./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.11.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_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/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_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/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_c420b9ed-e796-4066-9dda-cd896a2b649a/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 e6d58ee1402596c5930df20d264837b5ad4b9f99cabb69060c7bb3d5f6bf48c4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:22:16,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:22:16,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:22:16,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:22:16,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:22:16,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:22:16,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:22:16,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:22:16,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:22:16,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:22:16,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:22:16,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:22:16,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:22:16,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:22:16,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:22:16,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:22:16,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:22:16,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:22:16,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:22:16,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:22:16,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:22:16,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:22:16,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:22:16,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:22:16,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:22:16,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:22:16,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:22:16,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:22:16,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:22:16,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:22:16,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:22:16,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:22:16,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:22:16,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:22:16,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:22:16,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:22:16,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:22:16,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:22:16,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:22:16,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:22:16,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:22:16,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:22:16,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:22:16,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:22:16,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:22:16,999 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:22:17,000 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:22:17,000 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:22:17,001 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:22:17,001 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:22:17,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:22:17,002 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:22:17,002 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:22:17,003 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:22:17,003 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:22:17,003 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:22:17,004 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:22:17,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:22:17,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:22:17,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:22:17,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:22:17,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:22:17,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:22:17,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:22:17,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:22:17,007 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:22:17,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:22:17,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:22:17,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:22:17,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:22:17,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:22:17,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:22:17,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:22:17,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:22:17,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:22:17,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:22:17,010 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:22:17,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:22:17,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:22:17,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:22:17,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:22:17,012 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_c420b9ed-e796-4066-9dda-cd896a2b649a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6d58ee1402596c5930df20d264837b5ad4b9f99cabb69060c7bb3d5f6bf48c4 [2021-11-03 05:22:17,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:22:17,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:22:17,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:22:17,282 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:22:17,283 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:22:17,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/systemc/transmitter.11.cil.c [2021-11-03 05:22:17,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/data/2a3bf0541/ef1b95fa7a4d43889ab96ec0b493607f/FLAG14b51d69b [2021-11-03 05:22:17,862 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:22:17,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/sv-benchmarks/c/systemc/transmitter.11.cil.c [2021-11-03 05:22:17,886 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/data/2a3bf0541/ef1b95fa7a4d43889ab96ec0b493607f/FLAG14b51d69b [2021-11-03 05:22:18,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/data/2a3bf0541/ef1b95fa7a4d43889ab96ec0b493607f [2021-11-03 05:22:18,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:22:18,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:22:18,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:22:18,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:22:18,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:22:18,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:18,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58d5b0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18, skipping insertion in model container [2021-11-03 05:22:18,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:18,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:22:18,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:22:18,488 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_c420b9ed-e796-4066-9dda-cd896a2b649a/sv-benchmarks/c/systemc/transmitter.11.cil.c[401,414] [2021-11-03 05:22:18,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:22:18,646 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:22:18,666 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_c420b9ed-e796-4066-9dda-cd896a2b649a/sv-benchmarks/c/systemc/transmitter.11.cil.c[401,414] [2021-11-03 05:22:18,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:22:18,789 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:22:18,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18 WrapperNode [2021-11-03 05:22:18,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:22:18,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:22:18,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:22:18,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:22:18,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:18,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:18,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:22:18,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:22:18,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:22:18,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:22:18,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:18,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:18,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:18,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:19,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:19,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:19,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:19,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:22:19,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:22:19,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:22:19,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:22:19,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (1/1) ... [2021-11-03 05:22:19,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:22:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:22:19,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:22:19,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c420b9ed-e796-4066-9dda-cd896a2b649a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:22:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:22:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:22:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:22:19,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:22:24,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:22:24,790 INFO L299 CfgBuilder]: Removed 463 assume(true) statements. [2021-11-03 05:22:24,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:22:24 BoogieIcfgContainer [2021-11-03 05:22:24,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:22:24,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:22:24,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:22:24,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:22:24,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:22:18" (1/3) ... [2021-11-03 05:22:24,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5eeb98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:22:24, skipping insertion in model container [2021-11-03 05:22:24,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:22:18" (2/3) ... [2021-11-03 05:22:24,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5eeb98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:22:24, skipping insertion in model container [2021-11-03 05:22:24,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:22:24" (3/3) ... [2021-11-03 05:22:24,805 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.11.cil.c [2021-11-03 05:22:24,814 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:22:24,814 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:22:24,881 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:22:24,889 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 05:22:24,889 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:22:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 745 states, 743 states have (on average 1.5275908479138627) internal successors, (1135), 744 states have internal predecessors, (1135), 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 05:22:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:22:24,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:24,950 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, 1, 1, 1, 1] [2021-11-03 05:22:24,950 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:22:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1113144403, now seen corresponding path program 1 times [2021-11-03 05:22:24,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:22:24,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827769771] [2021-11-03 05:22:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:24,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:22:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:25,265 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 05:22:25,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:22:25,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827769771] [2021-11-03 05:22:25,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827769771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:25,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:22:25,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:22:25,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955376144] [2021-11-03 05:22:25,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:22:25,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:22:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:22:25,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:22:25,296 INFO L87 Difference]: Start difference. First operand has 745 states, 743 states have (on average 1.5275908479138627) internal successors, (1135), 744 states have internal predecessors, (1135), 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 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:25,722 INFO L93 Difference]: Finished difference Result 2788 states and 4233 transitions. [2021-11-03 05:22:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:22:25,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-03 05:22:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:25,758 INFO L225 Difference]: With dead ends: 2788 [2021-11-03 05:22:25,758 INFO L226 Difference]: Without dead ends: 2039 [2021-11-03 05:22:25,769 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 05:22:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-11-03 05:22:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1943. [2021-11-03 05:22:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 1.4953656024716786) internal successors, (2904), 1942 states have internal predecessors, (2904), 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 05:22:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 2904 transitions. [2021-11-03 05:22:25,917 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 2904 transitions. Word has length 56 [2021-11-03 05:22:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:25,918 INFO L470 AbstractCegarLoop]: Abstraction has 1943 states and 2904 transitions. [2021-11-03 05:22:25,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 2904 transitions. [2021-11-03 05:22:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:22:25,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:25,928 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, 1, 1, 1, 1] [2021-11-03 05:22:25,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:22:25,929 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:22:25,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1814712628, now seen corresponding path program 1 times [2021-11-03 05:22:25,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:22:25,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773444651] [2021-11-03 05:22:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:25,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:22:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:26,039 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 05:22:26,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:22:26,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773444651] [2021-11-03 05:22:26,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773444651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:26,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:22:26,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:22:26,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211865363] [2021-11-03 05:22:26,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:22:26,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:22:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:22:26,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:22:26,043 INFO L87 Difference]: Start difference. First operand 1943 states and 2904 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:26,432 INFO L93 Difference]: Finished difference Result 7396 states and 11023 transitions. [2021-11-03 05:22:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:22:26,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-03 05:22:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:26,463 INFO L225 Difference]: With dead ends: 7396 [2021-11-03 05:22:26,464 INFO L226 Difference]: Without dead ends: 5465 [2021-11-03 05:22:26,467 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 05:22:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2021-11-03 05:22:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 5248. [2021-11-03 05:22:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5248 states, 5247 states have (on average 1.4732227939775109) internal successors, (7730), 5247 states have internal predecessors, (7730), 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 05:22:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5248 states to 5248 states and 7730 transitions. [2021-11-03 05:22:26,666 INFO L78 Accepts]: Start accepts. Automaton has 5248 states and 7730 transitions. Word has length 56 [2021-11-03 05:22:26,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:26,667 INFO L470 AbstractCegarLoop]: Abstraction has 5248 states and 7730 transitions. [2021-11-03 05:22:26,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 5248 states and 7730 transitions. [2021-11-03 05:22:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:22:26,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:26,670 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, 1, 1, 1, 1] [2021-11-03 05:22:26,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:22:26,670 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:22:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1172249899, now seen corresponding path program 1 times [2021-11-03 05:22:26,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:22:26,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881914471] [2021-11-03 05:22:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:26,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:22:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:26,733 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 05:22:26,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:22:26,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881914471] [2021-11-03 05:22:26,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881914471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:26,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:22:26,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:22:26,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8872862] [2021-11-03 05:22:26,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:22:26,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:22:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:22:26,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:22:26,736 INFO L87 Difference]: Start difference. First operand 5248 states and 7730 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:27,345 INFO L93 Difference]: Finished difference Result 20058 states and 29462 transitions. [2021-11-03 05:22:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:22:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-03 05:22:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:27,430 INFO L225 Difference]: With dead ends: 20058 [2021-11-03 05:22:27,430 INFO L226 Difference]: Without dead ends: 14829 [2021-11-03 05:22:27,439 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 05:22:27,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14829 states. [2021-11-03 05:22:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14829 to 14351. [2021-11-03 05:22:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14351 states, 14350 states have (on average 1.45198606271777) internal successors, (20836), 14350 states have internal predecessors, (20836), 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 05:22:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14351 states to 14351 states and 20836 transitions. [2021-11-03 05:22:28,065 INFO L78 Accepts]: Start accepts. Automaton has 14351 states and 20836 transitions. Word has length 56 [2021-11-03 05:22:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:28,066 INFO L470 AbstractCegarLoop]: Abstraction has 14351 states and 20836 transitions. [2021-11-03 05:22:28,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 14351 states and 20836 transitions. [2021-11-03 05:22:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:22:28,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:28,068 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, 1, 1, 1, 1] [2021-11-03 05:22:28,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:22:28,068 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:22:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1572241098, now seen corresponding path program 1 times [2021-11-03 05:22:28,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:22:28,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147585272] [2021-11-03 05:22:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:28,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:22:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:28,127 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 05:22:28,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:22:28,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147585272] [2021-11-03 05:22:28,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147585272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:28,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:22:28,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:22:28,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161763409] [2021-11-03 05:22:28,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:22:28,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:22:28,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:22:28,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:22:28,130 INFO L87 Difference]: Start difference. First operand 14351 states and 20836 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:29,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:29,420 INFO L93 Difference]: Finished difference Result 54853 states and 79435 transitions. [2021-11-03 05:22:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:22:29,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-03 05:22:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:29,528 INFO L225 Difference]: With dead ends: 54853 [2021-11-03 05:22:29,528 INFO L226 Difference]: Without dead ends: 40524 [2021-11-03 05:22:29,552 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 05:22:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40524 states. [2021-11-03 05:22:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40524 to 39406. [2021-11-03 05:22:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39406 states, 39405 states have (on average 1.4316457302372796) internal successors, (56414), 39405 states have internal predecessors, (56414), 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 05:22:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39406 states to 39406 states and 56414 transitions. [2021-11-03 05:22:30,915 INFO L78 Accepts]: Start accepts. Automaton has 39406 states and 56414 transitions. Word has length 56 [2021-11-03 05:22:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:30,916 INFO L470 AbstractCegarLoop]: Abstraction has 39406 states and 56414 transitions. [2021-11-03 05:22:30,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 39406 states and 56414 transitions. [2021-11-03 05:22:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:22:30,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:30,919 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, 1, 1, 1, 1] [2021-11-03 05:22:30,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:22:30,919 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:22:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1597466229, now seen corresponding path program 1 times [2021-11-03 05:22:30,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:22:30,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199671824] [2021-11-03 05:22:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:30,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:22:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:30,973 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 05:22:30,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:22:30,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199671824] [2021-11-03 05:22:30,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199671824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:30,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:22:30,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:22:30,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073171212] [2021-11-03 05:22:30,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:22:30,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:22:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:22:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:22:30,976 INFO L87 Difference]: Start difference. First operand 39406 states and 56414 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:33,296 INFO L93 Difference]: Finished difference Result 149884 states and 214060 transitions. [2021-11-03 05:22:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:22:33,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-03 05:22:33,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:33,546 INFO L225 Difference]: With dead ends: 149884 [2021-11-03 05:22:33,546 INFO L226 Difference]: Without dead ends: 110507 [2021-11-03 05:22:33,613 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 05:22:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110507 states. [2021-11-03 05:22:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110507 to 108221. [2021-11-03 05:22:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108221 states, 108220 states have (on average 1.4121604139715394) internal successors, (152824), 108220 states have internal predecessors, (152824), 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 05:22:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108221 states to 108221 states and 152824 transitions. [2021-11-03 05:22:36,625 INFO L78 Accepts]: Start accepts. Automaton has 108221 states and 152824 transitions. Word has length 56 [2021-11-03 05:22:36,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:36,625 INFO L470 AbstractCegarLoop]: Abstraction has 108221 states and 152824 transitions. [2021-11-03 05:22:36,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:36,626 INFO L276 IsEmpty]: Start isEmpty. Operand 108221 states and 152824 transitions. [2021-11-03 05:22:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:22:36,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:36,628 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, 1, 1, 1, 1] [2021-11-03 05:22:36,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:22:36,628 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:22:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:36,629 INFO L85 PathProgramCache]: Analyzing trace with hash 926030092, now seen corresponding path program 1 times [2021-11-03 05:22:36,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:22:36,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229277470] [2021-11-03 05:22:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:36,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:22:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:36,691 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 05:22:36,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:22:36,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229277470] [2021-11-03 05:22:36,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229277470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:36,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:22:36,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:22:36,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405562459] [2021-11-03 05:22:36,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:22:36,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:22:36,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:22:36,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:22:36,695 INFO L87 Difference]: Start difference. First operand 108221 states and 152824 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:42,711 INFO L93 Difference]: Finished difference Result 408839 states and 576029 transitions. [2021-11-03 05:22:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:22:42,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-03 05:22:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:43,255 INFO L225 Difference]: With dead ends: 408839 [2021-11-03 05:22:43,255 INFO L226 Difference]: Without dead ends: 300654 [2021-11-03 05:22:43,382 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 05:22:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300654 states. [2021-11-03 05:22:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300654 to 296580. [2021-11-03 05:22:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296580 states, 296579 states have (on average 1.3935376408983777) internal successors, (413294), 296579 states have internal predecessors, (413294), 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 05:22:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296580 states to 296580 states and 413294 transitions. [2021-11-03 05:22:51,688 INFO L78 Accepts]: Start accepts. Automaton has 296580 states and 413294 transitions. Word has length 56 [2021-11-03 05:22:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:51,688 INFO L470 AbstractCegarLoop]: Abstraction has 296580 states and 413294 transitions. [2021-11-03 05:22:51,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:22:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 296580 states and 413294 transitions. [2021-11-03 05:22:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:22:51,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:51,690 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, 1, 1, 1, 1] [2021-11-03 05:22:51,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:22:51,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:22:51,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:51,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1131573939, now seen corresponding path program 1 times [2021-11-03 05:22:51,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:22:51,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974238859] [2021-11-03 05:22:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:51,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:22:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:22:51,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:22:51,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974238859] [2021-11-03 05:22:51,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974238859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:51,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:22:51,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:22:51,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526492080] [2021-11-03 05:22:51,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:22:51,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:22:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:22:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:22:51,763 INFO L87 Difference]: Start difference. First operand 296580 states and 413294 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 05:23:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:23:00,508 INFO L93 Difference]: Finished difference Result 651170 states and 910250 transitions. [2021-11-03 05:23:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:23:00,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-03 05:23:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:23:01,143 INFO L225 Difference]: With dead ends: 651170 [2021-11-03 05:23:01,143 INFO L226 Difference]: Without dead ends: 354632 [2021-11-03 05:23:01,357 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 05:23:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354632 states.