./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.04.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_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/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_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.04.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/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_503d6bcd-2252-4b16-9da6-eba4abfc7447/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 1de07d37d630bd073064bf436fb9512b72ab982b0eaf3fcb1582f689c57482fa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:47:53,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:47:53,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:47:53,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:47:53,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:47:53,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:47:53,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:47:53,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:47:53,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:47:53,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:47:53,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:47:53,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:47:53,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:47:53,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:47:53,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:47:53,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:47:53,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:47:54,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:47:54,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:47:54,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:47:54,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:47:54,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:47:54,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:47:54,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:47:54,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:47:54,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:47:54,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:47:54,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:47:54,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:47:54,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:47:54,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:47:54,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:47:54,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:47:54,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:47:54,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:47:54,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:47:54,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:47:54,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:47:54,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:47:54,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:47:54,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:47:54,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:47:54,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:47:54,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:47:54,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:47:54,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:47:54,065 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:47:54,065 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:47:54,065 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:47:54,065 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:47:54,066 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:47:54,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:47:54,067 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:47:54,067 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:47:54,067 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:47:54,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:47:54,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:47:54,068 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:47:54,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:47:54,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:47:54,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:47:54,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:47:54,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:47:54,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:47:54,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:47:54,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:47:54,071 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:47:54,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:47:54,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:47:54,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:47:54,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:47:54,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:47:54,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:47:54,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:47:54,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:47:54,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:47:54,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:47:54,075 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:47:54,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:47:54,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:47:54,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:47:54,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:47:54,077 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_503d6bcd-2252-4b16-9da6-eba4abfc7447/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1de07d37d630bd073064bf436fb9512b72ab982b0eaf3fcb1582f689c57482fa [2021-11-19 15:47:54,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:47:54,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:47:54,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:47:54,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:47:54,414 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:47:54,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/systemc/transmitter.04.cil.c [2021-11-19 15:47:54,504 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/data/cbf9dcf06/aa6b1fc9c7cd475290310cf05ade8cf9/FLAG7778b3977 [2021-11-19 15:47:55,031 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:47:55,032 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/sv-benchmarks/c/systemc/transmitter.04.cil.c [2021-11-19 15:47:55,043 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/data/cbf9dcf06/aa6b1fc9c7cd475290310cf05ade8cf9/FLAG7778b3977 [2021-11-19 15:47:55,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/data/cbf9dcf06/aa6b1fc9c7cd475290310cf05ade8cf9 [2021-11-19 15:47:55,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:47:55,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:47:55,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:47:55,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:47:55,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:47:55,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172f5551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55, skipping insertion in model container [2021-11-19 15:47:55,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:47:55,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:47:55,615 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_503d6bcd-2252-4b16-9da6-eba4abfc7447/sv-benchmarks/c/systemc/transmitter.04.cil.c[706,719] [2021-11-19 15:47:55,706 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:47:55,723 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:47:55,741 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_503d6bcd-2252-4b16-9da6-eba4abfc7447/sv-benchmarks/c/systemc/transmitter.04.cil.c[706,719] [2021-11-19 15:47:55,811 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:47:55,841 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:47:55,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55 WrapperNode [2021-11-19 15:47:55,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:47:55,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:47:55,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:47:55,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:47:55,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,910 INFO L137 Inliner]: procedures = 36, calls = 42, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 378 [2021-11-19 15:47:55,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:47:55,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:47:55,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:47:55,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:47:55,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:55,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:47:55,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:47:55,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:47:55,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:47:55,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (1/1) ... [2021-11-19 15:47:56,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:47:56,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:47:56,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:47:56,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:47:56,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:47:56,096 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 15:47:56,100 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 15:47:56,101 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 15:47:56,101 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 15:47:56,101 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 15:47:56,101 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 15:47:56,101 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 15:47:56,102 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 15:47:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 15:47:56,102 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 15:47:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 15:47:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 15:47:56,103 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 15:47:56,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:47:56,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:47:56,192 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:47:56,194 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:47:56,839 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:47:57,062 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:47:57,062 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-19 15:47:57,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:47:57 BoogieIcfgContainer [2021-11-19 15:47:57,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:47:57,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:47:57,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:47:57,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:47:57,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:47:55" (1/3) ... [2021-11-19 15:47:57,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61535837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:47:57, skipping insertion in model container [2021-11-19 15:47:57,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:55" (2/3) ... [2021-11-19 15:47:57,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61535837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:47:57, skipping insertion in model container [2021-11-19 15:47:57,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:47:57" (3/3) ... [2021-11-19 15:47:57,078 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.04.cil.c [2021-11-19 15:47:57,084 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:47:57,084 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:47:57,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:47:57,144 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 15:47:57,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:47:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 75 states have internal predecessors, (111), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 15:47:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 15:47:57,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:57,182 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] [2021-11-19 15:47:57,182 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2018350875, now seen corresponding path program 1 times [2021-11-19 15:47:57,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:47:57,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517466375] [2021-11-19 15:47:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:57,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:47:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:57,525 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 15:47:57,526 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:47:57,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517466375] [2021-11-19 15:47:57,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517466375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:57,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:57,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:47:57,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320004416] [2021-11-19 15:47:57,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:57,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:47:57,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:47:57,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:47:57,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:57,579 INFO L87 Difference]: Start difference. First operand has 98 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 75 states have internal predecessors, (111), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 15:47:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:58,005 INFO L93 Difference]: Finished difference Result 281 states and 422 transitions. [2021-11-19 15:47:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:47:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 45 [2021-11-19 15:47:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:58,022 INFO L225 Difference]: With dead ends: 281 [2021-11-19 15:47:58,022 INFO L226 Difference]: Without dead ends: 184 [2021-11-19 15:47:58,028 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 15:47:58,032 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 243 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:58,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 354 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:47:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-19 15:47:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2021-11-19 15:47:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 137 states have (on average 1.437956204379562) internal successors, (197), 139 states have internal predecessors, (197), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-19 15:47:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 257 transitions. [2021-11-19 15:47:58,116 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 257 transitions. Word has length 45 [2021-11-19 15:47:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:58,117 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 257 transitions. [2021-11-19 15:47:58,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 15:47:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 257 transitions. [2021-11-19 15:47:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 15:47:58,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:58,122 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] [2021-11-19 15:47:58,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 15:47:58,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash -966901786, now seen corresponding path program 1 times [2021-11-19 15:47:58,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:47:58,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196678516] [2021-11-19 15:47:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:58,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:47:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:47:58,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:47:58,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196678516] [2021-11-19 15:47:58,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196678516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:58,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:58,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 15:47:58,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541304974] [2021-11-19 15:47:58,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:58,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:47:58,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:47:58,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:47:58,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:47:58,326 INFO L87 Difference]: Start difference. First operand 180 states and 257 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 15:47:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:58,986 INFO L93 Difference]: Finished difference Result 1021 states and 1523 transitions. [2021-11-19 15:47:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:47:58,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 45 [2021-11-19 15:47:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:59,016 INFO L225 Difference]: With dead ends: 1021 [2021-11-19 15:47:59,016 INFO L226 Difference]: Without dead ends: 846 [2021-11-19 15:47:59,028 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 15:47:59,029 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 519 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:59,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 575 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:47:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-11-19 15:47:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 810. [2021-11-19 15:47:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 627 states have (on average 1.4242424242424243) internal successors, (893), 635 states have internal predecessors, (893), 122 states have call successors, (122), 60 states have call predecessors, (122), 60 states have return successors, (172), 115 states have call predecessors, (172), 122 states have call successors, (172) [2021-11-19 15:47:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1187 transitions. [2021-11-19 15:47:59,168 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1187 transitions. Word has length 45 [2021-11-19 15:47:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:59,169 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1187 transitions. [2021-11-19 15:47:59,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 15:47:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1187 transitions. [2021-11-19 15:47:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 15:47:59,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:59,172 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] [2021-11-19 15:47:59,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 15:47:59,172 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1938576473, now seen corresponding path program 1 times [2021-11-19 15:47:59,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:47:59,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770460327] [2021-11-19 15:47:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:59,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:47:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:47:59,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:47:59,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770460327] [2021-11-19 15:47:59,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770460327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:59,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:59,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 15:47:59,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329410896] [2021-11-19 15:47:59,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:59,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:47:59,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:47:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:47:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:47:59,250 INFO L87 Difference]: Start difference. First operand 810 states and 1187 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 15:47:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:59,919 INFO L93 Difference]: Finished difference Result 3163 states and 4753 transitions. [2021-11-19 15:47:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:47:59,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 45 [2021-11-19 15:47:59,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:59,956 INFO L225 Difference]: With dead ends: 3163 [2021-11-19 15:47:59,956 INFO L226 Difference]: Without dead ends: 2358 [2021-11-19 15:47:59,962 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 15:47:59,971 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 509 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:59,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 589 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:47:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-11-19 15:48:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2128. [2021-11-19 15:48:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1675 states have (on average 1.4382089552238806) internal successors, (2409), 1681 states have internal predecessors, (2409), 288 states have call successors, (288), 148 states have call predecessors, (288), 164 states have return successors, (494), 299 states have call predecessors, (494), 288 states have call successors, (494) [2021-11-19 15:48:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 3191 transitions. [2021-11-19 15:48:00,213 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 3191 transitions. Word has length 45 [2021-11-19 15:48:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:00,214 INFO L470 AbstractCegarLoop]: Abstraction has 2128 states and 3191 transitions. [2021-11-19 15:48:00,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 15:48:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 3191 transitions. [2021-11-19 15:48:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 15:48:00,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:00,218 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] [2021-11-19 15:48:00,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 15:48:00,218 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1299791994, now seen corresponding path program 1 times [2021-11-19 15:48:00,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:00,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233963946] [2021-11-19 15:48:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:00,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:00,314 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 15:48:00,315 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:00,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233963946] [2021-11-19 15:48:00,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233963946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:00,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:00,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 15:48:00,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658677883] [2021-11-19 15:48:00,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:00,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:48:00,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:48:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:00,317 INFO L87 Difference]: Start difference. First operand 2128 states and 3191 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 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 15:48:00,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:00,876 INFO L93 Difference]: Finished difference Result 5982 states and 8997 transitions. [2021-11-19 15:48:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:48:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 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 45 [2021-11-19 15:48:00,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:00,915 INFO L225 Difference]: With dead ends: 5982 [2021-11-19 15:48:00,916 INFO L226 Difference]: Without dead ends: 3860 [2021-11-19 15:48:00,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:48:00,927 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 431 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:00,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 315 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-11-19 15:48:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3384. [2021-11-19 15:48:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 2687 states have (on average 1.4194268701153703) internal successors, (3814), 2696 states have internal predecessors, (3814), 426 states have call successors, (426), 240 states have call predecessors, (426), 270 states have return successors, (725), 448 states have call predecessors, (725), 426 states have call successors, (725) [2021-11-19 15:48:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 4965 transitions. [2021-11-19 15:48:01,280 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 4965 transitions. Word has length 45 [2021-11-19 15:48:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:01,282 INFO L470 AbstractCegarLoop]: Abstraction has 3384 states and 4965 transitions. [2021-11-19 15:48:01,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 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 15:48:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 4965 transitions. [2021-11-19 15:48:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 15:48:01,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:01,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:01,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 15:48:01,291 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash 602838576, now seen corresponding path program 1 times [2021-11-19 15:48:01,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:01,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336479002] [2021-11-19 15:48:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:01,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:01,442 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 15:48:01,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:01,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336479002] [2021-11-19 15:48:01,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336479002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:01,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:01,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 15:48:01,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037017489] [2021-11-19 15:48:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:01,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:48:01,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:48:01,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:01,446 INFO L87 Difference]: Start difference. First operand 3384 states and 4965 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 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 15:48:02,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:02,268 INFO L93 Difference]: Finished difference Result 10166 states and 14972 transitions. [2021-11-19 15:48:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:48:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 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 46 [2021-11-19 15:48:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:02,364 INFO L225 Difference]: With dead ends: 10166 [2021-11-19 15:48:02,364 INFO L226 Difference]: Without dead ends: 6788 [2021-11-19 15:48:02,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:48:02,379 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 388 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:02,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 315 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6788 states. [2021-11-19 15:48:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6788 to 6046. [2021-11-19 15:48:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6046 states, 4815 states have (on average 1.412461059190031) internal successors, (6801), 4828 states have internal predecessors, (6801), 740 states have call successors, (740), 420 states have call predecessors, (740), 490 states have return successors, (1318), 798 states have call predecessors, (1318), 740 states have call successors, (1318) [2021-11-19 15:48:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 8859 transitions. [2021-11-19 15:48:02,921 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 8859 transitions. Word has length 46 [2021-11-19 15:48:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:02,922 INFO L470 AbstractCegarLoop]: Abstraction has 6046 states and 8859 transitions. [2021-11-19 15:48:02,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 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 15:48:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 8859 transitions. [2021-11-19 15:48:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 15:48:02,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:02,926 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] [2021-11-19 15:48:02,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 15:48:02,927 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1616814173, now seen corresponding path program 1 times [2021-11-19 15:48:02,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:02,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072647930] [2021-11-19 15:48:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:02,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:03,074 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 15:48:03,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:03,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072647930] [2021-11-19 15:48:03,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072647930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:03,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:03,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 15:48:03,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353676265] [2021-11-19 15:48:03,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:03,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:48:03,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:03,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:48:03,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:03,079 INFO L87 Difference]: Start difference. First operand 6046 states and 8859 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 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 15:48:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:04,238 INFO L93 Difference]: Finished difference Result 16750 states and 24959 transitions. [2021-11-19 15:48:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:48:04,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 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 47 [2021-11-19 15:48:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:04,359 INFO L225 Difference]: With dead ends: 16750 [2021-11-19 15:48:04,359 INFO L226 Difference]: Without dead ends: 10710 [2021-11-19 15:48:04,387 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 15:48:04,390 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 357 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:04,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 328 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-11-19 15:48:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 9576. [2021-11-19 15:48:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 7605 states have (on average 1.3982905982905982) internal successors, (10634), 7634 states have internal predecessors, (10634), 1188 states have call successors, (1188), 696 states have call predecessors, (1188), 782 states have return successors, (2091), 1246 states have call predecessors, (2091), 1188 states have call successors, (2091) [2021-11-19 15:48:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 13913 transitions. [2021-11-19 15:48:05,343 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 13913 transitions. Word has length 47 [2021-11-19 15:48:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:05,344 INFO L470 AbstractCegarLoop]: Abstraction has 9576 states and 13913 transitions. [2021-11-19 15:48:05,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 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 15:48:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 13913 transitions. [2021-11-19 15:48:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 15:48:05,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:05,347 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] [2021-11-19 15:48:05,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 15:48:05,348 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:05,349 INFO L85 PathProgramCache]: Analyzing trace with hash -326246836, now seen corresponding path program 1 times [2021-11-19 15:48:05,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:05,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988507542] [2021-11-19 15:48:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:05,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:05,451 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 15:48:05,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:05,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988507542] [2021-11-19 15:48:05,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988507542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:05,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:05,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 15:48:05,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91819812] [2021-11-19 15:48:05,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:05,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:48:05,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:05,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:48:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:05,454 INFO L87 Difference]: Start difference. First operand 9576 states and 13913 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 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 15:48:07,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:07,139 INFO L93 Difference]: Finished difference Result 26222 states and 38781 transitions. [2021-11-19 15:48:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:48:07,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 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 48 [2021-11-19 15:48:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:07,254 INFO L225 Difference]: With dead ends: 26222 [2021-11-19 15:48:07,254 INFO L226 Difference]: Without dead ends: 16652 [2021-11-19 15:48:07,304 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 15:48:07,305 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 358 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:07,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:48:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16652 states. [2021-11-19 15:48:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16652 to 15498. [2021-11-19 15:48:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 12290 states have (on average 1.3807160292921075) internal successors, (16969), 12345 states have internal predecessors, (16969), 1933 states have call successors, (1933), 1166 states have call predecessors, (1933), 1274 states have return successors, (3359), 1987 states have call predecessors, (3359), 1933 states have call successors, (3359) [2021-11-19 15:48:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 22261 transitions. [2021-11-19 15:48:08,834 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 22261 transitions. Word has length 48 [2021-11-19 15:48:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:08,834 INFO L470 AbstractCegarLoop]: Abstraction has 15498 states and 22261 transitions. [2021-11-19 15:48:08,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 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 15:48:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 22261 transitions. [2021-11-19 15:48:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 15:48:08,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:08,837 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] [2021-11-19 15:48:08,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 15:48:08,838 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1092608959, now seen corresponding path program 1 times [2021-11-19 15:48:08,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:08,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551189907] [2021-11-19 15:48:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:08,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:08,901 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 15:48:08,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:08,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551189907] [2021-11-19 15:48:08,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551189907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:08,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:08,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:48:08,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189432439] [2021-11-19 15:48:08,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:08,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:48:08,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:08,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:48:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:48:08,904 INFO L87 Difference]: Start difference. First operand 15498 states and 22261 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 15:48:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:11,108 INFO L93 Difference]: Finished difference Result 45968 states and 67924 transitions. [2021-11-19 15:48:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:48:11,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-19 15:48:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:11,303 INFO L225 Difference]: With dead ends: 45968 [2021-11-19 15:48:11,303 INFO L226 Difference]: Without dead ends: 30475 [2021-11-19 15:48:11,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:48:11,376 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:11,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 226 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30475 states. [2021-11-19 15:48:13,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30475 to 30238. [2021-11-19 15:48:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30238 states, 23827 states have (on average 1.3496873295001468) internal successors, (32159), 23936 states have internal predecessors, (32159), 3862 states have call successors, (3862), 2332 states have call predecessors, (3862), 2548 states have return successors, (6714), 3970 states have call predecessors, (6714), 3862 states have call successors, (6714) [2021-11-19 15:48:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30238 states to 30238 states and 42735 transitions. [2021-11-19 15:48:13,993 INFO L78 Accepts]: Start accepts. Automaton has 30238 states and 42735 transitions. Word has length 49 [2021-11-19 15:48:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:13,993 INFO L470 AbstractCegarLoop]: Abstraction has 30238 states and 42735 transitions. [2021-11-19 15:48:13,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 15:48:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 30238 states and 42735 transitions. [2021-11-19 15:48:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 15:48:14,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:14,003 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:48:14,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 15:48:14,004 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:14,005 INFO L85 PathProgramCache]: Analyzing trace with hash 98197573, now seen corresponding path program 1 times [2021-11-19 15:48:14,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:14,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690966938] [2021-11-19 15:48:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:14,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:48:14,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:14,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690966938] [2021-11-19 15:48:14,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690966938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:14,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:14,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:48:14,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868968502] [2021-11-19 15:48:14,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:14,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:48:14,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:48:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:48:14,083 INFO L87 Difference]: Start difference. First operand 30238 states and 42735 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 15:48:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:16,035 INFO L93 Difference]: Finished difference Result 56778 states and 81509 transitions. [2021-11-19 15:48:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:48:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2021-11-19 15:48:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:16,334 INFO L225 Difference]: With dead ends: 56778 [2021-11-19 15:48:16,334 INFO L226 Difference]: Without dead ends: 41286 [2021-11-19 15:48:16,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:48:16,390 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 78 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:16,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 309 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41286 states. [2021-11-19 15:48:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41286 to 34462. [2021-11-19 15:48:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34462 states, 27577 states have (on average 1.3667911665518366) internal successors, (37692), 27686 states have internal predecessors, (37692), 4099 states have call successors, (4099), 2569 states have call predecessors, (4099), 2785 states have return successors, (6951), 4207 states have call predecessors, (6951), 4099 states have call successors, (6951) [2021-11-19 15:48:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34462 states to 34462 states and 48742 transitions. [2021-11-19 15:48:19,009 INFO L78 Accepts]: Start accepts. Automaton has 34462 states and 48742 transitions. Word has length 67 [2021-11-19 15:48:19,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:19,010 INFO L470 AbstractCegarLoop]: Abstraction has 34462 states and 48742 transitions. [2021-11-19 15:48:19,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 15:48:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 34462 states and 48742 transitions. [2021-11-19 15:48:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 15:48:19,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:19,060 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, 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] [2021-11-19 15:48:19,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 15:48:19,061 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash -65364597, now seen corresponding path program 1 times [2021-11-19 15:48:19,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:19,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190354063] [2021-11-19 15:48:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:19,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 15:48:19,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:19,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190354063] [2021-11-19 15:48:19,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190354063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:19,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112073463] [2021-11-19 15:48:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:19,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:48:19,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:48:19,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:48:19,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 15:48:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:19,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:48:19,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 15:48:19,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 15:48:20,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112073463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:20,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:20,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [5] total 7 [2021-11-19 15:48:20,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183898903] [2021-11-19 15:48:20,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:20,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:20,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:20,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:20,034 INFO L87 Difference]: Start difference. First operand 34462 states and 48742 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:48:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:22,805 INFO L93 Difference]: Finished difference Result 69799 states and 99057 transitions. [2021-11-19 15:48:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:22,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 95 [2021-11-19 15:48:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:23,010 INFO L225 Difference]: With dead ends: 69799 [2021-11-19 15:48:23,011 INFO L226 Difference]: Without dead ends: 41145 [2021-11-19 15:48:23,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:23,090 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 187 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:23,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 350 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41145 states. [2021-11-19 15:48:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41145 to 37010. [2021-11-19 15:48:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37010 states, 29361 states have (on average 1.3368413882360954) internal successors, (39251), 29502 states have internal predecessors, (39251), 4615 states have call successors, (4615), 2905 states have call predecessors, (4615), 3033 states have return successors, (6993), 4603 states have call predecessors, (6993), 4615 states have call successors, (6993) [2021-11-19 15:48:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37010 states to 37010 states and 50859 transitions. [2021-11-19 15:48:25,707 INFO L78 Accepts]: Start accepts. Automaton has 37010 states and 50859 transitions. Word has length 95 [2021-11-19 15:48:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:25,709 INFO L470 AbstractCegarLoop]: Abstraction has 37010 states and 50859 transitions. [2021-11-19 15:48:25,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:48:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 37010 states and 50859 transitions. [2021-11-19 15:48:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 15:48:25,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:25,761 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, 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] [2021-11-19 15:48:25,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:25,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 15:48:25,976 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash 925800076, now seen corresponding path program 1 times [2021-11-19 15:48:25,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:25,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714871622] [2021-11-19 15:48:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:25,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:48:26,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:26,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714871622] [2021-11-19 15:48:26,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714871622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:26,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125288401] [2021-11-19 15:48:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:26,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:48:26,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:48:26,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:48:26,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 15:48:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:48:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:26,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:48:26,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125288401] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:26,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:26,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-19 15:48:26,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763404426] [2021-11-19 15:48:26,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:26,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:26,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:26,616 INFO L87 Difference]: Start difference. First operand 37010 states and 50859 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:48:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:28,981 INFO L93 Difference]: Finished difference Result 78290 states and 107965 transitions. [2021-11-19 15:48:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:28,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 95 [2021-11-19 15:48:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:29,230 INFO L225 Difference]: With dead ends: 78290 [2021-11-19 15:48:29,231 INFO L226 Difference]: Without dead ends: 46930 [2021-11-19 15:48:29,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:29,329 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 139 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:29,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 336 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46930 states. [2021-11-19 15:48:31,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46930 to 40142. [2021-11-19 15:48:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40142 states, 32151 states have (on average 1.345214767814376) internal successors, (43250), 32292 states have internal predecessors, (43250), 4786 states have call successors, (4786), 3076 states have call predecessors, (4786), 3204 states have return successors, (7164), 4774 states have call predecessors, (7164), 4786 states have call successors, (7164) [2021-11-19 15:48:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40142 states to 40142 states and 55200 transitions. [2021-11-19 15:48:31,761 INFO L78 Accepts]: Start accepts. Automaton has 40142 states and 55200 transitions. Word has length 95 [2021-11-19 15:48:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:31,762 INFO L470 AbstractCegarLoop]: Abstraction has 40142 states and 55200 transitions. [2021-11-19 15:48:31,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:48:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 40142 states and 55200 transitions. [2021-11-19 15:48:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 15:48:31,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:31,826 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, 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] [2021-11-19 15:48:31,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:32,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503d6bcd-2252-4b16-9da6-eba4abfc7447/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:48:32,040 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:32,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1133294107, now seen corresponding path program 1 times [2021-11-19 15:48:32,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:32,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376327241] [2021-11-19 15:48:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:32,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 15:48:32,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:32,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376327241] [2021-11-19 15:48:32,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376327241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:32,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:32,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:48:32,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835273547] [2021-11-19 15:48:32,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:32,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:48:32,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:48:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:48:32,104 INFO L87 Difference]: Start difference. First operand 40142 states and 55200 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 15:48:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:34,762 INFO L93 Difference]: Finished difference Result 83613 states and 115341 transitions. [2021-11-19 15:48:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:48:34,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2021-11-19 15:48:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:34,959 INFO L225 Difference]: With dead ends: 83613 [2021-11-19 15:48:34,959 INFO L226 Difference]: Without dead ends: 48144 [2021-11-19 15:48:35,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:48:35,043 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 100 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:35,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 231 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48144 states. [2021-11-19 15:48:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48144 to 30534. [2021-11-19 15:48:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30534 states, 24355 states have (on average 1.3332785875590227) internal successors, (32472), 24466 states have internal predecessors, (32472), 3738 states have call successors, (3738), 2400 states have call predecessors, (3738), 2440 states have return successors, (5162), 3668 states have call predecessors, (5162), 3738 states have call successors, (5162) [2021-11-19 15:48:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30534 states to 30534 states and 41372 transitions. [2021-11-19 15:48:37,275 INFO L78 Accepts]: Start accepts. Automaton has 30534 states and 41372 transitions. Word has length 93 [2021-11-19 15:48:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:37,275 INFO L470 AbstractCegarLoop]: Abstraction has 30534 states and 41372 transitions. [2021-11-19 15:48:37,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 15:48:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30534 states and 41372 transitions. [2021-11-19 15:48:37,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 15:48:37,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:37,305 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, 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] [2021-11-19 15:48:37,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 15:48:37,306 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2049687812, now seen corresponding path program 1 times [2021-11-19 15:48:37,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:37,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228034104] [2021-11-19 15:48:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:37,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:48:37,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:37,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228034104] [2021-11-19 15:48:37,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228034104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:37,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:37,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:48:37,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068270286] [2021-11-19 15:48:37,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:37,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:37,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:48:37,365 INFO L87 Difference]: Start difference. First operand 30534 states and 41372 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 15:48:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:39,565 INFO L93 Difference]: Finished difference Result 47973 states and 66790 transitions. [2021-11-19 15:48:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2021-11-19 15:48:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:39,692 INFO L225 Difference]: With dead ends: 47973 [2021-11-19 15:48:39,692 INFO L226 Difference]: Without dead ends: 30534 [2021-11-19 15:48:39,739 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 15:48:39,740 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 240 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:39,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 354 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-11-19 15:48:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 30116. [2021-11-19 15:48:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30116 states, 23937 states have (on average 1.3123616159084264) internal successors, (31414), 24048 states have internal predecessors, (31414), 3738 states have call successors, (3738), 2400 states have call predecessors, (3738), 2440 states have return successors, (5162), 3668 states have call predecessors, (5162), 3738 states have call successors, (5162) [2021-11-19 15:48:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30116 states to 30116 states and 40314 transitions. [2021-11-19 15:48:41,770 INFO L78 Accepts]: Start accepts. Automaton has 30116 states and 40314 transitions. Word has length 93 [2021-11-19 15:48:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:41,771 INFO L470 AbstractCegarLoop]: Abstraction has 30116 states and 40314 transitions. [2021-11-19 15:48:41,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 15:48:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 30116 states and 40314 transitions. [2021-11-19 15:48:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 15:48:41,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:41,803 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, 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] [2021-11-19 15:48:41,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 15:48:41,803 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1388354021, now seen corresponding path program 1 times [2021-11-19 15:48:41,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:41,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378453394] [2021-11-19 15:48:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:41,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 15:48:42,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:42,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378453394] [2021-11-19 15:48:42,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378453394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:42,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:42,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 15:48:42,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187545457] [2021-11-19 15:48:42,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:42,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:48:42,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:42,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:48:42,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:48:42,017 INFO L87 Difference]: Start difference. First operand 30116 states and 40314 transitions. Second operand has 11 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 15:48:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:47,783 INFO L93 Difference]: Finished difference Result 102197 states and 142025 transitions. [2021-11-19 15:48:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:48:47,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 93 [2021-11-19 15:48:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:48,050 INFO L225 Difference]: With dead ends: 102197 [2021-11-19 15:48:48,051 INFO L226 Difference]: Without dead ends: 76813 [2021-11-19 15:48:48,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:48:48,132 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 963 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:48,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 462 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:48:48,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76813 states.