./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.08.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.08.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0fbb3eaba725aed5c3b8bf09c66f0f1daed4feeee0b9a3792dc033de334e501 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:39:25,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:39:25,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:39:25,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:39:25,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:39:25,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:39:25,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:39:25,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:39:25,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:39:25,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:39:25,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:39:25,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:39:25,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:39:25,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:39:25,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:39:25,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:39:25,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:39:25,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:39:25,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:39:25,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:39:25,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:39:25,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:39:25,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:39:25,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:39:25,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:39:25,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:39:25,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:39:25,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:39:25,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:39:25,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:39:25,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:39:25,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:39:25,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:39:25,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:39:25,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:39:25,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:39:25,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:39:25,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:39:25,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:39:25,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:39:25,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:39:26,000 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:39:26,030 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:39:26,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:39:26,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:39:26,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:39:26,032 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:39:26,032 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:39:26,032 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:39:26,033 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:39:26,033 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:39:26,033 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:39:26,033 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:39:26,034 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:39:26,034 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:39:26,034 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:39:26,034 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:39:26,035 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:39:26,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:39:26,036 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:39:26,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:39:26,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:39:26,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:39:26,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:39:26,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:39:26,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:39:26,038 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:39:26,038 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:39:26,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:39:26,038 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:39:26,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:39:26,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:39:26,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:39:26,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:39:26,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:39:26,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:39:26,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:39:26,041 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:39:26,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:39:26,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:39:26,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:39:26,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:39:26,042 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_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0fbb3eaba725aed5c3b8bf09c66f0f1daed4feeee0b9a3792dc033de334e501 [2021-11-13 01:39:26,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:39:26,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:39:26,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:39:26,367 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:39:26,368 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:39:26,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/systemc/transmitter.08.cil.c [2021-11-13 01:39:26,436 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/data/2b6e54e04/249b8e762d6740da8d8a545164ec7559/FLAG6e254f0b2 [2021-11-13 01:39:27,012 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:39:27,020 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/sv-benchmarks/c/systemc/transmitter.08.cil.c [2021-11-13 01:39:27,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/data/2b6e54e04/249b8e762d6740da8d8a545164ec7559/FLAG6e254f0b2 [2021-11-13 01:39:27,305 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/data/2b6e54e04/249b8e762d6740da8d8a545164ec7559 [2021-11-13 01:39:27,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:39:27,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:39:27,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:39:27,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:39:27,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:39:27,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:27,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6d639a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27, skipping insertion in model container [2021-11-13 01:39:27,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:27,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:39:27,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:39:27,634 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/sv-benchmarks/c/systemc/transmitter.08.cil.c[706,719] [2021-11-13 01:39:27,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:39:27,814 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:39:27,829 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/sv-benchmarks/c/systemc/transmitter.08.cil.c[706,719] [2021-11-13 01:39:27,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:39:27,940 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:39:27,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27 WrapperNode [2021-11-13 01:39:27,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:39:27,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:39:27,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:39:27,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:39:27,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:27,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:28,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:39:28,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:39:28,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:39:28,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:39:28,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:28,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:28,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:28,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:28,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:28,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:28,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:28,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:39:28,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:39:28,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:39:28,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:39:28,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (1/1) ... [2021-11-13 01:39:28,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:39:28,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:28,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:39:28,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e9d721-e233-4ae7-9d33-78c64e87f6df/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:39:28,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:39:28,284 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 01:39:28,284 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 01:39:28,284 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 01:39:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 01:39:28,285 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 01:39:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 01:39:28,285 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 01:39:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 01:39:28,285 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 01:39:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 01:39:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:39:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 01:39:28,286 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 01:39:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:39:28,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:39:29,709 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:39:29,709 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-13 01:39:29,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:39:29 BoogieIcfgContainer [2021-11-13 01:39:29,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:39:29,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:39:29,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:39:29,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:39:29,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:39:27" (1/3) ... [2021-11-13 01:39:29,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2154351d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:39:29, skipping insertion in model container [2021-11-13 01:39:29,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:39:27" (2/3) ... [2021-11-13 01:39:29,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2154351d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:39:29, skipping insertion in model container [2021-11-13 01:39:29,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:39:29" (3/3) ... [2021-11-13 01:39:29,728 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.08.cil.c [2021-11-13 01:39:29,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:39:29,738 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:39:29,815 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:39:29,824 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 [2021-11-13 01:39:29,825 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:39:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 113 states have (on average 1.5486725663716814) internal successors, (175), 115 states have internal predecessors, (175), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-13 01:39:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 01:39:29,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:29,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:29,864 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:29,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1115745721, now seen corresponding path program 1 times [2021-11-13 01:39:29,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:29,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800431944] [2021-11-13 01:39:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:29,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:30,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:30,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800431944] [2021-11-13 01:39:30,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800431944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:30,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:30,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:39:30,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475993554] [2021-11-13 01:39:30,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:30,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:39:30,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:39:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:39:30,321 INFO L87 Difference]: Start difference. First operand has 142 states, 113 states have (on average 1.5486725663716814) internal successors, (175), 115 states have internal predecessors, (175), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-13 01:39:30,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:30,936 INFO L93 Difference]: Finished difference Result 413 states and 642 transitions. [2021-11-13 01:39:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:39:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 61 [2021-11-13 01:39:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:30,970 INFO L225 Difference]: With dead ends: 413 [2021-11-13 01:39:30,970 INFO L226 Difference]: Without dead ends: 272 [2021-11-13 01:39:30,990 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 [2021-11-13 01:39:30,997 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 375 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 332.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.70ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 423.48ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:30,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 578 Invalid, 251 Unknown, 0 Unchecked, 19.70ms Time], IncrementalHoareTripleChecker [13 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 423.48ms Time] [2021-11-13 01:39:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-13 01:39:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2021-11-13 01:39:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 217 states have (on average 1.4976958525345623) internal successors, (325), 219 states have internal predecessors, (325), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-13 01:39:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 401 transitions. [2021-11-13 01:39:31,093 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 401 transitions. Word has length 61 [2021-11-13 01:39:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:31,094 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 401 transitions. [2021-11-13 01:39:31,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-13 01:39:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 401 transitions. [2021-11-13 01:39:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 01:39:31,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:31,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:31,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:39:31,100 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash -985095494, now seen corresponding path program 1 times [2021-11-13 01:39:31,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:31,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044160233] [2021-11-13 01:39:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:31,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:31,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:31,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044160233] [2021-11-13 01:39:31,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044160233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:31,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:31,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 01:39:31,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198615360] [2021-11-13 01:39:31,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:31,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:39:31,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:39:31,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:39:31,308 INFO L87 Difference]: Start difference. First operand 268 states and 401 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-13 01:39:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:32,174 INFO L93 Difference]: Finished difference Result 1549 states and 2443 transitions. [2021-11-13 01:39:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:39:32,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2021-11-13 01:39:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:32,201 INFO L225 Difference]: With dead ends: 1549 [2021-11-13 01:39:32,202 INFO L226 Difference]: Without dead ends: 1286 [2021-11-13 01:39:32,205 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 [2021-11-13 01:39:32,207 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 941 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 570.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.69ms SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 679.92ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:32,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 809 Invalid, 611 Unknown, 0 Unchecked, 17.69ms Time], IncrementalHoareTripleChecker [184 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 679.92ms Time] [2021-11-13 01:39:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-11-13 01:39:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1250. [2021-11-13 01:39:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1027 states have (on average 1.49269717624148) internal successors, (1533), 1035 states have internal predecessors, (1533), 162 states have call successors, (162), 60 states have call predecessors, (162), 60 states have return successors, (244), 155 states have call predecessors, (244), 162 states have call successors, (244) [2021-11-13 01:39:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1939 transitions. [2021-11-13 01:39:32,402 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1939 transitions. Word has length 61 [2021-11-13 01:39:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:32,404 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1939 transitions. [2021-11-13 01:39:32,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-13 01:39:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1939 transitions. [2021-11-13 01:39:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 01:39:32,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:32,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:32,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 01:39:32,424 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:32,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1858573189, now seen corresponding path program 1 times [2021-11-13 01:39:32,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:32,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802688385] [2021-11-13 01:39:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:32,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:32,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:32,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802688385] [2021-11-13 01:39:32,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802688385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:32,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:32,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 01:39:32,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572075447] [2021-11-13 01:39:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:32,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:39:32,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:32,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:39:32,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:39:32,568 INFO L87 Difference]: Start difference. First operand 1250 states and 1939 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-13 01:39:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:33,400 INFO L93 Difference]: Finished difference Result 4923 states and 7865 transitions. [2021-11-13 01:39:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:39:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2021-11-13 01:39:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:33,439 INFO L225 Difference]: With dead ends: 4923 [2021-11-13 01:39:33,439 INFO L226 Difference]: Without dead ends: 3678 [2021-11-13 01:39:33,449 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 [2021-11-13 01:39:33,451 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 943 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 477.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.12ms SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 574.84ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:33,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 816 Invalid, 616 Unknown, 0 Unchecked, 14.12ms Time], IncrementalHoareTripleChecker [184 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 574.84ms Time] [2021-11-13 01:39:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-11-13 01:39:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3416. [2021-11-13 01:39:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 2875 states have (on average 1.5057391304347827) internal successors, (4329), 2849 states have internal predecessors, (4329), 376 states have call successors, (376), 148 states have call predecessors, (376), 164 states have return successors, (726), 419 states have call predecessors, (726), 376 states have call successors, (726) [2021-11-13 01:39:33,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 5431 transitions. [2021-11-13 01:39:33,798 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 5431 transitions. Word has length 61 [2021-11-13 01:39:33,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:33,798 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 5431 transitions. [2021-11-13 01:39:33,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-13 01:39:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 5431 transitions. [2021-11-13 01:39:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 01:39:33,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:33,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:33,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 01:39:33,802 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash 280879706, now seen corresponding path program 1 times [2021-11-13 01:39:33,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:33,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178573620] [2021-11-13 01:39:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:33,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:33,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:33,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178573620] [2021-11-13 01:39:33,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178573620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:33,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:33,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 01:39:33,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634365018] [2021-11-13 01:39:33,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:33,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:39:33,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:39:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:39:33,894 INFO L87 Difference]: Start difference. First operand 3416 states and 5431 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-13 01:39:35,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:35,059 INFO L93 Difference]: Finished difference Result 12583 states and 20719 transitions. [2021-11-13 01:39:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:39:35,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2021-11-13 01:39:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:35,170 INFO L225 Difference]: With dead ends: 12583 [2021-11-13 01:39:35,171 INFO L226 Difference]: Without dead ends: 9172 [2021-11-13 01:39:35,198 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 [2021-11-13 01:39:35,199 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 912 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 526.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.13ms SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 622.24ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:35,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 850 Invalid, 618 Unknown, 0 Unchecked, 10.13ms Time], IncrementalHoareTripleChecker [182 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 622.24ms Time] [2021-11-13 01:39:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9172 states. [2021-11-13 01:39:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9172 to 8584. [2021-11-13 01:39:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8584 states, 7317 states have (on average 1.5176985103184366) internal successors, (11105), 7181 states have internal predecessors, (11105), 846 states have call successors, (846), 348 states have call predecessors, (846), 420 states have return successors, (2042), 1055 states have call predecessors, (2042), 846 states have call successors, (2042) [2021-11-13 01:39:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8584 states to 8584 states and 13993 transitions. [2021-11-13 01:39:35,994 INFO L78 Accepts]: Start accepts. Automaton has 8584 states and 13993 transitions. Word has length 61 [2021-11-13 01:39:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:35,995 INFO L470 AbstractCegarLoop]: Abstraction has 8584 states and 13993 transitions. [2021-11-13 01:39:35,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-13 01:39:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 8584 states and 13993 transitions. [2021-11-13 01:39:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 01:39:35,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:35,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:35,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 01:39:35,998 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:35,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1483936903, now seen corresponding path program 1 times [2021-11-13 01:39:36,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:36,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793674346] [2021-11-13 01:39:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:36,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:36,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:36,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793674346] [2021-11-13 01:39:36,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793674346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:36,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:36,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 01:39:36,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123206604] [2021-11-13 01:39:36,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:36,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:39:36,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:39:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:39:36,076 INFO L87 Difference]: Start difference. First operand 8584 states and 13993 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-13 01:39:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:37,772 INFO L93 Difference]: Finished difference Result 30951 states and 52709 transitions. [2021-11-13 01:39:37,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:39:37,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2021-11-13 01:39:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:37,998 INFO L225 Difference]: With dead ends: 30951 [2021-11-13 01:39:37,998 INFO L226 Difference]: Without dead ends: 22372 [2021-11-13 01:39:38,053 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 [2021-11-13 01:39:38,054 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 889 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 451.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.78ms SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 543.31ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:38,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 877 Invalid, 625 Unknown, 0 Unchecked, 8.78ms Time], IncrementalHoareTripleChecker [180 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 543.31ms Time] [2021-11-13 01:39:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22372 states. [2021-11-13 01:39:39,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22372 to 21128. [2021-11-13 01:39:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21128 states, 18135 states have (on average 1.5316790736145576) internal successors, (27777), 17669 states have internal predecessors, (27777), 1916 states have call successors, (1916), 820 states have call predecessors, (1916), 1076 states have return successors, (5710), 2639 states have call predecessors, (5710), 1916 states have call successors, (5710) [2021-11-13 01:39:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21128 states to 21128 states and 35403 transitions. [2021-11-13 01:39:39,931 INFO L78 Accepts]: Start accepts. Automaton has 21128 states and 35403 transitions. Word has length 61 [2021-11-13 01:39:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:39,932 INFO L470 AbstractCegarLoop]: Abstraction has 21128 states and 35403 transitions. [2021-11-13 01:39:39,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-11-13 01:39:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 21128 states and 35403 transitions. [2021-11-13 01:39:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 01:39:39,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:39,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:39,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 01:39:39,941 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:39,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1541081128, now seen corresponding path program 1 times [2021-11-13 01:39:39,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:39,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136045661] [2021-11-13 01:39:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:39,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:40,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:40,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136045661] [2021-11-13 01:39:40,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136045661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:40,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:40,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:39:40,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728895224] [2021-11-13 01:39:40,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:40,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:39:40,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:39:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:39:40,261 INFO L87 Difference]: Start difference. First operand 21128 states and 35403 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-11-13 01:39:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:43,049 INFO L93 Difference]: Finished difference Result 60276 states and 101252 transitions. [2021-11-13 01:39:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:39:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 61 [2021-11-13 01:39:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:43,327 INFO L225 Difference]: With dead ends: 60276 [2021-11-13 01:39:43,328 INFO L226 Difference]: Without dead ends: 39154 [2021-11-13 01:39:43,398 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 [2021-11-13 01:39:43,401 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 772 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 286.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.15ms SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 354.50ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:43,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 512 Invalid, 356 Unknown, 0 Unchecked, 7.15ms Time], IncrementalHoareTripleChecker [131 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 354.50ms Time] [2021-11-13 01:39:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39154 states. [2021-11-13 01:39:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39154 to 34038. [2021-11-13 01:39:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34038 states, 29329 states have (on average 1.5137236182617886) internal successors, (44396), 28702 states have internal predecessors, (44396), 2872 states have call successors, (2872), 1324 states have call predecessors, (2872), 1836 states have return successors, (8563), 4012 states have call predecessors, (8563), 2872 states have call successors, (8563) [2021-11-13 01:39:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34038 states to 34038 states and 55831 transitions. [2021-11-13 01:39:46,340 INFO L78 Accepts]: Start accepts. Automaton has 34038 states and 55831 transitions. Word has length 61 [2021-11-13 01:39:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:46,342 INFO L470 AbstractCegarLoop]: Abstraction has 34038 states and 55831 transitions. [2021-11-13 01:39:46,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-11-13 01:39:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 34038 states and 55831 transitions. [2021-11-13 01:39:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 01:39:46,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:46,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:46,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 01:39:46,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:46,346 INFO L85 PathProgramCache]: Analyzing trace with hash 479655206, now seen corresponding path program 1 times [2021-11-13 01:39:46,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:46,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387620004] [2021-11-13 01:39:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:46,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:46,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:46,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387620004] [2021-11-13 01:39:46,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387620004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:46,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:46,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:39:46,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711489973] [2021-11-13 01:39:46,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:46,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:39:46,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:46,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:39:46,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:39:46,478 INFO L87 Difference]: Start difference. First operand 34038 states and 55831 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-13 01:39:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:50,073 INFO L93 Difference]: Finished difference Result 107960 states and 176708 transitions. [2021-11-13 01:39:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:39:50,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 62 [2021-11-13 01:39:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:50,533 INFO L225 Difference]: With dead ends: 107960 [2021-11-13 01:39:50,534 INFO L226 Difference]: Without dead ends: 73928 [2021-11-13 01:39:50,647 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 [2021-11-13 01:39:50,648 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 696 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 648.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.80ms SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 715.38ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:50,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 525 Invalid, 357 Unknown, 0 Unchecked, 7.80ms Time], IncrementalHoareTripleChecker [121 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 715.38ms Time] [2021-11-13 01:39:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73928 states. [2021-11-13 01:39:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73928 to 62078. [2021-11-13 01:39:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62078 states, 53625 states have (on average 1.5112913752913752) internal successors, (81043), 52318 states have internal predecessors, (81043), 5068 states have call successors, (5068), 2348 states have call predecessors, (5068), 3384 states have return successors, (16046), 7412 states have call predecessors, (16046), 5068 states have call successors, (16046) [2021-11-13 01:39:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62078 states to 62078 states and 102157 transitions. [2021-11-13 01:39:55,672 INFO L78 Accepts]: Start accepts. Automaton has 62078 states and 102157 transitions. Word has length 62 [2021-11-13 01:39:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:55,675 INFO L470 AbstractCegarLoop]: Abstraction has 62078 states and 102157 transitions. [2021-11-13 01:39:55,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-13 01:39:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 62078 states and 102157 transitions. [2021-11-13 01:39:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 01:39:55,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:55,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:55,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 01:39:55,679 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash 538184111, now seen corresponding path program 1 times [2021-11-13 01:39:55,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:39:55,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098166843] [2021-11-13 01:39:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:55,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:39:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:55,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:55,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098166843] [2021-11-13 01:39:55,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098166843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:55,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:55,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:39:55,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228012620] [2021-11-13 01:39:55,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:55,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:39:55,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:39:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:39:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:39:55,827 INFO L87 Difference]: Start difference. First operand 62078 states and 102157 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-13 01:40:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:40:01,247 INFO L93 Difference]: Finished difference Result 175423 states and 294597 transitions. [2021-11-13 01:40:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:40:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 63 [2021-11-13 01:40:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:40:02,010 INFO L225 Difference]: With dead ends: 175423 [2021-11-13 01:40:02,011 INFO L226 Difference]: Without dead ends: 113351 [2021-11-13 01:40:02,164 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 [2021-11-13 01:40:02,165 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 641 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 306.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.13ms SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 364.22ms IncrementalHoareTripleChecker+Time [2021-11-13 01:40:02,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 555 Invalid, 361 Unknown, 0 Unchecked, 6.13ms Time], IncrementalHoareTripleChecker [131 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 364.22ms Time] [2021-11-13 01:40:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113351 states. [2021-11-13 01:40:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113351 to 97221. [2021-11-13 01:40:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97221 states, 83995 states have (on average 1.5123162092981726) internal successors, (127027), 82458 states have internal predecessors, (127027), 8053 states have call successors, (8053), 3832 states have call predecessors, (8053), 5172 states have return successors, (25856), 10931 states have call predecessors, (25856), 8053 states have call successors, (25856) [2021-11-13 01:40:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97221 states to 97221 states and 160936 transitions. [2021-11-13 01:40:09,053 INFO L78 Accepts]: Start accepts. Automaton has 97221 states and 160936 transitions. Word has length 63 [2021-11-13 01:40:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:40:09,054 INFO L470 AbstractCegarLoop]: Abstraction has 97221 states and 160936 transitions. [2021-11-13 01:40:09,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-13 01:40:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 97221 states and 160936 transitions. [2021-11-13 01:40:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 01:40:09,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:40:09,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:40:09,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 01:40:09,063 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:40:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:40:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1792666306, now seen corresponding path program 1 times [2021-11-13 01:40:09,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:40:09,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562978197] [2021-11-13 01:40:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:40:09,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:40:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:40:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:40:09,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:40:09,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562978197] [2021-11-13 01:40:09,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562978197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:40:09,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:40:09,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:40:09,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860949718] [2021-11-13 01:40:09,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:40:09,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:40:09,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:40:09,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:40:09,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:40:09,186 INFO L87 Difference]: Start difference. First operand 97221 states and 160936 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2021-11-13 01:40:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:40:18,562 INFO L93 Difference]: Finished difference Result 274040 states and 464348 transitions. [2021-11-13 01:40:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:40:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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 64 [2021-11-13 01:40:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:40:20,003 INFO L225 Difference]: With dead ends: 274040 [2021-11-13 01:40:20,003 INFO L226 Difference]: Without dead ends: 176825 [2021-11-13 01:40:20,265 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 [2021-11-13 01:40:20,267 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 678 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 326.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.08ms SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 421.95ms IncrementalHoareTripleChecker+Time [2021-11-13 01:40:20,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 522 Invalid, 359 Unknown, 0 Unchecked, 7.08ms Time], IncrementalHoareTripleChecker [132 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 421.95ms Time] [2021-11-13 01:40:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176825 states.