./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs --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 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:43:06,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:43:06,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:43:06,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:43:06,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:43:06,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:43:06,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:43:06,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:43:06,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:43:06,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:43:06,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:43:06,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:43:06,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:43:06,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:43:06,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:43:06,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:43:06,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:43:06,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:43:06,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:43:06,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:43:06,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:43:06,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:43:06,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:43:06,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:43:06,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:43:06,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:43:06,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:43:06,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:43:06,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:43:06,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:43:06,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:43:06,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:43:06,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:43:06,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:43:06,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:43:06,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:43:06,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:43:06,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:43:06,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:43:06,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:43:06,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:43:06,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:43:06,909 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:43:06,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:43:06,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:43:06,911 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:43:06,911 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:43:06,912 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:43:06,912 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:43:06,913 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:43:06,913 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:43:06,913 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:43:06,914 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:43:06,914 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:43:06,914 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:43:06,915 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:43:06,915 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:43:06,915 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:43:06,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:43:06,917 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:43:06,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:43:06,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:43:06,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:43:06,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:43:06,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:43:06,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:43:06,919 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:43:06,920 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:43:06,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:43:06,920 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:43:06,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:43:06,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:43:06,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:43:06,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:43:06,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:43:06,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:43:06,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:43:06,923 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:43:06,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:43:06,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:43:06,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:43:06,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:43:06,925 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_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 [2021-11-19 13:43:07,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:43:07,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:43:07,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:43:07,254 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:43:07,255 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:43:07,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/systemc/transmitter.09.cil.c [2021-11-19 13:43:07,347 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/data/b39697bdf/adeac97e1cf045e680346e97ba741368/FLAGf85892842 [2021-11-19 13:43:07,985 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:43:07,992 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/sv-benchmarks/c/systemc/transmitter.09.cil.c [2021-11-19 13:43:08,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/data/b39697bdf/adeac97e1cf045e680346e97ba741368/FLAGf85892842 [2021-11-19 13:43:08,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/data/b39697bdf/adeac97e1cf045e680346e97ba741368 [2021-11-19 13:43:08,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:43:08,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:43:08,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:43:08,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:43:08,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:43:08,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:08,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d31738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08, skipping insertion in model container [2021-11-19 13:43:08,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:08,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:43:08,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:43:08,594 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2021-11-19 13:43:08,817 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:43:08,830 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:43:08,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2021-11-19 13:43:08,950 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:43:08,986 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:43:08,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08 WrapperNode [2021-11-19 13:43:08,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:43:08,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:43:08,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:43:08,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:43:08,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,085 INFO L137 Inliner]: procedures = 46, calls = 57, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 663 [2021-11-19 13:43:09,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:43:09,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:43:09,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:43:09,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:43:09,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:43:09,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:43:09,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:43:09,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:43:09,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (1/1) ... [2021-11-19 13:43:09,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:43:09,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:43:09,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:43:09,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f1d990b-3d64-4082-95b2-3173d8feb6a8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:43:09,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:43:09,285 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 13:43:09,286 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 13:43:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 13:43:09,286 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 13:43:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 13:43:09,286 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 13:43:09,287 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 13:43:09,287 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 13:43:09,287 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 13:43:09,287 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 13:43:09,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:43:09,287 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 13:43:09,287 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 13:43:09,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:43:09,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:43:09,414 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:43:09,416 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:43:10,363 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:43:10,793 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:43:10,794 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-19 13:43:10,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:43:10 BoogieIcfgContainer [2021-11-19 13:43:10,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:43:10,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:43:10,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:43:10,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:43:10,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:43:08" (1/3) ... [2021-11-19 13:43:10,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f80d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:43:10, skipping insertion in model container [2021-11-19 13:43:10,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:08" (2/3) ... [2021-11-19 13:43:10,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f80d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:43:10, skipping insertion in model container [2021-11-19 13:43:10,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:43:10" (3/3) ... [2021-11-19 13:43:10,808 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.09.cil.c [2021-11-19 13:43:10,815 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:43:10,815 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:43:10,878 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:43:10,887 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 [2021-11-19 13:43:10,887 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:43:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 123 states have (on average 1.5528455284552845) internal successors, (191), 125 states have internal predecessors, (191), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 13:43:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:43:10,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:10,927 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] [2021-11-19 13:43:10,927 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash 451690190, now seen corresponding path program 1 times [2021-11-19 13:43:10,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:10,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569032907] [2021-11-19 13:43:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:10,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:11,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:11,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569032907] [2021-11-19 13:43:11,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569032907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:11,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:11,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:43:11,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564794857] [2021-11-19 13:43:11,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:11,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:43:11,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:11,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:43:11,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:43:11,570 INFO L87 Difference]: Start difference. First operand has 153 states, 123 states have (on average 1.5528455284552845) internal successors, (191), 125 states have internal predecessors, (191), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:12,055 INFO L93 Difference]: Finished difference Result 442 states and 701 transitions. [2021-11-19 13:43:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:43:12,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2021-11-19 13:43:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:12,075 INFO L225 Difference]: With dead ends: 442 [2021-11-19 13:43:12,076 INFO L226 Difference]: Without dead ends: 290 [2021-11-19 13:43:12,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:43:12,092 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 400 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:12,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 630 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:43:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-19 13:43:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2021-11-19 13:43:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 235 states have (on average 1.4978723404255319) internal successors, (352), 236 states have internal predecessors, (352), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-19 13:43:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 430 transitions. [2021-11-19 13:43:12,222 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 430 transitions. Word has length 65 [2021-11-19 13:43:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:12,224 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 430 transitions. [2021-11-19 13:43:12,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 430 transitions. [2021-11-19 13:43:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:43:12,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:12,238 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] [2021-11-19 13:43:12,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:43:12,239 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash -656438449, now seen corresponding path program 1 times [2021-11-19 13:43:12,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:12,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830054550] [2021-11-19 13:43:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:12,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:12,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:12,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830054550] [2021-11-19 13:43:12,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830054550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:12,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:12,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 13:43:12,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336636895] [2021-11-19 13:43:12,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:12,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:12,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:12,383 INFO L87 Difference]: Start difference. First operand 287 states and 430 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:13,272 INFO L93 Difference]: Finished difference Result 979 states and 1483 transitions. [2021-11-19 13:43:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2021-11-19 13:43:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:13,294 INFO L225 Difference]: With dead ends: 979 [2021-11-19 13:43:13,294 INFO L226 Difference]: Without dead ends: 674 [2021-11-19 13:43:13,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:13,305 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 832 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:13,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 1006 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:43:13,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-19 13:43:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 662. [2021-11-19 13:43:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 557 states have (on average 1.4901256732495511) internal successors, (830), 550 states have internal predecessors, (830), 76 states have call successors, (76), 26 states have call predecessors, (76), 28 states have return successors, (86), 86 states have call predecessors, (86), 76 states have call successors, (86) [2021-11-19 13:43:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 992 transitions. [2021-11-19 13:43:13,443 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 992 transitions. Word has length 65 [2021-11-19 13:43:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:13,445 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 992 transitions. [2021-11-19 13:43:13,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 992 transitions. [2021-11-19 13:43:13,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:43:13,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:13,451 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] [2021-11-19 13:43:13,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:43:13,452 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:13,453 INFO L85 PathProgramCache]: Analyzing trace with hash 811764880, now seen corresponding path program 1 times [2021-11-19 13:43:13,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:13,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975734300] [2021-11-19 13:43:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:13,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:13,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:13,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975734300] [2021-11-19 13:43:13,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975734300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:13,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:13,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 13:43:13,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801425895] [2021-11-19 13:43:13,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:13,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:13,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:13,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:13,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:13,646 INFO L87 Difference]: Start difference. First operand 662 states and 992 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:14,394 INFO L93 Difference]: Finished difference Result 2313 states and 3512 transitions. [2021-11-19 13:43:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2021-11-19 13:43:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:14,415 INFO L225 Difference]: With dead ends: 2313 [2021-11-19 13:43:14,415 INFO L226 Difference]: Without dead ends: 1613 [2021-11-19 13:43:14,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:14,430 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 832 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:14,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 985 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:43:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-19 13:43:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1257. [2021-11-19 13:43:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1060 states have (on average 1.490566037735849) internal successors, (1580), 1054 states have internal predecessors, (1580), 140 states have call successors, (140), 50 states have call predecessors, (140), 56 states have return successors, (169), 153 states have call predecessors, (169), 140 states have call successors, (169) [2021-11-19 13:43:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1889 transitions. [2021-11-19 13:43:14,575 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1889 transitions. Word has length 65 [2021-11-19 13:43:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:14,576 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 1889 transitions. [2021-11-19 13:43:14,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1889 transitions. [2021-11-19 13:43:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:43:14,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:14,581 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] [2021-11-19 13:43:14,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 13:43:14,581 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:14,583 INFO L85 PathProgramCache]: Analyzing trace with hash -496239889, now seen corresponding path program 1 times [2021-11-19 13:43:14,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:14,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177970778] [2021-11-19 13:43:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:14,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:14,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:14,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177970778] [2021-11-19 13:43:14,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177970778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:14,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:14,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:43:14,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502141341] [2021-11-19 13:43:14,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:14,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:43:14,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:14,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:43:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:43:14,764 INFO L87 Difference]: Start difference. First operand 1257 states and 1889 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:15,223 INFO L93 Difference]: Finished difference Result 3732 states and 5702 transitions. [2021-11-19 13:43:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:43:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2021-11-19 13:43:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:15,246 INFO L225 Difference]: With dead ends: 3732 [2021-11-19 13:43:15,246 INFO L226 Difference]: Without dead ends: 2480 [2021-11-19 13:43:15,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:43:15,262 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 415 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:15,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 628 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:43:15,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-11-19 13:43:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2468. [2021-11-19 13:43:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2087 states have (on average 1.4796358409199808) internal successors, (3088), 2075 states have internal predecessors, (3088), 268 states have call successors, (268), 100 states have call predecessors, (268), 112 states have return successors, (323), 293 states have call predecessors, (323), 268 states have call successors, (323) [2021-11-19 13:43:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3679 transitions. [2021-11-19 13:43:15,437 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3679 transitions. Word has length 65 [2021-11-19 13:43:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:15,437 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3679 transitions. [2021-11-19 13:43:15,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3679 transitions. [2021-11-19 13:43:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:43:15,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:15,440 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] [2021-11-19 13:43:15,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 13:43:15,440 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash -96248690, now seen corresponding path program 1 times [2021-11-19 13:43:15,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:15,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72932764] [2021-11-19 13:43:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:15,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:15,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:15,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72932764] [2021-11-19 13:43:15,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72932764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:15,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:15,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 13:43:15,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897558166] [2021-11-19 13:43:15,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:15,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:15,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:15,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:15,538 INFO L87 Difference]: Start difference. First operand 2468 states and 3679 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:16,427 INFO L93 Difference]: Finished difference Result 8394 states and 12722 transitions. [2021-11-19 13:43:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2021-11-19 13:43:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:16,486 INFO L225 Difference]: With dead ends: 8394 [2021-11-19 13:43:16,487 INFO L226 Difference]: Without dead ends: 5771 [2021-11-19 13:43:16,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:16,505 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 832 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:16,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 828 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:43:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2021-11-19 13:43:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 4745. [2021-11-19 13:43:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4745 states, 4012 states have (on average 1.4773180458624127) internal successors, (5927), 4008 states have internal predecessors, (5927), 508 states have call successors, (508), 196 states have call predecessors, (508), 224 states have return successors, (631), 541 states have call predecessors, (631), 508 states have call successors, (631) [2021-11-19 13:43:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 7066 transitions. [2021-11-19 13:43:16,920 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 7066 transitions. Word has length 65 [2021-11-19 13:43:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:16,920 INFO L470 AbstractCegarLoop]: Abstraction has 4745 states and 7066 transitions. [2021-11-19 13:43:16,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 7066 transitions. [2021-11-19 13:43:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 13:43:16,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:16,923 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] [2021-11-19 13:43:16,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 13:43:16,923 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1724898963, now seen corresponding path program 1 times [2021-11-19 13:43:16,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:16,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167959013] [2021-11-19 13:43:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:16,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:16,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:16,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167959013] [2021-11-19 13:43:16,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167959013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:16,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:16,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 13:43:16,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058659620] [2021-11-19 13:43:16,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:16,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:16,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:17,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:17,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:17,000 INFO L87 Difference]: Start difference. First operand 4745 states and 7066 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:18,168 INFO L93 Difference]: Finished difference Result 15917 states and 24185 transitions. [2021-11-19 13:43:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:18,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2021-11-19 13:43:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:18,283 INFO L225 Difference]: With dead ends: 15917 [2021-11-19 13:43:18,284 INFO L226 Difference]: Without dead ends: 10869 [2021-11-19 13:43:18,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:18,320 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 834 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:18,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 829 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:43:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10869 states. [2021-11-19 13:43:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10869 to 9251. [2021-11-19 13:43:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9251 states, 7798 states have (on average 1.4717876378558605) internal successors, (11477), 7810 states have internal predecessors, (11477), 1004 states have call successors, (1004), 388 states have call predecessors, (1004), 448 states have return successors, (1271), 1053 states have call predecessors, (1271), 1004 states have call successors, (1271) [2021-11-19 13:43:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9251 states to 9251 states and 13752 transitions. [2021-11-19 13:43:19,200 INFO L78 Accepts]: Start accepts. Automaton has 9251 states and 13752 transitions. Word has length 65 [2021-11-19 13:43:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:19,203 INFO L470 AbstractCegarLoop]: Abstraction has 9251 states and 13752 transitions. [2021-11-19 13:43:19,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:43:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 9251 states and 13752 transitions. [2021-11-19 13:43:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 13:43:19,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:19,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:43:19,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 13:43:19,218 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:19,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:19,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1030161032, now seen corresponding path program 1 times [2021-11-19 13:43:19,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:19,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524712134] [2021-11-19 13:43:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:19,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:43:19,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:19,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524712134] [2021-11-19 13:43:19,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524712134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:19,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:19,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:43:19,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453761089] [2021-11-19 13:43:19,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:19,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:43:19,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:43:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:43:19,367 INFO L87 Difference]: Start difference. First operand 9251 states and 13752 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:43:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:21,068 INFO L93 Difference]: Finished difference Result 28763 states and 42889 transitions. [2021-11-19 13:43:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:43:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-11-19 13:43:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:21,230 INFO L225 Difference]: With dead ends: 28763 [2021-11-19 13:43:21,231 INFO L226 Difference]: Without dead ends: 19518 [2021-11-19 13:43:21,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:43:21,270 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 844 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:21,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 562 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:43:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19518 states. [2021-11-19 13:43:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19518 to 15560. [2021-11-19 13:43:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15560 states, 13267 states have (on average 1.4579784427526947) internal successors, (19343), 13290 states have internal predecessors, (19343), 1524 states have call successors, (1524), 648 states have call predecessors, (1524), 768 states have return successors, (2058), 1622 states have call predecessors, (2058), 1524 states have call successors, (2058) [2021-11-19 13:43:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15560 states to 15560 states and 22925 transitions. [2021-11-19 13:43:22,672 INFO L78 Accepts]: Start accepts. Automaton has 15560 states and 22925 transitions. Word has length 84 [2021-11-19 13:43:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:22,673 INFO L470 AbstractCegarLoop]: Abstraction has 15560 states and 22925 transitions. [2021-11-19 13:43:22,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:43:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 15560 states and 22925 transitions. [2021-11-19 13:43:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 13:43:22,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:22,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:43:22,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 13:43:22,687 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash 811186100, now seen corresponding path program 1 times [2021-11-19 13:43:22,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:22,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409038990] [2021-11-19 13:43:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:22,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:43:22,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:22,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409038990] [2021-11-19 13:43:22,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409038990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:22,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:22,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:43:22,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247342422] [2021-11-19 13:43:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:22,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:43:22,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:43:22,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:43:22,807 INFO L87 Difference]: Start difference. First operand 15560 states and 22925 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:43:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:25,257 INFO L93 Difference]: Finished difference Result 57632 states and 85106 transitions. [2021-11-19 13:43:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:43:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 86 [2021-11-19 13:43:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:25,542 INFO L225 Difference]: With dead ends: 57632 [2021-11-19 13:43:25,542 INFO L226 Difference]: Without dead ends: 42078 [2021-11-19 13:43:25,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:43:25,625 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 873 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:25,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 533 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:43:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42078 states. [2021-11-19 13:43:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42078 to 30516. [2021-11-19 13:43:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30516 states, 26031 states have (on average 1.451615381660328) internal successors, (37787), 26080 states have internal predecessors, (37787), 2948 states have call successors, (2948), 1296 states have call predecessors, (2948), 1536 states have return successors, (3956), 3140 states have call predecessors, (3956), 2948 states have call successors, (3956) [2021-11-19 13:43:27,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30516 states to 30516 states and 44691 transitions. [2021-11-19 13:43:27,975 INFO L78 Accepts]: Start accepts. Automaton has 30516 states and 44691 transitions. Word has length 86 [2021-11-19 13:43:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:27,975 INFO L470 AbstractCegarLoop]: Abstraction has 30516 states and 44691 transitions. [2021-11-19 13:43:27,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:43:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 30516 states and 44691 transitions. [2021-11-19 13:43:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 13:43:27,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:27,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:43:27,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 13:43:27,999 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:28,000 INFO L85 PathProgramCache]: Analyzing trace with hash -623132136, now seen corresponding path program 1 times [2021-11-19 13:43:28,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:28,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216244969] [2021-11-19 13:43:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:28,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:43:28,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:28,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216244969] [2021-11-19 13:43:28,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216244969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:28,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:28,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:43:28,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234710413] [2021-11-19 13:43:28,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:28,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:43:28,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:28,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:43:28,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:43:28,161 INFO L87 Difference]: Start difference. First operand 30516 states and 44691 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:43:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:31,091 INFO L93 Difference]: Finished difference Result 87320 states and 128405 transitions. [2021-11-19 13:43:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:43:31,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 88 [2021-11-19 13:43:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:31,387 INFO L225 Difference]: With dead ends: 87320 [2021-11-19 13:43:31,387 INFO L226 Difference]: Without dead ends: 56810 [2021-11-19 13:43:31,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:43:31,491 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 715 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:31,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 720 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:43:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56810 states. [2021-11-19 13:43:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56810 to 45176. [2021-11-19 13:43:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45176 states, 38483 states have (on average 1.4461190655614167) internal successors, (55651), 38524 states have internal predecessors, (55651), 4388 states have call successors, (4388), 1952 states have call predecessors, (4388), 2304 states have return successors, (5836), 4700 states have call predecessors, (5836), 4388 states have call successors, (5836) [2021-11-19 13:43:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45176 states to 45176 states and 65875 transitions. [2021-11-19 13:43:35,382 INFO L78 Accepts]: Start accepts. Automaton has 45176 states and 65875 transitions. Word has length 88 [2021-11-19 13:43:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:35,382 INFO L470 AbstractCegarLoop]: Abstraction has 45176 states and 65875 transitions. [2021-11-19 13:43:35,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:43:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 45176 states and 65875 transitions. [2021-11-19 13:43:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-19 13:43:35,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:35,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:43:35,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 13:43:35,414 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:35,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1657797372, now seen corresponding path program 1 times [2021-11-19 13:43:35,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:35,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281435818] [2021-11-19 13:43:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:35,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:43:35,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:35,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281435818] [2021-11-19 13:43:35,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281435818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:35,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:35,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:43:35,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686971667] [2021-11-19 13:43:35,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:35,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:43:35,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:35,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:43:35,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:43:35,574 INFO L87 Difference]: Start difference. First operand 45176 states and 65875 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:43:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:40,637 INFO L93 Difference]: Finished difference Result 127092 states and 186261 transitions. [2021-11-19 13:43:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:43:40,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 90 [2021-11-19 13:43:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:41,015 INFO L225 Difference]: With dead ends: 127092 [2021-11-19 13:43:41,015 INFO L226 Difference]: Without dead ends: 81922 [2021-11-19 13:43:41,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:43:41,163 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 698 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:41,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 705 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:43:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81922 states. [2021-11-19 13:43:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81922 to 66992. [2021-11-19 13:43:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66992 states, 56995 states have (on average 1.4404596894464428) internal successors, (82099), 56996 states have internal predecessors, (82099), 6540 states have call successors, (6540), 2944 states have call predecessors, (6540), 3456 states have return successors, (8604), 7052 states have call predecessors, (8604), 6540 states have call successors, (8604) [2021-11-19 13:43:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66992 states to 66992 states and 97243 transitions. [2021-11-19 13:43:45,492 INFO L78 Accepts]: Start accepts. Automaton has 66992 states and 97243 transitions. Word has length 90 [2021-11-19 13:43:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:45,494 INFO L470 AbstractCegarLoop]: Abstraction has 66992 states and 97243 transitions. [2021-11-19 13:43:45,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:43:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 66992 states and 97243 transitions. [2021-11-19 13:43:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 13:43:45,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:45,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:43:45,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 13:43:45,528 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1782043176, now seen corresponding path program 1 times [2021-11-19 13:43:45,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:45,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304821527] [2021-11-19 13:43:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:45,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:43:45,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:45,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304821527] [2021-11-19 13:43:45,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304821527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:45,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:45,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:43:45,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086956500] [2021-11-19 13:43:45,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:45,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:43:45,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:43:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:43:45,655 INFO L87 Difference]: Start difference. First operand 66992 states and 97243 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:43:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:54,312 INFO L93 Difference]: Finished difference Result 232164 states and 338678 transitions. [2021-11-19 13:43:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:43:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 92 [2021-11-19 13:43:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:55,266 INFO L225 Difference]: With dead ends: 232164 [2021-11-19 13:43:55,267 INFO L226 Difference]: Without dead ends: 165178 [2021-11-19 13:43:55,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:43:55,537 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 764 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:55,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 518 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:43:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165178 states. [2021-11-19 13:44:03,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165178 to 131224. [2021-11-19 13:44:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131224 states, 111667 states have (on average 1.4332882588410183) internal successors, (160051), 111700 states have internal predecessors, (160051), 12644 states have call successors, (12644), 5888 states have call predecessors, (12644), 6912 states have return successors, (16516), 13636 states have call predecessors, (16516), 12644 states have call successors, (16516) [2021-11-19 13:44:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131224 states to 131224 states and 189211 transitions. [2021-11-19 13:44:04,224 INFO L78 Accepts]: Start accepts. Automaton has 131224 states and 189211 transitions. Word has length 92 [2021-11-19 13:44:04,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:04,225 INFO L470 AbstractCegarLoop]: Abstraction has 131224 states and 189211 transitions. [2021-11-19 13:44:04,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:44:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 131224 states and 189211 transitions. [2021-11-19 13:44:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-19 13:44:04,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:04,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:44:04,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 13:44:04,284 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1680950204, now seen corresponding path program 1 times [2021-11-19 13:44:04,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:44:04,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549525564] [2021-11-19 13:44:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:04,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:44:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 13:44:04,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:44:04,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549525564] [2021-11-19 13:44:04,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549525564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:44:04,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:44:04,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:44:04,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282927619] [2021-11-19 13:44:04,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:04,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:44:04,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:44:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:44:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:44:04,396 INFO L87 Difference]: Start difference. First operand 131224 states and 189211 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)