./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.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_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/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_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/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_157ab575-64e7-49b7-a3fc-90818b866265/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 902bb87ef2cba4901bb7aec7f3c25f49bc9b58379e1d80892a98947dfab17620 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:30:37,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:30:37,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:30:37,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:30:37,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:30:37,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:30:37,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:30:37,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:30:37,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:30:37,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:30:37,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:30:37,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:30:37,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:30:37,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:30:37,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:30:37,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:30:37,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:30:37,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:30:37,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:30:37,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:30:37,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:30:37,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:30:37,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:30:37,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:30:37,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:30:37,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:30:37,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:30:37,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:30:37,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:30:37,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:30:37,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:30:37,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:30:37,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:30:37,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:30:37,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:30:37,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:30:37,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:30:37,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:30:37,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:30:37,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:30:37,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:30:37,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:30:37,988 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:30:37,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:30:37,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:30:37,990 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:30:37,990 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:30:37,991 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:30:37,991 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:30:37,991 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:30:37,991 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:30:37,992 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:30:37,993 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:30:37,993 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:30:37,993 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:30:37,994 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:30:37,994 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:30:37,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:30:37,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:30:37,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:30:37,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:30:37,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:30:37,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:30:37,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:30:37,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:30:37,997 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:30:37,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:30:37,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:30:37,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:30:37,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:30:37,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:30:38,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:30:38,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:30:38,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:30:38,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:30:38,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:30:38,001 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:30:38,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:30:38,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:30:38,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:30:38,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:30:38,002 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_157ab575-64e7-49b7-a3fc-90818b866265/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 902bb87ef2cba4901bb7aec7f3c25f49bc9b58379e1d80892a98947dfab17620 [2021-11-03 05:30:38,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:30:38,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:30:38,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:30:38,315 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:30:38,316 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:30:38,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2021-11-03 05:30:38,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/data/62d951959/04622948440a49939320ba17ca95fee9/FLAGe3f166c50 [2021-11-03 05:30:39,052 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:30:39,056 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2021-11-03 05:30:39,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/data/62d951959/04622948440a49939320ba17ca95fee9/FLAGe3f166c50 [2021-11-03 05:30:39,314 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/data/62d951959/04622948440a49939320ba17ca95fee9 [2021-11-03 05:30:39,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:30:39,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:30:39,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:30:39,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:30:39,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:30:39,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:39,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6830e0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39, skipping insertion in model container [2021-11-03 05:30:39,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:39,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:30:39,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:30:39,602 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_157ab575-64e7-49b7-a3fc-90818b866265/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[366,379] [2021-11-03 05:30:39,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:30:39,740 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:30:39,751 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_157ab575-64e7-49b7-a3fc-90818b866265/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[366,379] [2021-11-03 05:30:39,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:30:39,883 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:30:39,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39 WrapperNode [2021-11-03 05:30:39,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:30:39,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:30:39,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:30:39,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:30:39,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:39,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:40,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:30:40,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:30:40,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:30:40,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:30:40,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:40,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:40,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:40,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:40,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:40,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:40,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:40,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:30:40,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:30:40,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:30:40,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:30:40,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (1/1) ... [2021-11-03 05:30:40,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:30:40,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:30:40,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:30:40,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157ab575-64e7-49b7-a3fc-90818b866265/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:30:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:30:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:30:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:30:40,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:30:48,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:30:48,220 INFO L299 CfgBuilder]: Removed 620 assume(true) statements. [2021-11-03 05:30:48,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:30:48 BoogieIcfgContainer [2021-11-03 05:30:48,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:30:48,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:30:48,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:30:48,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:30:48,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:30:39" (1/3) ... [2021-11-03 05:30:48,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1339537d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:30:48, skipping insertion in model container [2021-11-03 05:30:48,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:30:39" (2/3) ... [2021-11-03 05:30:48,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1339537d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:30:48, skipping insertion in model container [2021-11-03 05:30:48,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:30:48" (3/3) ... [2021-11-03 05:30:48,236 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.13.cil-2.c [2021-11-03 05:30:48,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:30:48,242 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:30:48,312 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:30:48,322 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 05:30:48,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:30:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 1035 states, 1033 states have (on average 1.5227492739593418) internal successors, (1573), 1034 states have internal predecessors, (1573), 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 05:30:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:30:48,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:30:48,374 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 05:30:48,375 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:30:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:30:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash 809685715, now seen corresponding path program 1 times [2021-11-03 05:30:48,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:30:48,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051482289] [2021-11-03 05:30:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:48,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:30:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:48,616 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 05:30:48,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:30:48,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051482289] [2021-11-03 05:30:48,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051482289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:30:48,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:30:48,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:30:48,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525090686] [2021-11-03 05:30:48,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:30:48,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:30:48,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:30:48,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:30:48,646 INFO L87 Difference]: Start difference. First operand has 1035 states, 1033 states have (on average 1.5227492739593418) internal successors, (1573), 1034 states have internal predecessors, (1573), 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 05:30:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:30:48,888 INFO L93 Difference]: Finished difference Result 3025 states and 4591 transitions. [2021-11-03 05:30:48,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:30:48,890 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 05:30:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:30:48,922 INFO L225 Difference]: With dead ends: 3025 [2021-11-03 05:30:48,923 INFO L226 Difference]: Without dead ends: 1988 [2021-11-03 05:30:48,938 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 05:30:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-11-03 05:30:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1934. [2021-11-03 05:30:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 1.5064666321779616) internal successors, (2912), 1933 states have internal predecessors, (2912), 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 05:30:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2912 transitions. [2021-11-03 05:30:49,088 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2912 transitions. Word has length 52 [2021-11-03 05:30:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:30:49,089 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 2912 transitions. [2021-11-03 05:30:49,090 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 05:30:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2912 transitions. [2021-11-03 05:30:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 05:30:49,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:30:49,105 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:30:49,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:30:49,106 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:30:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:30:49,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2080041094, now seen corresponding path program 1 times [2021-11-03 05:30:49,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:30:49,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044354553] [2021-11-03 05:30:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:49,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:30:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:30:49,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:30:49,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044354553] [2021-11-03 05:30:49,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044354553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:30:49,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:30:49,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:30:49,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805180706] [2021-11-03 05:30:49,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:30:49,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:30:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:30:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:30:49,302 INFO L87 Difference]: Start difference. First operand 1934 states and 2912 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:30:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:30:49,765 INFO L93 Difference]: Finished difference Result 6574 states and 9870 transitions. [2021-11-03 05:30:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:30:49,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 113 [2021-11-03 05:30:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:30:49,795 INFO L225 Difference]: With dead ends: 6574 [2021-11-03 05:30:49,795 INFO L226 Difference]: Without dead ends: 4649 [2021-11-03 05:30:49,799 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 05:30:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-11-03 05:30:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 3667. [2021-11-03 05:30:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3667 states, 3666 states have (on average 1.4953627932351337) internal successors, (5482), 3666 states have internal predecessors, (5482), 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 05:30:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 5482 transitions. [2021-11-03 05:30:49,947 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 5482 transitions. Word has length 113 [2021-11-03 05:30:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:30:49,947 INFO L470 AbstractCegarLoop]: Abstraction has 3667 states and 5482 transitions. [2021-11-03 05:30:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:30:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 5482 transitions. [2021-11-03 05:30:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 05:30:49,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:30:49,957 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:30:49,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:30:49,958 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:30:49,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:30:49,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1518451302, now seen corresponding path program 1 times [2021-11-03 05:30:49,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:30:49,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009777110] [2021-11-03 05:30:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:49,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:30:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:30:50,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:30:50,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009777110] [2021-11-03 05:30:50,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009777110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:30:50,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:30:50,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:30:50,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985952222] [2021-11-03 05:30:50,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:30:50,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:30:50,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:30:50,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:30:50,097 INFO L87 Difference]: Start difference. First operand 3667 states and 5482 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:30:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:30:50,533 INFO L93 Difference]: Finished difference Result 12508 states and 18643 transitions. [2021-11-03 05:30:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:30:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 113 [2021-11-03 05:30:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:30:50,582 INFO L225 Difference]: With dead ends: 12508 [2021-11-03 05:30:50,582 INFO L226 Difference]: Without dead ends: 8857 [2021-11-03 05:30:50,589 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 05:30:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8857 states. [2021-11-03 05:30:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8857 to 6996. [2021-11-03 05:30:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 1.484060042887777) internal successors, (10381), 6995 states have internal predecessors, (10381), 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 05:30:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 10381 transitions. [2021-11-03 05:30:50,947 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 10381 transitions. Word has length 113 [2021-11-03 05:30:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:30:50,948 INFO L470 AbstractCegarLoop]: Abstraction has 6996 states and 10381 transitions. [2021-11-03 05:30:50,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:30:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 10381 transitions. [2021-11-03 05:30:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 05:30:50,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:30:50,959 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:30:50,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:30:50,959 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:30:50,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:30:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1773459129, now seen corresponding path program 1 times [2021-11-03 05:30:50,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:30:50,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674843856] [2021-11-03 05:30:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:50,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:30:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:30:51,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:30:51,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674843856] [2021-11-03 05:30:51,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674843856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:30:51,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:30:51,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:30:51,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606057729] [2021-11-03 05:30:51,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:30:51,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:30:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:30:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:30:51,073 INFO L87 Difference]: Start difference. First operand 6996 states and 10381 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 05:30:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:30:51,468 INFO L93 Difference]: Finished difference Result 20366 states and 30183 transitions. [2021-11-03 05:30:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:30:51,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 113 [2021-11-03 05:30:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:30:51,541 INFO L225 Difference]: With dead ends: 20366 [2021-11-03 05:30:51,541 INFO L226 Difference]: Without dead ends: 13393 [2021-11-03 05:30:51,555 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 05:30:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13393 states. [2021-11-03 05:30:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13393 to 13383. [2021-11-03 05:30:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13383 states, 13382 states have (on average 1.4725751008817816) internal successors, (19706), 13382 states have internal predecessors, (19706), 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 05:30:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13383 states to 13383 states and 19706 transitions. [2021-11-03 05:30:52,147 INFO L78 Accepts]: Start accepts. Automaton has 13383 states and 19706 transitions. Word has length 113 [2021-11-03 05:30:52,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:30:52,148 INFO L470 AbstractCegarLoop]: Abstraction has 13383 states and 19706 transitions. [2021-11-03 05:30:52,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 05:30:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 13383 states and 19706 transitions. [2021-11-03 05:30:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 05:30:52,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:30:52,169 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:30:52,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:30:52,170 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:30:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:30:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2046454552, now seen corresponding path program 1 times [2021-11-03 05:30:52,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:30:52,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929689544] [2021-11-03 05:30:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:52,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:30:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:30:52,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:30:52,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929689544] [2021-11-03 05:30:52,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929689544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:30:52,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:30:52,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:30:52,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711429930] [2021-11-03 05:30:52,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:30:52,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:30:52,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:30:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:30:52,236 INFO L87 Difference]: Start difference. First operand 13383 states and 19706 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:30:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:30:53,277 INFO L93 Difference]: Finished difference Result 45685 states and 67050 transitions. [2021-11-03 05:30:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:30:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 113 [2021-11-03 05:30:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:30:53,346 INFO L225 Difference]: With dead ends: 45685 [2021-11-03 05:30:53,347 INFO L226 Difference]: Without dead ends: 32328 [2021-11-03 05:30:53,366 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 05:30:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32328 states. [2021-11-03 05:30:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32328 to 25622. [2021-11-03 05:30:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25622 states, 25621 states have (on average 1.4609500019515242) internal successors, (37431), 25621 states have internal predecessors, (37431), 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 05:30:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25622 states to 25622 states and 37431 transitions. [2021-11-03 05:30:54,152 INFO L78 Accepts]: Start accepts. Automaton has 25622 states and 37431 transitions. Word has length 113 [2021-11-03 05:30:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:30:54,152 INFO L470 AbstractCegarLoop]: Abstraction has 25622 states and 37431 transitions. [2021-11-03 05:30:54,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:30:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 25622 states and 37431 transitions. [2021-11-03 05:30:54,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 05:30:54,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:30:54,185 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:30:54,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:30:54,185 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:30:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:30:54,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1269907208, now seen corresponding path program 1 times [2021-11-03 05:30:54,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:30:54,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245098800] [2021-11-03 05:30:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:54,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:30:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:30:54,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:30:54,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245098800] [2021-11-03 05:30:54,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245098800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:30:54,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:30:54,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:30:54,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330802235] [2021-11-03 05:30:54,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:30:54,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:30:54,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:30:54,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:30:54,243 INFO L87 Difference]: Start difference. First operand 25622 states and 37431 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:30:55,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:30:55,993 INFO L93 Difference]: Finished difference Result 87260 states and 127043 transitions. [2021-11-03 05:30:55,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:30:55,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 113 [2021-11-03 05:30:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:30:56,185 INFO L225 Difference]: With dead ends: 87260 [2021-11-03 05:30:56,186 INFO L226 Difference]: Without dead ends: 61671 [2021-11-03 05:30:56,236 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 05:30:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61671 states. [2021-11-03 05:30:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61671 to 49045. [2021-11-03 05:30:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49045 states, 49044 states have (on average 1.4492292635184731) internal successors, (71076), 49044 states have internal predecessors, (71076), 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 05:30:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49045 states to 49045 states and 71076 transitions. [2021-11-03 05:30:58,640 INFO L78 Accepts]: Start accepts. Automaton has 49045 states and 71076 transitions. Word has length 113 [2021-11-03 05:30:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:30:58,640 INFO L470 AbstractCegarLoop]: Abstraction has 49045 states and 71076 transitions. [2021-11-03 05:30:58,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:30:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 49045 states and 71076 transitions. [2021-11-03 05:30:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 05:30:58,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:30:58,702 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:30:58,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:30:58,702 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:30:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:30:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash 43056856, now seen corresponding path program 1 times [2021-11-03 05:30:58,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:30:58,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706453261] [2021-11-03 05:30:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:58,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:30:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:30:58,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:30:58,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706453261] [2021-11-03 05:30:58,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706453261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:30:58,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:30:58,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:30:58,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926292930] [2021-11-03 05:30:58,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:30:58,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:30:58,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:30:58,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:30:58,798 INFO L87 Difference]: Start difference. First operand 49045 states and 71076 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:31:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:01,526 INFO L93 Difference]: Finished difference Result 166515 states and 240452 transitions. [2021-11-03 05:31:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:31:01,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 113 [2021-11-03 05:31:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:01,810 INFO L225 Difference]: With dead ends: 166515 [2021-11-03 05:31:01,810 INFO L226 Difference]: Without dead ends: 117510 [2021-11-03 05:31:01,871 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 05:31:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117510 states. [2021-11-03 05:31:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117510 to 93812. [2021-11-03 05:31:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93812 states, 93811 states have (on average 1.4374540299112044) internal successors, (134849), 93811 states have internal predecessors, (134849), 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 05:31:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93812 states to 93812 states and 134849 transitions. [2021-11-03 05:31:04,787 INFO L78 Accepts]: Start accepts. Automaton has 93812 states and 134849 transitions. Word has length 113 [2021-11-03 05:31:04,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:04,787 INFO L470 AbstractCegarLoop]: Abstraction has 93812 states and 134849 transitions. [2021-11-03 05:31:04,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:31:04,788 INFO L276 IsEmpty]: Start isEmpty. Operand 93812 states and 134849 transitions. [2021-11-03 05:31:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 05:31:04,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:04,911 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:31:04,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:31:04,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:31:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:04,912 INFO L85 PathProgramCache]: Analyzing trace with hash -951114568, now seen corresponding path program 1 times [2021-11-03 05:31:04,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:31:04,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103015233] [2021-11-03 05:31:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:04,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:31:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:31:04,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:31:04,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103015233] [2021-11-03 05:31:04,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103015233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:04,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:04,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:31:04,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719514301] [2021-11-03 05:31:04,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:31:04,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:31:04,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:31:04,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:04,999 INFO L87 Difference]: Start difference. First operand 93812 states and 134849 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:31:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:10,135 INFO L93 Difference]: Finished difference Result 317338 states and 454437 transitions. [2021-11-03 05:31:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:31:10,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 113 [2021-11-03 05:31:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:10,666 INFO L225 Difference]: With dead ends: 317338 [2021-11-03 05:31:10,666 INFO L226 Difference]: Without dead ends: 223573 [2021-11-03 05:31:10,865 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 05:31:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223573 states. [2021-11-03 05:31:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223573 to 179251. [2021-11-03 05:31:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179251 states, 179250 states have (on average 1.4256624825662483) internal successors, (255550), 179250 states have internal predecessors, (255550), 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 05:31:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179251 states to 179251 states and 255550 transitions. [2021-11-03 05:31:16,155 INFO L78 Accepts]: Start accepts. Automaton has 179251 states and 255550 transitions. Word has length 113 [2021-11-03 05:31:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:16,155 INFO L470 AbstractCegarLoop]: Abstraction has 179251 states and 255550 transitions. [2021-11-03 05:31:16,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 05:31:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 179251 states and 255550 transitions. [2021-11-03 05:31:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 05:31:16,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:16,282 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:31:16,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:31:16,282 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:31:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1180873465, now seen corresponding path program 1 times [2021-11-03 05:31:16,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:31:16,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890216528] [2021-11-03 05:31:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:16,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:31:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:16,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:31:16,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890216528] [2021-11-03 05:31:16,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890216528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:16,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:16,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:31:16,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605563189] [2021-11-03 05:31:16,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:31:16,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:31:16,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:31:16,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:16,361 INFO L87 Difference]: Start difference. First operand 179251 states and 255550 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 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 05:31:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:25,809 INFO L93 Difference]: Finished difference Result 615387 states and 873580 transitions. [2021-11-03 05:31:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:31:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 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 113 [2021-11-03 05:31:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:26,946 INFO L225 Difference]: With dead ends: 615387 [2021-11-03 05:31:26,946 INFO L226 Difference]: Without dead ends: 436148 [2021-11-03 05:31:27,151 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 05:31:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436148 states.