 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 240 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 349.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.36ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 418.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:18,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 254 Invalid, 267 Unknown, 0 Unchecked, 3.36ms Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 418.36ms Time] [2021-11-12 23:07:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-12 23:07:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2021-11-12 23:07:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 205 states have (on average 1.604878048780488) internal successors, (329), 281 states have internal predecessors, (329), 77 states have call successors, (77), 2 states have call predecessors, (77), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 406 transitions. [2021-11-12 23:07:18,504 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 406 transitions. Word has length 25 [2021-11-12 23:07:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:18,505 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 406 transitions. [2021-11-12 23:07:18,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 406 transitions. [2021-11-12 23:07:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 23:07:18,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:18,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 23:07:18,507 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash 62138860, now seen corresponding path program 1 times [2021-11-12 23:07:18,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:18,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141572067] [2021-11-12 23:07:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:18,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:18,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:18,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141572067] [2021-11-12 23:07:18,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141572067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:18,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:18,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:18,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220736732] [2021-11-12 23:07:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:18,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:18,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:18,709 INFO L87 Difference]: Start difference. First operand 284 states and 406 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:19,307 INFO L93 Difference]: Finished difference Result 286 states and 407 transitions. [2021-11-12 23:07:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:19,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-12 23:07:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:19,310 INFO L225 Difference]: With dead ends: 286 [2021-11-12 23:07:19,310 INFO L226 Difference]: Without dead ends: 281 [2021-11-12 23:07:19,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:19,311 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 233 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 456.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.41ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 544.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:19,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 80 Invalid, 431 Unknown, 0 Unchecked, 4.41ms Time], IncrementalHoareTripleChecker [4 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 544.05ms Time] [2021-11-12 23:07:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-12 23:07:19,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-11-12 23:07:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 205 states have (on average 1.575609756097561) internal successors, (323), 278 states have internal predecessors, (323), 74 states have call successors, (74), 2 states have call predecessors, (74), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 397 transitions. [2021-11-12 23:07:19,391 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 397 transitions. Word has length 26 [2021-11-12 23:07:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:19,391 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 397 transitions. [2021-11-12 23:07:19,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 397 transitions. [2021-11-12 23:07:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 23:07:19,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:19,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:19,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 23:07:19,393 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1925723486, now seen corresponding path program 1 times [2021-11-12 23:07:19,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:19,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873065592] [2021-11-12 23:07:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:19,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:19,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:19,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873065592] [2021-11-12 23:07:19,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873065592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:19,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:19,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:19,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665417567] [2021-11-12 23:07:19,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:19,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:19,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:19,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:19,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:19,607 INFO L87 Difference]: Start difference. First operand 281 states and 397 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:20,165 INFO L93 Difference]: Finished difference Result 283 states and 398 transitions. [2021-11-12 23:07:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-12 23:07:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:20,168 INFO L225 Difference]: With dead ends: 283 [2021-11-12 23:07:20,169 INFO L226 Difference]: Without dead ends: 280 [2021-11-12 23:07:20,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:20,171 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 230 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 412.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.80ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 494.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:20,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 220 Invalid, 285 Unknown, 0 Unchecked, 3.80ms Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 494.84ms Time] [2021-11-12 23:07:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-12 23:07:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2021-11-12 23:07:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 205 states have (on average 1.5658536585365854) internal successors, (321), 277 states have internal predecessors, (321), 73 states have call successors, (73), 2 states have call predecessors, (73), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 394 transitions. [2021-11-12 23:07:20,223 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 394 transitions. Word has length 27 [2021-11-12 23:07:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:20,225 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 394 transitions. [2021-11-12 23:07:20,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 394 transitions. [2021-11-12 23:07:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 23:07:20,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:20,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:20,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-12 23:07:20,229 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:20,230 INFO L85 PathProgramCache]: Analyzing trace with hash -432688463, now seen corresponding path program 1 times [2021-11-12 23:07:20,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:20,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759868649] [2021-11-12 23:07:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:20,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:20,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:20,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759868649] [2021-11-12 23:07:20,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759868649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:20,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:20,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:20,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958832797] [2021-11-12 23:07:20,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:20,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:20,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:20,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:20,475 INFO L87 Difference]: Start difference. First operand 280 states and 394 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:21,273 INFO L93 Difference]: Finished difference Result 299 states and 413 transitions. [2021-11-12 23:07:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-12 23:07:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:21,277 INFO L225 Difference]: With dead ends: 299 [2021-11-12 23:07:21,277 INFO L226 Difference]: Without dead ends: 296 [2021-11-12 23:07:21,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:21,278 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 198 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 613.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.26ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 730.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:21,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 122 Invalid, 569 Unknown, 0 Unchecked, 4.26ms Time], IncrementalHoareTripleChecker [65 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 730.91ms Time] [2021-11-12 23:07:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-12 23:07:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 280. [2021-11-12 23:07:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 205 states have (on average 1.5609756097560976) internal successors, (320), 277 states have internal predecessors, (320), 73 states have call successors, (73), 2 states have call predecessors, (73), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 393 transitions. [2021-11-12 23:07:21,318 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 393 transitions. Word has length 28 [2021-11-12 23:07:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:21,319 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 393 transitions. [2021-11-12 23:07:21,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 393 transitions. [2021-11-12 23:07:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-12 23:07:21,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:21,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:21,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-12 23:07:21,321 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:21,322 INFO L85 PathProgramCache]: Analyzing trace with hash -529008058, now seen corresponding path program 1 times [2021-11-12 23:07:21,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:21,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700294068] [2021-11-12 23:07:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:21,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:21,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:21,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700294068] [2021-11-12 23:07:21,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700294068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:21,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:21,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:21,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068706564] [2021-11-12 23:07:21,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:21,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:21,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:21,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:21,545 INFO L87 Difference]: Start difference. First operand 280 states and 393 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:22,402 INFO L93 Difference]: Finished difference Result 296 states and 408 transitions. [2021-11-12 23:07:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:22,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-12 23:07:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:22,409 INFO L225 Difference]: With dead ends: 296 [2021-11-12 23:07:22,409 INFO L226 Difference]: Without dead ends: 290 [2021-11-12 23:07:22,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:22,410 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 196 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 672.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.10ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 793.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:22,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 114 Invalid, 567 Unknown, 0 Unchecked, 4.10ms Time], IncrementalHoareTripleChecker [73 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 793.34ms Time] [2021-11-12 23:07:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-12 23:07:22,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 280. [2021-11-12 23:07:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 205 states have (on average 1.551219512195122) internal successors, (318), 277 states have internal predecessors, (318), 73 states have call successors, (73), 2 states have call predecessors, (73), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 391 transitions. [2021-11-12 23:07:22,450 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 391 transitions. Word has length 29 [2021-11-12 23:07:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:22,450 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 391 transitions. [2021-11-12 23:07:22,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 391 transitions. [2021-11-12 23:07:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-12 23:07:22,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:22,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:22,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-12 23:07:22,453 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash 780058486, now seen corresponding path program 1 times [2021-11-12 23:07:22,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:22,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575475910] [2021-11-12 23:07:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:22,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:22,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:22,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575475910] [2021-11-12 23:07:22,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575475910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:22,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:22,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:22,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134156882] [2021-11-12 23:07:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:22,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:22,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:22,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:22,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:22,678 INFO L87 Difference]: Start difference. First operand 280 states and 391 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:23,247 INFO L93 Difference]: Finished difference Result 325 states and 436 transitions. [2021-11-12 23:07:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:23,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-12 23:07:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:23,250 INFO L225 Difference]: With dead ends: 325 [2021-11-12 23:07:23,251 INFO L226 Difference]: Without dead ends: 322 [2021-11-12 23:07:23,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:23,252 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 166 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 407.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.03ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 487.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:23,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 454 Invalid, 290 Unknown, 0 Unchecked, 5.03ms Time], IncrementalHoareTripleChecker [12 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 487.61ms Time] [2021-11-12 23:07:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-12 23:07:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 280. [2021-11-12 23:07:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 205 states have (on average 1.5463414634146342) internal successors, (317), 277 states have internal predecessors, (317), 73 states have call successors, (73), 2 states have call predecessors, (73), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 390 transitions. [2021-11-12 23:07:23,292 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 390 transitions. Word has length 30 [2021-11-12 23:07:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:23,293 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 390 transitions. [2021-11-12 23:07:23,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:23,293 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 390 transitions. [2021-11-12 23:07:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 23:07:23,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:23,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:23,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-12 23:07:23,295 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1588544728, now seen corresponding path program 1 times [2021-11-12 23:07:23,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:23,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149639677] [2021-11-12 23:07:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:23,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:23,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:23,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149639677] [2021-11-12 23:07:23,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149639677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:23,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:23,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:23,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686918537] [2021-11-12 23:07:23,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:23,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:23,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:23,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:23,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:23,478 INFO L87 Difference]: Start difference. First operand 280 states and 390 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:24,297 INFO L93 Difference]: Finished difference Result 325 states and 435 transitions. [2021-11-12 23:07:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-12 23:07:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:24,300 INFO L225 Difference]: With dead ends: 325 [2021-11-12 23:07:24,301 INFO L226 Difference]: Without dead ends: 322 [2021-11-12 23:07:24,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:24,302 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 185 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 594.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.44ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 737.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:24,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 155 Invalid, 550 Unknown, 0 Unchecked, 4.44ms Time], IncrementalHoareTripleChecker [33 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 737.57ms Time] [2021-11-12 23:07:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-12 23:07:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 280. [2021-11-12 23:07:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 205 states have (on average 1.5414634146341464) internal successors, (316), 277 states have internal predecessors, (316), 73 states have call successors, (73), 2 states have call predecessors, (73), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 389 transitions. [2021-11-12 23:07:24,342 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 389 transitions. Word has length 31 [2021-11-12 23:07:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:24,342 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 389 transitions. [2021-11-12 23:07:24,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 389 transitions. [2021-11-12 23:07:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 23:07:24,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:24,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:24,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-12 23:07:24,344 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:24,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:24,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2000793541, now seen corresponding path program 1 times [2021-11-12 23:07:24,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:24,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524647789] [2021-11-12 23:07:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:24,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:24,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:24,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524647789] [2021-11-12 23:07:24,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524647789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:24,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:24,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:24,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011418668] [2021-11-12 23:07:24,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:24,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:24,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:24,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:24,472 INFO L87 Difference]: Start difference. First operand 280 states and 389 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:24,992 INFO L93 Difference]: Finished difference Result 286 states and 392 transitions. [2021-11-12 23:07:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:24,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 23:07:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:24,995 INFO L225 Difference]: With dead ends: 286 [2021-11-12 23:07:24,995 INFO L226 Difference]: Without dead ends: 282 [2021-11-12 23:07:24,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:24,996 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 220 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 401.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 465.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:24,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 227 Invalid, 270 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [6 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 465.52ms Time] [2021-11-12 23:07:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-12 23:07:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 278. [2021-11-12 23:07:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 205 states have (on average 1.5219512195121951) internal successors, (312), 275 states have internal predecessors, (312), 71 states have call successors, (71), 2 states have call predecessors, (71), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 383 transitions. [2021-11-12 23:07:25,032 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 383 transitions. Word has length 32 [2021-11-12 23:07:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:25,033 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 383 transitions. [2021-11-12 23:07:25,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 383 transitions. [2021-11-12 23:07:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 23:07:25,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:25,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:25,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-12 23:07:25,035 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:25,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:25,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2061697595, now seen corresponding path program 1 times [2021-11-12 23:07:25,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:25,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915482463] [2021-11-12 23:07:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:25,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:25,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:25,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915482463] [2021-11-12 23:07:25,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915482463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:25,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:25,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:25,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453265281] [2021-11-12 23:07:25,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:25,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:25,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:25,163 INFO L87 Difference]: Start difference. First operand 278 states and 383 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:25,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:25,642 INFO L93 Difference]: Finished difference Result 284 states and 386 transitions. [2021-11-12 23:07:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:25,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-12 23:07:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:25,645 INFO L225 Difference]: With dead ends: 284 [2021-11-12 23:07:25,646 INFO L226 Difference]: Without dead ends: 279 [2021-11-12 23:07:25,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:25,648 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 210 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 346.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.01ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 421.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:25,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 224 Invalid, 262 Unknown, 0 Unchecked, 3.01ms Time], IncrementalHoareTripleChecker [7 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 421.37ms Time] [2021-11-12 23:07:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-12 23:07:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2021-11-12 23:07:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 205 states have (on average 1.4926829268292683) internal successors, (306), 272 states have internal predecessors, (306), 68 states have call successors, (68), 2 states have call predecessors, (68), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 374 transitions. [2021-11-12 23:07:25,692 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 374 transitions. Word has length 36 [2021-11-12 23:07:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:25,693 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 374 transitions. [2021-11-12 23:07:25,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 374 transitions. [2021-11-12 23:07:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-12 23:07:25,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:25,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:25,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-12 23:07:25,695 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:25,695 INFO L85 PathProgramCache]: Analyzing trace with hash 511370714, now seen corresponding path program 1 times [2021-11-12 23:07:25,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:25,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021918675] [2021-11-12 23:07:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:25,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:25,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:25,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021918675] [2021-11-12 23:07:25,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021918675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:25,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:25,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:25,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928875868] [2021-11-12 23:07:25,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:25,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:25,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:25,873 INFO L87 Difference]: Start difference. First operand 275 states and 374 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:26,331 INFO L93 Difference]: Finished difference Result 320 states and 418 transitions. [2021-11-12 23:07:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-12 23:07:26,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:26,334 INFO L225 Difference]: With dead ends: 320 [2021-11-12 23:07:26,334 INFO L226 Difference]: Without dead ends: 313 [2021-11-12 23:07:26,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:26,335 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 145 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 328.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.01ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 391.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:26,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 411 Invalid, 246 Unknown, 0 Unchecked, 3.01ms Time], IncrementalHoareTripleChecker [13 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 391.85ms Time] [2021-11-12 23:07:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-12 23:07:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 275. [2021-11-12 23:07:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 205 states have (on average 1.4780487804878049) internal successors, (303), 272 states have internal predecessors, (303), 68 states have call successors, (68), 2 states have call predecessors, (68), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 371 transitions. [2021-11-12 23:07:26,370 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 371 transitions. Word has length 37 [2021-11-12 23:07:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:26,371 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 371 transitions. [2021-11-12 23:07:26,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 371 transitions. [2021-11-12 23:07:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-12 23:07:26,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:26,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:26,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-12 23:07:26,373 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:26,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1327883638, now seen corresponding path program 1 times [2021-11-12 23:07:26,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:26,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740861566] [2021-11-12 23:07:26,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:26,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:26,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:26,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740861566] [2021-11-12 23:07:26,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740861566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:26,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:26,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:26,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669487599] [2021-11-12 23:07:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:26,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:26,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:26,541 INFO L87 Difference]: Start difference. First operand 275 states and 371 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:27,102 INFO L93 Difference]: Finished difference Result 281 states and 374 transitions. [2021-11-12 23:07:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:27,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-12 23:07:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:27,105 INFO L225 Difference]: With dead ends: 281 [2021-11-12 23:07:27,106 INFO L226 Difference]: Without dead ends: 278 [2021-11-12 23:07:27,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:27,108 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 206 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 412.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 510.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:27,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 74 Invalid, 405 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [5 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 510.52ms Time] [2021-11-12 23:07:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-12 23:07:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2021-11-12 23:07:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 205 states have (on average 1.4682926829268292) internal successors, (301), 271 states have internal predecessors, (301), 67 states have call successors, (67), 2 states have call predecessors, (67), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 368 transitions. [2021-11-12 23:07:27,145 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 368 transitions. Word has length 38 [2021-11-12 23:07:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:27,145 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 368 transitions. [2021-11-12 23:07:27,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 368 transitions. [2021-11-12 23:07:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 23:07:27,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:27,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:27,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-12 23:07:27,147 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:27,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1784780476, now seen corresponding path program 1 times [2021-11-12 23:07:27,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:27,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482702742] [2021-11-12 23:07:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:27,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:27,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:27,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482702742] [2021-11-12 23:07:27,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482702742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:27,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:27,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:27,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688618480] [2021-11-12 23:07:27,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:27,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:27,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:27,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:27,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:27,329 INFO L87 Difference]: Start difference. First operand 274 states and 368 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:28,018 INFO L93 Difference]: Finished difference Result 287 states and 381 transitions. [2021-11-12 23:07:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-12 23:07:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:28,021 INFO L225 Difference]: With dead ends: 287 [2021-11-12 23:07:28,021 INFO L226 Difference]: Without dead ends: 284 [2021-11-12 23:07:28,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:28,022 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 162 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 524.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 627.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:28,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 120 Invalid, 524 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [60 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 627.21ms Time] [2021-11-12 23:07:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-12 23:07:28,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 274. [2021-11-12 23:07:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 205 states have (on average 1.4634146341463414) internal successors, (300), 271 states have internal predecessors, (300), 67 states have call successors, (67), 2 states have call predecessors, (67), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 367 transitions. [2021-11-12 23:07:28,066 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 367 transitions. Word has length 39 [2021-11-12 23:07:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:28,067 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 367 transitions. [2021-11-12 23:07:28,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 367 transitions. [2021-11-12 23:07:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 23:07:28,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:28,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:28,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-12 23:07:28,069 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1466319777, now seen corresponding path program 1 times [2021-11-12 23:07:28,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:28,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127742478] [2021-11-12 23:07:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:28,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:28,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:28,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127742478] [2021-11-12 23:07:28,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127742478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:28,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:28,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:28,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466218750] [2021-11-12 23:07:28,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:28,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:28,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:28,324 INFO L87 Difference]: Start difference. First operand 274 states and 367 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:28,923 INFO L93 Difference]: Finished difference Result 276 states and 368 transitions. [2021-11-12 23:07:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:28,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-12 23:07:28,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:28,926 INFO L225 Difference]: With dead ends: 276 [2021-11-12 23:07:28,926 INFO L226 Difference]: Without dead ends: 271 [2021-11-12 23:07:28,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:28,927 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 198 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 460.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.69ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 542.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:28,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 70 Invalid, 401 Unknown, 0 Unchecked, 2.69ms Time], IncrementalHoareTripleChecker [4 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 542.69ms Time] [2021-11-12 23:07:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-12 23:07:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2021-11-12 23:07:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 205 states have (on average 1.4341463414634146) internal successors, (294), 268 states have internal predecessors, (294), 64 states have call successors, (64), 2 states have call predecessors, (64), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 358 transitions. [2021-11-12 23:07:28,966 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 358 transitions. Word has length 41 [2021-11-12 23:07:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:28,967 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 358 transitions. [2021-11-12 23:07:28,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 358 transitions. [2021-11-12 23:07:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-12 23:07:28,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:28,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:28,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-12 23:07:28,969 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:28,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash 368700550, now seen corresponding path program 1 times [2021-11-12 23:07:28,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:28,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879002969] [2021-11-12 23:07:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:28,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:29,186 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:29,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879002969] [2021-11-12 23:07:29,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879002969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:29,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:29,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:07:29,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552518725] [2021-11-12 23:07:29,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:29,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:07:29,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:07:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:07:29,189 INFO L87 Difference]: Start difference. First operand 271 states and 358 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:29,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:29,726 INFO L93 Difference]: Finished difference Result 273 states and 359 transitions. [2021-11-12 23:07:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:29,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-12 23:07:29,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:29,729 INFO L225 Difference]: With dead ends: 273 [2021-11-12 23:07:29,730 INFO L226 Difference]: Without dead ends: 269 [2021-11-12 23:07:29,730 INFO L932 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 [2021-11-12 23:07:29,731 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 359 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 410.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.04ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 480.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:29,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 201 Invalid, 326 Unknown, 0 Unchecked, 3.04ms Time], IncrementalHoareTripleChecker [68 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 480.24ms Time] [2021-11-12 23:07:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-12 23:07:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-11-12 23:07:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 205 states have (on average 1.4146341463414633) internal successors, (290), 266 states have internal predecessors, (290), 62 states have call successors, (62), 2 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 352 transitions. [2021-11-12 23:07:29,777 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 352 transitions. Word has length 43 [2021-11-12 23:07:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:29,778 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 352 transitions. [2021-11-12 23:07:29,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 352 transitions. [2021-11-12 23:07:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:07:29,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:29,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:29,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-12 23:07:29,780 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:29,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1455650596, now seen corresponding path program 1 times [2021-11-12 23:07:29,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:29,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015583522] [2021-11-12 23:07:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:29,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:29,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:29,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015583522] [2021-11-12 23:07:29,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015583522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:29,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:29,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:29,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332257715] [2021-11-12 23:07:29,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:29,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:29,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:29,997 INFO L87 Difference]: Start difference. First operand 269 states and 352 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:30,639 INFO L93 Difference]: Finished difference Result 287 states and 370 transitions. [2021-11-12 23:07:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:30,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-12 23:07:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:30,643 INFO L225 Difference]: With dead ends: 287 [2021-11-12 23:07:30,643 INFO L226 Difference]: Without dead ends: 284 [2021-11-12 23:07:30,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:30,644 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 150 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 477.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.18ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 577.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:30,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 121 Invalid, 515 Unknown, 0 Unchecked, 3.18ms Time], IncrementalHoareTripleChecker [54 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 577.36ms Time] [2021-11-12 23:07:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-12 23:07:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 269. [2021-11-12 23:07:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 205 states have (on average 1.4097560975609755) internal successors, (289), 266 states have internal predecessors, (289), 62 states have call successors, (62), 2 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 351 transitions. [2021-11-12 23:07:30,697 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 351 transitions. Word has length 44 [2021-11-12 23:07:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:30,698 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 351 transitions. [2021-11-12 23:07:30,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 351 transitions. [2021-11-12 23:07:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 23:07:30,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:30,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:30,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-12 23:07:30,700 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1264432542, now seen corresponding path program 1 times [2021-11-12 23:07:30,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:30,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550677725] [2021-11-12 23:07:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:30,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:30,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:30,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550677725] [2021-11-12 23:07:30,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550677725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:30,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:30,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:30,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373498658] [2021-11-12 23:07:30,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:30,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:30,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:30,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:30,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:30,940 INFO L87 Difference]: Start difference. First operand 269 states and 351 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:31,611 INFO L93 Difference]: Finished difference Result 294 states and 375 transitions. [2021-11-12 23:07:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:31,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-12 23:07:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:31,614 INFO L225 Difference]: With dead ends: 294 [2021-11-12 23:07:31,614 INFO L226 Difference]: Without dead ends: 279 [2021-11-12 23:07:31,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:31,615 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 129 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 513.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 611.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:31,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 131 Invalid, 494 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [61 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 611.22ms Time] [2021-11-12 23:07:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-12 23:07:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 272. [2021-11-12 23:07:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.3653846153846154) internal successors, (284), 269 states have internal predecessors, (284), 62 states have call successors, (62), 2 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 346 transitions. [2021-11-12 23:07:31,654 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 346 transitions. Word has length 46 [2021-11-12 23:07:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:31,654 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 346 transitions. [2021-11-12 23:07:31,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 346 transitions. [2021-11-12 23:07:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 23:07:31,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:31,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:31,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-12 23:07:31,656 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1207068698, now seen corresponding path program 1 times [2021-11-12 23:07:31,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:31,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972100825] [2021-11-12 23:07:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:31,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:31,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:31,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972100825] [2021-11-12 23:07:31,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972100825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:31,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:31,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:31,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599028607] [2021-11-12 23:07:31,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:31,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:31,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:31,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:31,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:31,871 INFO L87 Difference]: Start difference. First operand 272 states and 346 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:32,466 INFO L93 Difference]: Finished difference Result 285 states and 356 transitions. [2021-11-12 23:07:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:32,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-12 23:07:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:32,469 INFO L225 Difference]: With dead ends: 285 [2021-11-12 23:07:32,469 INFO L226 Difference]: Without dead ends: 282 [2021-11-12 23:07:32,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:32,470 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 130 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 460.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.55ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 543.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:32,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 133 Invalid, 502 Unknown, 0 Unchecked, 2.55ms Time], IncrementalHoareTripleChecker [55 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 543.25ms Time] [2021-11-12 23:07:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-12 23:07:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 272. [2021-11-12 23:07:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.3605769230769231) internal successors, (283), 269 states have internal predecessors, (283), 62 states have call successors, (62), 2 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 345 transitions. [2021-11-12 23:07:32,501 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 345 transitions. Word has length 51 [2021-11-12 23:07:32,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:32,501 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 345 transitions. [2021-11-12 23:07:32,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:32,501 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 345 transitions. [2021-11-12 23:07:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 23:07:32,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:32,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:32,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-12 23:07:32,506 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:32,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1451064462, now seen corresponding path program 1 times [2021-11-12 23:07:32,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:32,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278362095] [2021-11-12 23:07:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:32,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:32,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:32,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278362095] [2021-11-12 23:07:32,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278362095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:32,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:32,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:32,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830738433] [2021-11-12 23:07:32,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:32,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:32,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:32,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:32,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:32,657 INFO L87 Difference]: Start difference. First operand 272 states and 345 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:32,960 INFO L93 Difference]: Finished difference Result 296 states and 365 transitions. [2021-11-12 23:07:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:32,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-12 23:07:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:32,963 INFO L225 Difference]: With dead ends: 296 [2021-11-12 23:07:32,963 INFO L226 Difference]: Without dead ends: 289 [2021-11-12 23:07:32,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:32,964 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 74 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 258.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:32,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 396 Invalid, 198 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 258.37ms Time] [2021-11-12 23:07:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-12 23:07:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 272. [2021-11-12 23:07:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.3461538461538463) internal successors, (280), 269 states have internal predecessors, (280), 62 states have call successors, (62), 2 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 342 transitions. [2021-11-12 23:07:32,997 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 342 transitions. Word has length 64 [2021-11-12 23:07:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:32,998 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 342 transitions. [2021-11-12 23:07:32,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 342 transitions. [2021-11-12 23:07:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 23:07:33,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:33,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:33,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-12 23:07:33,005 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1401761456, now seen corresponding path program 1 times [2021-11-12 23:07:33,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:33,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064662587] [2021-11-12 23:07:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:33,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:33,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:33,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064662587] [2021-11-12 23:07:33,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064662587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:33,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:33,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:33,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28295021] [2021-11-12 23:07:33,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:33,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:33,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:33,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:33,128 INFO L87 Difference]: Start difference. First operand 272 states and 342 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:33,494 INFO L93 Difference]: Finished difference Result 274 states and 343 transitions. [2021-11-12 23:07:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:33,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-12 23:07:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:33,497 INFO L225 Difference]: With dead ends: 274 [2021-11-12 23:07:33,497 INFO L226 Difference]: Without dead ends: 269 [2021-11-12 23:07:33,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:33,498 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 163 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 324.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:33,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 219 Invalid, 232 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [4 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 324.88ms Time] [2021-11-12 23:07:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-12 23:07:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-11-12 23:07:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 208 states have (on average 1.3221153846153846) internal successors, (275), 266 states have internal predecessors, (275), 59 states have call successors, (59), 2 states have call predecessors, (59), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 334 transitions. [2021-11-12 23:07:33,529 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 334 transitions. Word has length 66 [2021-11-12 23:07:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:33,530 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 334 transitions. [2021-11-12 23:07:33,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 334 transitions. [2021-11-12 23:07:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:07:33,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:33,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:33,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-12 23:07:33,532 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -505241790, now seen corresponding path program 1 times [2021-11-12 23:07:33,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:33,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191569879] [2021-11-12 23:07:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:33,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:33,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:33,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191569879] [2021-11-12 23:07:33,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191569879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:33,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:33,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:33,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592380893] [2021-11-12 23:07:33,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:33,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:33,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:33,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:33,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:33,642 INFO L87 Difference]: Start difference. First operand 269 states and 334 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:33,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:33,983 INFO L93 Difference]: Finished difference Result 273 states and 336 transitions. [2021-11-12 23:07:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:33,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-12 23:07:33,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:33,985 INFO L225 Difference]: With dead ends: 273 [2021-11-12 23:07:33,985 INFO L226 Difference]: Without dead ends: 270 [2021-11-12 23:07:33,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:33,986 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 161 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 251.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 298.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:33,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 218 Invalid, 228 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [4 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 298.39ms Time] [2021-11-12 23:07:33,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-12 23:07:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 268. [2021-11-12 23:07:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 208 states have (on average 1.3125) internal successors, (273), 265 states have internal predecessors, (273), 58 states have call successors, (58), 2 states have call predecessors, (58), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 331 transitions. [2021-11-12 23:07:34,015 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 331 transitions. Word has length 67 [2021-11-12 23:07:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:34,016 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 331 transitions. [2021-11-12 23:07:34,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 331 transitions. [2021-11-12 23:07:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:07:34,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:34,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:34,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-12 23:07:34,017 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:34,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1901725405, now seen corresponding path program 1 times [2021-11-12 23:07:34,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:34,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995944958] [2021-11-12 23:07:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:34,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:34,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:34,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995944958] [2021-11-12 23:07:34,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995944958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:34,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:34,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:34,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587435045] [2021-11-12 23:07:34,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:34,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:34,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:34,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:34,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:34,236 INFO L87 Difference]: Start difference. First operand 268 states and 331 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:34,751 INFO L93 Difference]: Finished difference Result 278 states and 338 transitions. [2021-11-12 23:07:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:34,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-12 23:07:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:34,753 INFO L225 Difference]: With dead ends: 278 [2021-11-12 23:07:34,754 INFO L226 Difference]: Without dead ends: 275 [2021-11-12 23:07:34,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:34,754 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 83 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 391.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 469.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:34,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 141 Invalid, 444 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [37 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 469.23ms Time] [2021-11-12 23:07:34,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-12 23:07:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2021-11-12 23:07:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 208 states have (on average 1.3076923076923077) internal successors, (272), 265 states have internal predecessors, (272), 58 states have call successors, (58), 2 states have call predecessors, (58), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 330 transitions. [2021-11-12 23:07:34,785 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 330 transitions. Word has length 70 [2021-11-12 23:07:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:34,786 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 330 transitions. [2021-11-12 23:07:34,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 330 transitions. [2021-11-12 23:07:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:07:34,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:34,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:34,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-12 23:07:34,789 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2106988641, now seen corresponding path program 1 times [2021-11-12 23:07:34,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:34,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797781912] [2021-11-12 23:07:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:34,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:34,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:34,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797781912] [2021-11-12 23:07:34,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797781912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:34,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:34,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:07:34,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246058545] [2021-11-12 23:07:34,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:34,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:34,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:34,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:34,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:07:34,869 INFO L87 Difference]: Start difference. First operand 268 states and 330 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:34,937 INFO L93 Difference]: Finished difference Result 270 states and 331 transitions. [2021-11-12 23:07:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:34,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-12 23:07:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:34,940 INFO L225 Difference]: With dead ends: 270 [2021-11-12 23:07:34,940 INFO L226 Difference]: Without dead ends: 267 [2021-11-12 23:07:34,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:07:34,941 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 151 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.54ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:34,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 216 Invalid, 4 Unknown, 0 Unchecked, 0.54ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 38.86ms Time] [2021-11-12 23:07:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-12 23:07:34,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2021-11-12 23:07:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 208 states have (on average 1.2980769230769231) internal successors, (270), 264 states have internal predecessors, (270), 57 states have call successors, (57), 2 states have call predecessors, (57), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 327 transitions. [2021-11-12 23:07:34,970 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 327 transitions. Word has length 72 [2021-11-12 23:07:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:34,971 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 327 transitions. [2021-11-12 23:07:34,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 327 transitions. [2021-11-12 23:07:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:07:34,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:34,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:34,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-12 23:07:34,973 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash -892407311, now seen corresponding path program 1 times [2021-11-12 23:07:34,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:34,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030894853] [2021-11-12 23:07:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:34,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:35,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:35,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030894853] [2021-11-12 23:07:35,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030894853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:35,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:35,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:35,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694905917] [2021-11-12 23:07:35,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:35,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:35,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:35,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:35,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:35,092 INFO L87 Difference]: Start difference. First operand 267 states and 327 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:35,436 INFO L93 Difference]: Finished difference Result 271 states and 329 transitions. [2021-11-12 23:07:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:07:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:35,438 INFO L225 Difference]: With dead ends: 271 [2021-11-12 23:07:35,438 INFO L226 Difference]: Without dead ends: 268 [2021-11-12 23:07:35,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:35,439 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 151 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 257.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:35,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 215 Invalid, 223 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [4 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 304.58ms Time] [2021-11-12 23:07:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-12 23:07:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2021-11-12 23:07:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 208 states have (on average 1.2884615384615385) internal successors, (268), 263 states have internal predecessors, (268), 56 states have call successors, (56), 2 states have call predecessors, (56), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2021-11-12 23:07:35,467 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 73 [2021-11-12 23:07:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:35,467 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2021-11-12 23:07:35,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2021-11-12 23:07:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-12 23:07:35,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:35,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:35,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-12 23:07:35,469 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:35,470 INFO L85 PathProgramCache]: Analyzing trace with hash -841867101, now seen corresponding path program 1 times [2021-11-12 23:07:35,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:35,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107425097] [2021-11-12 23:07:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:35,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:35,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:35,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107425097] [2021-11-12 23:07:35,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107425097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:35,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:35,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:35,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380455116] [2021-11-12 23:07:35,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:35,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:35,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:35,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:35,585 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:35,877 INFO L93 Difference]: Finished difference Result 277 states and 333 transitions. [2021-11-12 23:07:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:35,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-12 23:07:35,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:35,881 INFO L225 Difference]: With dead ends: 277 [2021-11-12 23:07:35,881 INFO L226 Difference]: Without dead ends: 274 [2021-11-12 23:07:35,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:35,882 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 37 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 249.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:35,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 479 Invalid, 174 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 249.51ms Time] [2021-11-12 23:07:35,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-12 23:07:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 266. [2021-11-12 23:07:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 208 states have (on average 1.2836538461538463) internal successors, (267), 263 states have internal predecessors, (267), 56 states have call successors, (56), 2 states have call predecessors, (56), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 323 transitions. [2021-11-12 23:07:35,911 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 323 transitions. Word has length 79 [2021-11-12 23:07:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:35,912 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 323 transitions. [2021-11-12 23:07:35,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 323 transitions. [2021-11-12 23:07:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:07:35,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:35,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:35,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-12 23:07:35,914 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1079023560, now seen corresponding path program 1 times [2021-11-12 23:07:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:35,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027711243] [2021-11-12 23:07:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:35,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:36,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:36,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027711243] [2021-11-12 23:07:36,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027711243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:36,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:36,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:07:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198940606] [2021-11-12 23:07:36,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:36,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:07:36,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:07:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:36,143 INFO L87 Difference]: Start difference. First operand 266 states and 323 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:36,574 INFO L93 Difference]: Finished difference Result 276 states and 331 transitions. [2021-11-12 23:07:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-12 23:07:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:36,576 INFO L225 Difference]: With dead ends: 276 [2021-11-12 23:07:36,577 INFO L226 Difference]: Without dead ends: 271 [2021-11-12 23:07:36,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:07:36,578 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 69 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 394.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:36,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 126 Invalid, 475 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [56 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 394.46ms Time] [2021-11-12 23:07:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-12 23:07:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2021-11-12 23:07:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 208 states have (on average 1.2692307692307692) internal successors, (264), 263 states have internal predecessors, (264), 56 states have call successors, (56), 2 states have call predecessors, (56), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 320 transitions. [2021-11-12 23:07:36,609 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 320 transitions. Word has length 95 [2021-11-12 23:07:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:36,610 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 320 transitions. [2021-11-12 23:07:36,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 320 transitions. [2021-11-12 23:07:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:07:36,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:36,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:36,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-12 23:07:36,612 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1132823590, now seen corresponding path program 1 times [2021-11-12 23:07:36,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:36,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474269390] [2021-11-12 23:07:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:36,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:37,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:37,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474269390] [2021-11-12 23:07:37,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474269390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:37,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165677227] [2021-11-12 23:07:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:37,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:37,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:37,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:37,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aece5a70-b8db-4eef-8f64-1ef95b06e4ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:07:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:38,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-12 23:07:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:40,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:32,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165677227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:14:32,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551242613] [2021-11-12 23:14:32,302 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2021-11-12 23:14:32,304 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:14:32,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:14:32,322 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:14:32,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:14:32,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:32,952 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:32,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:32,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-12 23:14:32,962 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:32,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:32,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:14:32,969 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:32,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:32,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:14:32,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 198 [2021-11-12 23:14:33,011 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|, v_~inputs~0_11], 10=[|v_#valid_9|]} [2021-11-12 23:14:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:33,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:14:33,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:14:33,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:14:33,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:14:33,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:14:33,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 14 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-12 23:14:33,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:14:33,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:14:33,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:14:33,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:14:33,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:33,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:33,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:33,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:14:33,161 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:14:33,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:14:33,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:14:33,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:14:33,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,182 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-11-12 23:14:33,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:14:33,192 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:186 [2021-11-12 23:14:33,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:33,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-11-12 23:14:33,299 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,043 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,059 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,068 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,071 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-11-12 23:14:34,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 234 [2021-11-12 23:14:34,087 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,089 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,090 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,092 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,096 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:14:34,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 234 [2021-11-12 23:14:34,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 777 [2021-11-12 23:14:34,142 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,146 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-11-12 23:14:34,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 252 [2021-11-12 23:14:34,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2688 [2021-11-12 23:14:34,305 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-12 23:14:34,354 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,357 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,357 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:14:34,364 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-11-12 23:14:34,402 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,432 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,457 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,460 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:14:34,479 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 288 [2021-11-12 23:14:34,491 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,492 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 210 [2021-11-12 23:14:34,515 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,519 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,522 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,530 INFO L185 QuantifierPusher]: treesize reduction 13, result has 90.6 percent of original size 126 [2021-11-12 23:14:34,530 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,534 INFO L180 QuantifierPusher]: treesize reduction 13, result has 93.2 percent of original size [2021-11-12 23:14:34,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-12 23:14:34,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 363 [2021-11-12 23:14:34,564 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,571 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,573 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,575 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,582 INFO L185 QuantifierPusher]: treesize reduction 17, result has 87.9 percent of original size 123 [2021-11-12 23:14:34,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 240 [2021-11-12 23:14:34,595 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,598 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 23:14:34,616 INFO L185 QuantifierPusher]: treesize reduction 34, result has 86.8 percent of original size 223 [2021-11-12 23:14:34,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 850 [2021-11-12 23:14:34,657 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,748 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1751 [2021-11-12 23:14:34,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2911 [2021-11-12 23:14:34,889 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,892 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-11-12 23:14:34,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 975 [2021-11-12 23:14:34,920 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:34,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:34,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3138 [2021-11-12 23:14:35,242 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:35,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:35,425 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:35,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:35,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5157 [2021-11-12 23:14:35,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5553 [2021-11-12 23:14:35,825 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:35,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:36,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8248 [2021-11-12 23:14:36,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31381 [2021-11-12 23:14:38,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87072 [2021-11-12 23:14:38,881 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:39,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:42,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174198 [2021-11-12 23:14:42,420 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:43,492 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:45,068 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:14:45,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:03,694 WARN L227 SmtUtils]: Spent 7.16s on a formula simplification that was a NOOP. DAG size: 534 (called from [L 184] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2021-11-12 23:15:03,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1206197 [2021-11-12 23:15:10,791 WARN L227 SmtUtils]: Spent 7.09s on a formula simplification that was a NOOP. DAG size: 539 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:15:17,918 WARN L227 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 532 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:15:26,858 WARN L227 SmtUtils]: Spent 8.93s on a formula simplification. DAG size of input: 525 DAG size of output: 525 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:15:41,283 WARN L227 SmtUtils]: Spent 8.94s on a formula simplification. DAG size of input: 429 DAG size of output: 429 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:16:12,905 WARN L227 SmtUtils]: Spent 29.86s on a formula simplification. DAG size of input: 457 DAG size of output: 457 (called from [L 184] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2021-11-12 23:16:12,907 INFO L185 QuantifierPusher]: treesize reduction 9, result has 100.0 percent of original size 900632 [2021-11-12 23:16:12,911 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:16:48,120 WARN L227 SmtUtils]: Spent 35.21s on a formula simplification. DAG size of input: 479 DAG size of output: 479 (called from [L 179] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2021-11-12 23:16:48,121 INFO L180 QuantifierPusher]: treesize reduction 9, result has 100.0 percent of original size [2021-11-12 23:16:58,677 WARN L227 SmtUtils]: Spent 10.55s on a formula simplification that was a NOOP. DAG size: 479 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:16:59,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50165 [2021-11-12 23:16:59,379 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:16:59,729 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:00,740 INFO L185 QuantifierPusher]: treesize reduction 9, result has 98.7 percent of original size 676 [2021-11-12 23:17:00,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 454 [2021-11-12 23:17:00,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:00,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:01,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:01,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:01,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:01,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:01,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:01,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:01,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:01,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:01,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:02,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:03,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:04,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:05,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:06,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:07,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:08,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:09,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:10,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:10,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:10,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:10,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:10,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:10,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:10,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:10,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:10,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:10,537 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1273 [2021-11-12 23:17:10,657 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,049 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,068 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,072 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,074 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,079 INFO L185 QuantifierPusher]: treesize reduction 13, result has 90.6 percent of original size 126 [2021-11-12 23:17:11,093 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-11-12 23:17:11,094 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,095 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,096 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-12 23:17:11,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-11-12 23:17:11,145 INFO L185 QuantifierPusher]: treesize reduction 34, result has 95.6 percent of original size 736 [2021-11-12 23:17:11,147 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,149 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,151 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,152 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:17:11,155 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:17:11,180 INFO L185 QuantifierPusher]: treesize reduction 13, result has 96.6 percent of original size 366 [2021-11-12 23:17:11,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2613 [2021-11-12 23:17:11,639 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,645 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,650 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,654 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,659 INFO L185 QuantifierPusher]: treesize reduction 17, result has 87.2 percent of original size 116 [2021-11-12 23:17:11,672 INFO L185 QuantifierPusher]: treesize reduction 17, result has 93.6 percent of original size 250 [2021-11-12 23:17:11,675 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,678 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,681 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,688 INFO L185 QuantifierPusher]: treesize reduction 13, result has 92.8 percent of original size 168 [2021-11-12 23:17:11,688 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,695 INFO L185 QuantifierPusher]: treesize reduction 17, result has 89.8 percent of original size 150 [2021-11-12 23:17:11,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 523 [2021-11-12 23:17:11,716 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,721 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,725 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:11,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:11,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-11-12 23:17:11,738 INFO L185 QuantifierPusher]: treesize reduction 17, result has 93.8 percent of original size 255 [2021-11-12 23:17:11,833 INFO L185 QuantifierPusher]: treesize reduction 17, result has 99.1 percent of original size 1811 [2021-11-12 23:17:12,078 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:12,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:12,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 853 [2021-11-12 23:17:12,375 INFO L185 QuantifierPusher]: treesize reduction 17, result has 99.7 percent of original size 5536 [2021-11-12 23:17:12,634 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:12,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:12,654 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:12,659 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:12,662 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:12,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:12,665 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:12,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:12,671 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-11-12 23:17:12,684 INFO L185 QuantifierPusher]: treesize reduction 26, result has 89.9 percent of original size 231 [2021-11-12 23:17:12,685 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:12,688 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:12,690 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:12,691 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:12,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:17:12,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 234 [2021-11-12 23:17:12,786 INFO L185 QuantifierPusher]: treesize reduction 34, result has 95.6 percent of original size 738 [2021-11-12 23:17:12,788 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:12,791 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:12,792 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:12,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:12,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-11-12 23:17:12,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 252 [2021-11-12 23:17:13,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2571 [2021-11-12 23:17:13,250 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,289 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,290 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,292 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,293 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 23:17:13,307 INFO L185 QuantifierPusher]: treesize reduction 34, result has 88.2 percent of original size 255 [2021-11-12 23:17:13,323 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,326 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,330 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,332 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,333 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,349 INFO L185 QuantifierPusher]: treesize reduction 13, result has 90.6 percent of original size 126 [2021-11-12 23:17:13,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 225 [2021-11-12 23:17:13,362 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,365 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,366 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,373 INFO L185 QuantifierPusher]: treesize reduction 17, result has 88.1 percent of original size 126 [2021-11-12 23:17:13,386 INFO L185 QuantifierPusher]: treesize reduction 34, result has 86.9 percent of original size 225 [2021-11-12 23:17:13,401 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 792 [2021-11-12 23:17:13,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 745 [2021-11-12 23:17:13,458 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,465 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,466 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,472 INFO L185 QuantifierPusher]: treesize reduction 13, result has 92.8 percent of original size 168 [2021-11-12 23:17:13,472 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,474 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,475 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,476 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 23:17:13,478 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,482 INFO L185 QuantifierPusher]: treesize reduction 17, result has 88.1 percent of original size 126 [2021-11-12 23:17:13,498 INFO L185 QuantifierPusher]: treesize reduction 68, result has 80.5 percent of original size 280 [2021-11-12 23:17:13,532 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 617 [2021-11-12 23:17:13,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 779 [2021-11-12 23:17:13,566 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,570 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:17:13,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 309 [2021-11-12 23:17:13,593 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2165 [2021-11-12 23:17:13,684 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,691 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,692 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,697 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 210 [2021-11-12 23:17:13,811 INFO L185 QuantifierPusher]: treesize reduction 17, result has 99.3 percent of original size 2358 [2021-11-12 23:17:13,816 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,846 INFO L180 QuantifierPusher]: treesize reduction 34, result has 98.6 percent of original size [2021-11-12 23:17:13,907 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:13,927 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:13,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1983 [2021-11-12 23:17:14,053 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:14,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:14,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1752 [2021-11-12 23:17:14,224 INFO L185 QuantifierPusher]: treesize reduction 17, result has 99.5 percent of original size 3718 [2021-11-12 23:17:15,356 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:15,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:15,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5456 [2021-11-12 23:17:19,279 INFO L185 QuantifierPusher]: treesize reduction 102, result has 99.8 percent of original size 58088 [2021-11-12 23:17:19,468 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,501 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,507 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,509 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,510 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 23:17:19,522 INFO L185 QuantifierPusher]: treesize reduction 34, result has 86.8 percent of original size 223 [2021-11-12 23:17:19,522 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,525 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,529 INFO L185 QuantifierPusher]: treesize reduction 17, result has 87.9 percent of original size 123 [2021-11-12 23:17:19,541 INFO L185 QuantifierPusher]: treesize reduction 30, result has 89.0 percent of original size 243 [2021-11-12 23:17:19,585 INFO L185 QuantifierPusher]: treesize reduction 51, result has 93.5 percent of original size 730 [2021-11-12 23:17:19,596 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 210 [2021-11-12 23:17:19,612 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,614 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,615 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,619 INFO L185 QuantifierPusher]: treesize reduction 13, result has 90.6 percent of original size 126 [2021-11-12 23:17:19,619 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,622 INFO L180 QuantifierPusher]: treesize reduction 13, result has 93.2 percent of original size [2021-11-12 23:17:19,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-12 23:17:19,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 363 [2021-11-12 23:17:19,669 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,704 INFO L180 QuantifierPusher]: treesize reduction 51, result has 95.3 percent of original size [2021-11-12 23:17:19,705 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,707 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,709 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,710 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:19,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:17:19,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 288 [2021-11-12 23:17:19,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4138 [2021-11-12 23:17:19,886 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:19,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:20,337 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:20,361 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:20,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8327 [2021-11-12 23:17:20,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13903 [2021-11-12 23:17:20,758 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:20,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:20,841 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:20,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:20,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-11-12 23:17:21,037 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:21,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:21,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 975 [2021-11-12 23:17:21,789 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45634 [2021-11-12 23:17:22,294 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:22,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:22,333 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:22,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:22,417 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:22,424 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:22,493 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3138 [2021-11-12 23:17:22,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9480 [2021-11-12 23:17:22,910 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5209 [2021-11-12 23:17:23,109 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:23,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:23,130 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:23,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:23,203 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2804 [2021-11-12 23:17:23,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2242 [2021-11-12 23:17:23,519 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:23,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:23,556 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:23,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:23,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2811 [2021-11-12 23:17:23,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3703 [2021-11-12 23:17:23,874 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:23,875 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:23,876 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:17:24,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32344 [2021-11-12 23:17:24,761 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:28,282 INFO L180 QuantifierPusher]: treesize reduction 102, result has 99.8 percent of original size [2021-11-12 23:17:30,043 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:30,061 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:30,170 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:30,189 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:30,332 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4367 [2021-11-12 23:17:30,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5579 [2021-11-12 23:17:31,780 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:31,797 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:31,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2700 [2021-11-12 23:17:34,479 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:34,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:34,702 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:34,732 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:34,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4357 [2021-11-12 23:17:35,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5543 [2021-11-12 23:17:35,855 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:35,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:35,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2693 [2021-11-12 23:17:44,201 WARN L227 SmtUtils]: Spent 7.60s on a formula simplification that was a NOOP. DAG size: 734 (called from [L 184] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2021-11-12 23:17:44,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1127039 [2021-11-12 23:17:44,305 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:59,646 WARN L227 SmtUtils]: Spent 15.34s on a formula simplification. DAG size of input: 929 DAG size of output: 929 (called from [L 179] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2021-11-12 23:17:59,649 INFO L180 QuantifierPusher]: treesize reduction 17, result has 100.0 percent of original size [2021-11-12 23:18:14,658 WARN L227 SmtUtils]: Spent 15.00s on a formula simplification that was a NOOP. DAG size: 929 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:18:21,759 WARN L227 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 556 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:18:36,821 WARN L227 SmtUtils]: Spent 15.05s on a formula simplification that was a NOOP. DAG size: 926 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:18:51,769 WARN L227 SmtUtils]: Spent 14.93s on a formula simplification that was a NOOP. DAG size: 920 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:18:59,262 WARN L227 SmtUtils]: Spent 7.49s on a formula simplification that was a NOOP. DAG size: 868 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:19:14,272 WARN L227 SmtUtils]: Spent 15.00s on a formula simplification that was a NOOP. DAG size: 869 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:19:29,285 WARN L227 SmtUtils]: Spent 15.00s on a formula simplification that was a NOOP. DAG size: 863 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-12 23:19:36,756 WARN L227 SmtUtils]: Spent 7.47s on a formula simplification that was a NOOP. DAG size: 815 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)