./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.10.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.10.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9b1b6435eddc4e23f58d3c83bcd8b23a37824b49ae8c9d356ea073bcf02cae1c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:42:16,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:42:16,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:42:16,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:42:16,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:42:16,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:42:16,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:42:16,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:42:16,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:42:16,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:42:16,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:42:17,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:42:17,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:42:17,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:42:17,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:42:17,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:42:17,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:42:17,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:42:17,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:42:17,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:42:17,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:42:17,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:42:17,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:42:17,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:42:17,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:42:17,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:42:17,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:42:17,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:42:17,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:42:17,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:42:17,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:42:17,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:42:17,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:42:17,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:42:17,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:42:17,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:42:17,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:42:17,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:42:17,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:42:17,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:42:17,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:42:17,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:42:17,098 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:42:17,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:42:17,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:42:17,100 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:42:17,100 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:42:17,100 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:42:17,100 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:42:17,100 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:42:17,101 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:42:17,101 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:42:17,101 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:42:17,101 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:42:17,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:42:17,102 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:42:17,102 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:42:17,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:42:17,103 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:42:17,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:42:17,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:42:17,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:42:17,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:42:17,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:42:17,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:42:17,104 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:42:17,104 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:42:17,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:42:17,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:42:17,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:42:17,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:42:17,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:42:17,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:42:17,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:42:17,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:42:17,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:42:17,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:42:17,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:42:17,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:42:17,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:42:17,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:42:17,107 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_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b1b6435eddc4e23f58d3c83bcd8b23a37824b49ae8c9d356ea073bcf02cae1c [2021-11-03 04:42:17,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:42:17,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:42:17,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:42:17,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:42:17,422 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:42:17,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/systemc/transmitter.10.cil.c [2021-11-03 04:42:17,498 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/data/c37925b5d/8002d1a9c88349cdae28acefa5df4819/FLAGe59e279b3 [2021-11-03 04:42:18,109 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:42:18,110 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/sv-benchmarks/c/systemc/transmitter.10.cil.c [2021-11-03 04:42:18,132 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/data/c37925b5d/8002d1a9c88349cdae28acefa5df4819/FLAGe59e279b3 [2021-11-03 04:42:18,380 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/data/c37925b5d/8002d1a9c88349cdae28acefa5df4819 [2021-11-03 04:42:18,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:42:18,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:42:18,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:42:18,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:42:18,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:42:18,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:18,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1a5892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18, skipping insertion in model container [2021-11-03 04:42:18,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:18,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:42:18,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:42:18,693 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_710edac0-fa78-4e5e-9102-5c05ef25d5c3/sv-benchmarks/c/systemc/transmitter.10.cil.c[401,414] [2021-11-03 04:42:18,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:42:18,845 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:42:18,869 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_710edac0-fa78-4e5e-9102-5c05ef25d5c3/sv-benchmarks/c/systemc/transmitter.10.cil.c[401,414] [2021-11-03 04:42:18,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:42:18,972 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:42:18,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18 WrapperNode [2021-11-03 04:42:18,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:42:18,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:42:18,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:42:18,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:42:18,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:42:19,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:42:19,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:42:19,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:42:19,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:42:19,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:42:19,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:42:19,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:42:19,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (1/1) ... [2021-11-03 04:42:19,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:42:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:42:19,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:42:19,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710edac0-fa78-4e5e-9102-5c05ef25d5c3/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:42:19,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:42:19,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:42:19,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:42:19,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:42:24,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:42:24,961 INFO L299 CfgBuilder]: Removed 406 assume(true) statements. [2021-11-03 04:42:24,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:42:24 BoogieIcfgContainer [2021-11-03 04:42:24,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:42:24,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:42:24,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:42:24,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:42:24,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:42:18" (1/3) ... [2021-11-03 04:42:24,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688dee97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:42:24, skipping insertion in model container [2021-11-03 04:42:24,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:42:18" (2/3) ... [2021-11-03 04:42:24,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688dee97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:42:24, skipping insertion in model container [2021-11-03 04:42:24,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:42:24" (3/3) ... [2021-11-03 04:42:24,978 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.10.cil.c [2021-11-03 04:42:24,987 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:42:24,988 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:42:25,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:42:25,050 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:42:25,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:42:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 640 states, 638 states have (on average 1.5297805642633229) internal successors, (976), 639 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:42:25,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:25,099 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:25,100 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1856324102, now seen corresponding path program 1 times [2021-11-03 04:42:25,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:25,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383930732] [2021-11-03 04:42:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:25,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:42:25,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:25,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383930732] [2021-11-03 04:42:25,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383930732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:25,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:25,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:42:25,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499130346] [2021-11-03 04:42:25,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:42:25,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:42:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:42:25,383 INFO L87 Difference]: Start difference. First operand has 640 states, 638 states have (on average 1.5297805642633229) internal successors, (976), 639 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:25,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:25,651 INFO L93 Difference]: Finished difference Result 1812 states and 2760 transitions. [2021-11-03 04:42:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:42:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 04:42:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:25,685 INFO L225 Difference]: With dead ends: 1812 [2021-11-03 04:42:25,685 INFO L226 Difference]: Without dead ends: 1174 [2021-11-03 04:42:25,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:42:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-11-03 04:42:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1171. [2021-11-03 04:42:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 1.5076923076923077) internal successors, (1764), 1170 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1764 transitions. [2021-11-03 04:42:25,855 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1764 transitions. Word has length 52 [2021-11-03 04:42:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:25,855 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 1764 transitions. [2021-11-03 04:42:25,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1764 transitions. [2021-11-03 04:42:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:42:25,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:25,863 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:25,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:42:25,864 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:25,865 INFO L85 PathProgramCache]: Analyzing trace with hash -423489383, now seen corresponding path program 1 times [2021-11-03 04:42:25,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:25,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406909010] [2021-11-03 04:42:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:25,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:42:26,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:26,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406909010] [2021-11-03 04:42:26,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406909010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:26,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:26,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:42:26,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625977678] [2021-11-03 04:42:26,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:42:26,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:26,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:42:26,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:26,036 INFO L87 Difference]: Start difference. First operand 1171 states and 1764 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:26,277 INFO L93 Difference]: Finished difference Result 3891 states and 5842 transitions. [2021-11-03 04:42:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:42:26,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 04:42:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:26,295 INFO L225 Difference]: With dead ends: 3891 [2021-11-03 04:42:26,295 INFO L226 Difference]: Without dead ends: 2733 [2021-11-03 04:42:26,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:42:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-11-03 04:42:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2185. [2021-11-03 04:42:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 1.4945054945054945) internal successors, (3264), 2184 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 3264 transitions. [2021-11-03 04:42:26,405 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 3264 transitions. Word has length 52 [2021-11-03 04:42:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:26,406 INFO L470 AbstractCegarLoop]: Abstraction has 2185 states and 3264 transitions. [2021-11-03 04:42:26,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 3264 transitions. [2021-11-03 04:42:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:42:26,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:26,410 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:26,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:42:26,411 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1715963512, now seen corresponding path program 1 times [2021-11-03 04:42:26,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:26,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839805974] [2021-11-03 04:42:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:26,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:42:26,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:26,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839805974] [2021-11-03 04:42:26,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839805974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:26,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:26,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:42:26,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37062095] [2021-11-03 04:42:26,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:42:26,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:42:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:26,521 INFO L87 Difference]: Start difference. First operand 2185 states and 3264 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:26,888 INFO L93 Difference]: Finished difference Result 7301 states and 10871 transitions. [2021-11-03 04:42:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:42:26,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 04:42:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:26,922 INFO L225 Difference]: With dead ends: 7301 [2021-11-03 04:42:26,923 INFO L226 Difference]: Without dead ends: 5132 [2021-11-03 04:42:26,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:42:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-11-03 04:42:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 4108. [2021-11-03 04:42:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4108 states, 4107 states have (on average 1.4811297784270758) internal successors, (6083), 4107 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4108 states to 4108 states and 6083 transitions. [2021-11-03 04:42:27,104 INFO L78 Accepts]: Start accepts. Automaton has 4108 states and 6083 transitions. Word has length 52 [2021-11-03 04:42:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:27,105 INFO L470 AbstractCegarLoop]: Abstraction has 4108 states and 6083 transitions. [2021-11-03 04:42:27,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4108 states and 6083 transitions. [2021-11-03 04:42:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:42:27,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:27,110 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:27,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:42:27,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash 759035129, now seen corresponding path program 1 times [2021-11-03 04:42:27,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:27,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713172126] [2021-11-03 04:42:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:27,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:42:27,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:27,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713172126] [2021-11-03 04:42:27,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713172126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:27,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:27,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:42:27,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685351908] [2021-11-03 04:42:27,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:42:27,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:27,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:42:27,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:42:27,238 INFO L87 Difference]: Start difference. First operand 4108 states and 6083 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:27,537 INFO L93 Difference]: Finished difference Result 11842 states and 17515 transitions. [2021-11-03 04:42:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:42:27,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 04:42:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:27,589 INFO L225 Difference]: With dead ends: 11842 [2021-11-03 04:42:27,589 INFO L226 Difference]: Without dead ends: 7757 [2021-11-03 04:42:27,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:42:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7757 states. [2021-11-03 04:42:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7757 to 7747. [2021-11-03 04:42:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7747 states, 7746 states have (on average 1.4675961786728635) internal successors, (11368), 7746 states have internal predecessors, (11368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7747 states to 7747 states and 11368 transitions. [2021-11-03 04:42:28,013 INFO L78 Accepts]: Start accepts. Automaton has 7747 states and 11368 transitions. Word has length 52 [2021-11-03 04:42:28,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:28,016 INFO L470 AbstractCegarLoop]: Abstraction has 7747 states and 11368 transitions. [2021-11-03 04:42:28,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:28,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7747 states and 11368 transitions. [2021-11-03 04:42:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:42:28,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:28,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:28,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:42:28,020 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash -817522630, now seen corresponding path program 1 times [2021-11-03 04:42:28,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:28,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828225328] [2021-11-03 04:42:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:28,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:42:28,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:28,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828225328] [2021-11-03 04:42:28,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828225328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:28,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:28,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:42:28,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711930460] [2021-11-03 04:42:28,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:42:28,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:28,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:42:28,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:28,134 INFO L87 Difference]: Start difference. First operand 7747 states and 11368 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:28,910 INFO L93 Difference]: Finished difference Result 25759 states and 37669 transitions. [2021-11-03 04:42:28,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:42:28,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 04:42:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:29,026 INFO L225 Difference]: With dead ends: 25759 [2021-11-03 04:42:29,026 INFO L226 Difference]: Without dead ends: 18042 [2021-11-03 04:42:29,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:42:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18042 states. [2021-11-03 04:42:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18042 to 14618. [2021-11-03 04:42:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14618 states, 14617 states have (on average 1.4539919272080455) internal successors, (21253), 14617 states have internal predecessors, (21253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14618 states to 14618 states and 21253 transitions. [2021-11-03 04:42:29,817 INFO L78 Accepts]: Start accepts. Automaton has 14618 states and 21253 transitions. Word has length 52 [2021-11-03 04:42:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:29,818 INFO L470 AbstractCegarLoop]: Abstraction has 14618 states and 21253 transitions. [2021-11-03 04:42:29,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 14618 states and 21253 transitions. [2021-11-03 04:42:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:42:29,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:29,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:29,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:42:29,820 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1804927035, now seen corresponding path program 1 times [2021-11-03 04:42:29,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:29,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517271315] [2021-11-03 04:42:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:29,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:42:29,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:29,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517271315] [2021-11-03 04:42:29,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517271315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:29,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:29,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:42:29,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990845667] [2021-11-03 04:42:29,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:42:29,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:42:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:42:29,935 INFO L87 Difference]: Start difference. First operand 14618 states and 21253 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:30,743 INFO L93 Difference]: Finished difference Result 43470 states and 63048 transitions. [2021-11-03 04:42:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:42:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 04:42:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:30,818 INFO L225 Difference]: With dead ends: 43470 [2021-11-03 04:42:30,819 INFO L226 Difference]: Without dead ends: 28889 [2021-11-03 04:42:30,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:42:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28889 states. [2021-11-03 04:42:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28889 to 28857. [2021-11-03 04:42:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28857 states, 28856 states have (on average 1.4372747435542002) internal successors, (41474), 28856 states have internal predecessors, (41474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28857 states to 28857 states and 41474 transitions. [2021-11-03 04:42:32,024 INFO L78 Accepts]: Start accepts. Automaton has 28857 states and 41474 transitions. Word has length 52 [2021-11-03 04:42:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:32,025 INFO L470 AbstractCegarLoop]: Abstraction has 28857 states and 41474 transitions. [2021-11-03 04:42:32,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 28857 states and 41474 transitions. [2021-11-03 04:42:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:42:32,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:32,049 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:42:32,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:42:32,050 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:32,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1167966134, now seen corresponding path program 1 times [2021-11-03 04:42:32,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:32,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807143943] [2021-11-03 04:42:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:32,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:42:32,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:32,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807143943] [2021-11-03 04:42:32,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807143943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:32,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:32,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:42:32,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643551017] [2021-11-03 04:42:32,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:42:32,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:42:32,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:32,177 INFO L87 Difference]: Start difference. First operand 28857 states and 41474 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:34,126 INFO L93 Difference]: Finished difference Result 107890 states and 154880 transitions. [2021-11-03 04:42:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:42:34,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:42:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:34,330 INFO L225 Difference]: With dead ends: 107890 [2021-11-03 04:42:34,330 INFO L226 Difference]: Without dead ends: 79072 [2021-11-03 04:42:34,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79072 states. [2021-11-03 04:42:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79072 to 54729. [2021-11-03 04:42:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54729 states, 54728 states have (on average 1.4375456804560738) internal successors, (78674), 54728 states have internal predecessors, (78674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54729 states to 54729 states and 78674 transitions. [2021-11-03 04:42:36,567 INFO L78 Accepts]: Start accepts. Automaton has 54729 states and 78674 transitions. Word has length 68 [2021-11-03 04:42:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:36,568 INFO L470 AbstractCegarLoop]: Abstraction has 54729 states and 78674 transitions. [2021-11-03 04:42:36,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 54729 states and 78674 transitions. [2021-11-03 04:42:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:42:36,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:36,604 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:42:36,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:42:36,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:36,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1023579598, now seen corresponding path program 1 times [2021-11-03 04:42:36,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:36,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422146786] [2021-11-03 04:42:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:36,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-03 04:42:36,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:36,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422146786] [2021-11-03 04:42:36,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422146786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:36,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:36,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:42:36,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142691127] [2021-11-03 04:42:36,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:42:36,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:42:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:36,707 INFO L87 Difference]: Start difference. First operand 54729 states and 78674 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:40,103 INFO L93 Difference]: Finished difference Result 195967 states and 282533 transitions. [2021-11-03 04:42:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:42:40,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 04:42:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:40,438 INFO L225 Difference]: With dead ends: 195967 [2021-11-03 04:42:40,439 INFO L226 Difference]: Without dead ends: 141277 [2021-11-03 04:42:40,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:40,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141277 states. [2021-11-03 04:42:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141277 to 106313. [2021-11-03 04:42:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106313 states, 106312 states have (on average 1.4359432613439687) internal successors, (152658), 106312 states have internal predecessors, (152658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106313 states to 106313 states and 152658 transitions. [2021-11-03 04:42:44,402 INFO L78 Accepts]: Start accepts. Automaton has 106313 states and 152658 transitions. Word has length 70 [2021-11-03 04:42:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:44,402 INFO L470 AbstractCegarLoop]: Abstraction has 106313 states and 152658 transitions. [2021-11-03 04:42:44,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 106313 states and 152658 transitions. [2021-11-03 04:42:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:42:44,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:44,444 INFO L513 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, 1, 1, 1, 1, 1] [2021-11-03 04:42:44,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:42:44,444 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1662081904, now seen corresponding path program 1 times [2021-11-03 04:42:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:44,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188345679] [2021-11-03 04:42:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:44,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:42:44,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:44,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188345679] [2021-11-03 04:42:44,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188345679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:44,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:44,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:42:44,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158272965] [2021-11-03 04:42:44,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:42:44,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:44,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:42:44,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:44,591 INFO L87 Difference]: Start difference. First operand 106313 states and 152658 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:50,138 INFO L93 Difference]: Finished difference Result 310671 states and 446997 transitions. [2021-11-03 04:42:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:42:50,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:42:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:50,612 INFO L225 Difference]: With dead ends: 310671 [2021-11-03 04:42:50,612 INFO L226 Difference]: Without dead ends: 204397 [2021-11-03 04:42:50,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204397 states. [2021-11-03 04:42:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204397 to 156873. [2021-11-03 04:42:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156873 states, 156872 states have (on average 1.4392498342597786) internal successors, (225778), 156872 states have internal predecessors, (225778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156873 states to 156873 states and 225778 transitions. [2021-11-03 04:42:56,512 INFO L78 Accepts]: Start accepts. Automaton has 156873 states and 225778 transitions. Word has length 72 [2021-11-03 04:42:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:56,512 INFO L470 AbstractCegarLoop]: Abstraction has 156873 states and 225778 transitions. [2021-11-03 04:42:56,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 156873 states and 225778 transitions. [2021-11-03 04:42:56,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:42:56,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:56,561 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:56,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 04:42:56,561 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash 221943310, now seen corresponding path program 1 times [2021-11-03 04:42:56,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:42:56,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4417958] [2021-11-03 04:42:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:56,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:42:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 04:42:56,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:42:56,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4417958] [2021-11-03 04:42:56,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4417958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:56,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:56,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:42:56,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070825018] [2021-11-03 04:42:56,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:42:56,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:42:56,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:42:56,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:42:56,643 INFO L87 Difference]: Start difference. First operand 156873 states and 225778 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:08,490 INFO L93 Difference]: Finished difference Result 584346 states and 839650 transitions. [2021-11-03 04:43:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:43:08,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 04:43:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:09,383 INFO L225 Difference]: With dead ends: 584346 [2021-11-03 04:43:09,383 INFO L226 Difference]: Without dead ends: 427512 [2021-11-03 04:43:09,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427512 states.