./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.12.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7 --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 062c7418109a213aa13d25a99437d8241cca4f6492c123259890838dc94aff90 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:14:47,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:14:47,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:14:47,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:14:47,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:14:47,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:14:47,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:14:47,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:14:47,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:14:47,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:14:47,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:14:47,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:14:47,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:14:47,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:14:47,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:14:47,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:14:47,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:14:47,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:14:47,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:14:47,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:14:47,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:14:47,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:14:47,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:14:47,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:14:47,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:14:47,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:14:47,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:14:47,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:14:47,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:14:47,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:14:47,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:14:47,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:14:47,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:14:47,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:14:47,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:14:47,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:14:47,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:14:47,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:14:47,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:14:47,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:14:47,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:14:47,871 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:14:47,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:14:47,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:14:47,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:14:47,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:14:47,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:14:47,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:14:47,898 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:14:47,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:14:47,899 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:14:47,899 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:14:47,899 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:14:47,899 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:14:47,900 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:14:47,900 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:14:47,900 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:14:47,900 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:14:47,900 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:14:47,901 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:14:47,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:14:47,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:14:47,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:14:47,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:14:47,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:14:47,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:14:47,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:14:47,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:14:47,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:14:47,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:14:47,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:14:47,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:14:47,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:14:47,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:14:47,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:14:47,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:14:47,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:14:47,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:14:47,905 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:14:47,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:14:47,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:14:47,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:14:47,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:14:47,906 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_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 062c7418109a213aa13d25a99437d8241cca4f6492c123259890838dc94aff90 [2021-11-25 18:14:48,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:14:48,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:14:48,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:14:48,217 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:14:48,218 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:14:48,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/systemc/transmitter.12.cil.c [2021-11-25 18:14:48,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/data/eeb331229/57f0369dd54d41028f3a0d888dc6dc12/FLAGb29664eff [2021-11-25 18:14:48,869 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:14:48,869 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/sv-benchmarks/c/systemc/transmitter.12.cil.c [2021-11-25 18:14:48,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/data/eeb331229/57f0369dd54d41028f3a0d888dc6dc12/FLAGb29664eff [2021-11-25 18:14:49,145 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/data/eeb331229/57f0369dd54d41028f3a0d888dc6dc12 [2021-11-25 18:14:49,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:14:49,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:14:49,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:14:49,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:14:49,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:14:49,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388680c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49, skipping insertion in model container [2021-11-25 18:14:49,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:14:49,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:14:49,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/sv-benchmarks/c/systemc/transmitter.12.cil.c[706,719] [2021-11-25 18:14:49,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:14:49,567 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:14:49,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/sv-benchmarks/c/systemc/transmitter.12.cil.c[706,719] [2021-11-25 18:14:49,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:14:49,749 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:14:49,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49 WrapperNode [2021-11-25 18:14:49,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:14:49,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:14:49,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:14:49,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:14:49,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,839 INFO L137 Inliner]: procedures = 52, calls = 66, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 834 [2021-11-25 18:14:49,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:14:49,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:14:49,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:14:49,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:14:49,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:14:49,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:14:49,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:14:49,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:14:49,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (1/1) ... [2021-11-25 18:14:49,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:14:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:14:49,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:14:50,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5313647d-b274-4af1-b8a1-528e6200d10e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:14:50,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:14:50,057 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 18:14:50,057 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 18:14:50,057 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 18:14:50,057 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 18:14:50,058 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 18:14:50,058 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 18:14:50,058 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 18:14:50,058 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 18:14:50,058 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 18:14:50,058 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 18:14:50,059 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 18:14:50,059 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 18:14:50,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:14:50,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:14:50,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:14:50,244 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:14:50,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:14:51,203 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:14:51,701 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:14:51,702 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-25 18:14:51,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:14:51 BoogieIcfgContainer [2021-11-25 18:14:51,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:14:51,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:14:51,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:14:51,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:14:51,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:14:49" (1/3) ... [2021-11-25 18:14:51,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e43403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:14:51, skipping insertion in model container [2021-11-25 18:14:51,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49" (2/3) ... [2021-11-25 18:14:51,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e43403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:14:51, skipping insertion in model container [2021-11-25 18:14:51,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:14:51" (3/3) ... [2021-11-25 18:14:51,716 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.12.cil.c [2021-11-25 18:14:51,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:14:51,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:14:51,798 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:14:51,808 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 [2021-11-25 18:14:51,808 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:14:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 155 states have internal predecessors, (239), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:14:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:14:51,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:51,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:51,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:51,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:51,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2024217964, now seen corresponding path program 1 times [2021-11-25 18:14:51,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:51,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376632778] [2021-11-25 18:14:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:51,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:14:52,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:52,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376632778] [2021-11-25 18:14:52,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376632778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:52,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:52,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:14:52,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681955172] [2021-11-25 18:14:52,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:52,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:14:52,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:52,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:14:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:14:52,343 INFO L87 Difference]: Start difference. First operand has 186 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 155 states have internal predecessors, (239), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:14:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:52,904 INFO L93 Difference]: Finished difference Result 545 states and 862 transitions. [2021-11-25 18:14:52,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:14:52,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-25 18:14:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:52,924 INFO L225 Difference]: With dead ends: 545 [2021-11-25 18:14:52,925 INFO L226 Difference]: Without dead ends: 360 [2021-11-25 18:14:52,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:14:52,936 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 507 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:52,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 802 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:14:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-25 18:14:53,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 356. [2021-11-25 18:14:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 297 states have (on average 1.5252525252525253) internal successors, (453), 299 states have internal predecessors, (453), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-25 18:14:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 545 transitions. [2021-11-25 18:14:53,034 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 545 transitions. Word has length 77 [2021-11-25 18:14:53,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:53,035 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 545 transitions. [2021-11-25 18:14:53,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:14:53,036 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 545 transitions. [2021-11-25 18:14:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:14:53,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:53,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:53,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:14:53,042 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash -133255059, now seen corresponding path program 1 times [2021-11-25 18:14:53,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:53,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463325700] [2021-11-25 18:14:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:53,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:14:53,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:53,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463325700] [2021-11-25 18:14:53,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463325700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:53,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:53,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:14:53,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077963712] [2021-11-25 18:14:53,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:53,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:14:53,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:14:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:14:53,233 INFO L87 Difference]: Start difference. First operand 356 states and 545 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:14:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:54,328 INFO L93 Difference]: Finished difference Result 2077 states and 3363 transitions. [2021-11-25 18:14:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:14:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-25 18:14:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:54,362 INFO L225 Difference]: With dead ends: 2077 [2021-11-25 18:14:54,362 INFO L226 Difference]: Without dead ends: 1726 [2021-11-25 18:14:54,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:14:54,374 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 1199 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:54,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1226 Valid, 1295 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:14:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-11-25 18:14:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1690. [2021-11-25 18:14:54,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1427 states have (on average 1.5227750525578136) internal successors, (2173), 1435 states have internal predecessors, (2173), 202 states have call successors, (202), 60 states have call predecessors, (202), 60 states have return successors, (316), 195 states have call predecessors, (316), 202 states have call successors, (316) [2021-11-25 18:14:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2691 transitions. [2021-11-25 18:14:54,601 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2691 transitions. Word has length 77 [2021-11-25 18:14:54,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:54,603 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2691 transitions. [2021-11-25 18:14:54,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:14:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2691 transitions. [2021-11-25 18:14:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:14:54,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:54,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:54,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:14:54,612 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash 895277102, now seen corresponding path program 1 times [2021-11-25 18:14:54,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:54,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800593164] [2021-11-25 18:14:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:54,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:14:54,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:54,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800593164] [2021-11-25 18:14:54,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800593164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:54,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:54,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:14:54,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173111301] [2021-11-25 18:14:54,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:54,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:14:54,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:14:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:14:54,785 INFO L87 Difference]: Start difference. First operand 1690 states and 2691 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:14:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:55,863 INFO L93 Difference]: Finished difference Result 6683 states and 10977 transitions. [2021-11-25 18:14:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:14:55,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-25 18:14:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:55,925 INFO L225 Difference]: With dead ends: 6683 [2021-11-25 18:14:55,925 INFO L226 Difference]: Without dead ends: 4998 [2021-11-25 18:14:55,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:14:55,939 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 1203 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:55,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 1319 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:14:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2021-11-25 18:14:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 4704. [2021-11-25 18:14:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4075 states have (on average 1.5334969325153374) internal successors, (6249), 4017 states have internal predecessors, (6249), 464 states have call successors, (464), 148 states have call predecessors, (464), 164 states have return successors, (958), 539 states have call predecessors, (958), 464 states have call successors, (958) [2021-11-25 18:14:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 7671 transitions. [2021-11-25 18:14:56,327 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 7671 transitions. Word has length 77 [2021-11-25 18:14:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:56,327 INFO L470 AbstractCegarLoop]: Abstraction has 4704 states and 7671 transitions. [2021-11-25 18:14:56,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:14:56,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 7671 transitions. [2021-11-25 18:14:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:14:56,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:56,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:56,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:14:56,331 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:56,331 INFO L85 PathProgramCache]: Analyzing trace with hash -246370291, now seen corresponding path program 1 times [2021-11-25 18:14:56,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:56,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964538714] [2021-11-25 18:14:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:56,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:14:56,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:56,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964538714] [2021-11-25 18:14:56,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964538714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:56,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:56,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:14:56,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585142269] [2021-11-25 18:14:56,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:56,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:14:56,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:56,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:14:56,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:14:56,439 INFO L87 Difference]: Start difference. First operand 4704 states and 7671 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:14:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:57,951 INFO L93 Difference]: Finished difference Result 17415 states and 29463 transitions. [2021-11-25 18:14:57,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:14:57,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-25 18:14:57,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:58,081 INFO L225 Difference]: With dead ends: 17415 [2021-11-25 18:14:58,082 INFO L226 Difference]: Without dead ends: 12716 [2021-11-25 18:14:58,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:14:58,112 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 1198 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:58,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 1305 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:14:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-11-25 18:14:58,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 12048. [2021-11-25 18:14:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12048 states, 10597 states have (on average 1.543172596017741) internal successors, (16353), 10317 states have internal predecessors, (16353), 1030 states have call successors, (1030), 348 states have call predecessors, (1030), 420 states have return successors, (2738), 1383 states have call predecessors, (2738), 1030 states have call successors, (2738) [2021-11-25 18:14:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12048 states to 12048 states and 20121 transitions. [2021-11-25 18:14:59,099 INFO L78 Accepts]: Start accepts. Automaton has 12048 states and 20121 transitions. Word has length 77 [2021-11-25 18:14:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:59,100 INFO L470 AbstractCegarLoop]: Abstraction has 12048 states and 20121 transitions. [2021-11-25 18:14:59,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:14:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 12048 states and 20121 transitions. [2021-11-25 18:14:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:14:59,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:59,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:59,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:14:59,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash -947938516, now seen corresponding path program 1 times [2021-11-25 18:14:59,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:59,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714858067] [2021-11-25 18:14:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:59,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:14:59,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:59,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714858067] [2021-11-25 18:14:59,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714858067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:59,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:59,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:14:59,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666428755] [2021-11-25 18:14:59,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:59,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:14:59,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:14:59,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:14:59,198 INFO L87 Difference]: Start difference. First operand 12048 states and 20121 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:15:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:01,399 INFO L93 Difference]: Finished difference Result 43847 states and 76605 transitions. [2021-11-25 18:15:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:15:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-25 18:15:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:01,699 INFO L225 Difference]: With dead ends: 43847 [2021-11-25 18:15:01,699 INFO L226 Difference]: Without dead ends: 31804 [2021-11-25 18:15:01,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:15:01,791 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 1193 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:01,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 1302 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:15:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31804 states. [2021-11-25 18:15:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31804 to 30384. [2021-11-25 18:15:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30384 states, 27015 states have (on average 1.5541365907828983) internal successors, (41985), 26037 states have internal predecessors, (41985), 2292 states have call successors, (2292), 820 states have call predecessors, (2292), 1076 states have return successors, (7766), 3527 states have call predecessors, (7766), 2292 states have call successors, (7766) [2021-11-25 18:15:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30384 states to 30384 states and 52043 transitions. [2021-11-25 18:15:04,274 INFO L78 Accepts]: Start accepts. Automaton has 30384 states and 52043 transitions. Word has length 77 [2021-11-25 18:15:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:04,275 INFO L470 AbstractCegarLoop]: Abstraction has 30384 states and 52043 transitions. [2021-11-25 18:15:04,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:15:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30384 states and 52043 transitions. [2021-11-25 18:15:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:15:04,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:04,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:04,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:15:04,286 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:04,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2039024011, now seen corresponding path program 1 times [2021-11-25 18:15:04,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:04,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139648608] [2021-11-25 18:15:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:04,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:15:04,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139648608] [2021-11-25 18:15:04,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139648608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:15:04,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:15:04,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:15:04,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588676108] [2021-11-25 18:15:04,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:15:04,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:15:04,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:04,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:15:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:15:04,536 INFO L87 Difference]: Start difference. First operand 30384 states and 52043 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:15:08,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:08,158 INFO L93 Difference]: Finished difference Result 110463 states and 199563 transitions. [2021-11-25 18:15:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:15:08,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-25 18:15:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:08,898 INFO L225 Difference]: With dead ends: 110463 [2021-11-25 18:15:08,898 INFO L226 Difference]: Without dead ends: 80084 [2021-11-25 18:15:09,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:15:09,014 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 1188 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:09,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1208 Valid, 1299 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:15:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80084 states. [2021-11-25 18:15:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80084 to 77140. [2021-11-25 18:15:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77140 states, 69101 states have (on average 1.56699613609065) internal successors, (108281), 66029 states have internal predecessors, (108281), 5218 states have call successors, (5218), 1980 states have call predecessors, (5218), 2820 states have return successors, (22146), 9131 states have call predecessors, (22146), 5218 states have call successors, (22146) [2021-11-25 18:15:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77140 states to 77140 states and 135645 transitions. [2021-11-25 18:15:14,501 INFO L78 Accepts]: Start accepts. Automaton has 77140 states and 135645 transitions. Word has length 77 [2021-11-25 18:15:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:14,503 INFO L470 AbstractCegarLoop]: Abstraction has 77140 states and 135645 transitions. [2021-11-25 18:15:14,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:15:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 77140 states and 135645 transitions. [2021-11-25 18:15:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:15:14,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:14,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:14,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:15:14,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:14,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1855952086, now seen corresponding path program 1 times [2021-11-25 18:15:14,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:14,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653068385] [2021-11-25 18:15:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:14,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:15:14,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:14,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653068385] [2021-11-25 18:15:14,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653068385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:15:14,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:15:14,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:15:14,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34020973] [2021-11-25 18:15:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:15:14,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:15:14,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:15:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:15:14,615 INFO L87 Difference]: Start difference. First operand 77140 states and 135645 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:15:19,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:19,729 INFO L93 Difference]: Finished difference Result 229999 states and 421184 transitions. [2021-11-25 18:15:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:15:19,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-25 18:15:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:20,755 INFO L225 Difference]: With dead ends: 229999 [2021-11-25 18:15:20,755 INFO L226 Difference]: Without dead ends: 152864 [2021-11-25 18:15:20,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:15:20,951 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 534 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:20,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 800 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:15:21,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152864 states. [2021-11-25 18:15:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152864 to 152252. [2021-11-25 18:15:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152252 states, 136369 states have (on average 1.5567247688257595) internal successors, (212289), 130644 states have internal predecessors, (212289), 10242 states have call successors, (10242), 3960 states have call predecessors, (10242), 5640 states have return successors, (42770), 17648 states have call predecessors, (42770), 10242 states have call successors, (42770) [2021-11-25 18:15:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152252 states to 152252 states and 265301 transitions. [2021-11-25 18:15:29,918 INFO L78 Accepts]: Start accepts. Automaton has 152252 states and 265301 transitions. Word has length 77 [2021-11-25 18:15:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:29,918 INFO L470 AbstractCegarLoop]: Abstraction has 152252 states and 265301 transitions. [2021-11-25 18:15:29,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:15:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 152252 states and 265301 transitions. [2021-11-25 18:15:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:15:29,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:29,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:29,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:15:29,923 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash 810364937, now seen corresponding path program 1 times [2021-11-25 18:15:29,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:29,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200432772] [2021-11-25 18:15:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:29,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:15:29,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200432772] [2021-11-25 18:15:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200432772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:15:29,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:15:29,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:15:29,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263079085] [2021-11-25 18:15:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:15:29,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:15:29,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:15:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:15:29,991 INFO L87 Difference]: Start difference. First operand 152252 states and 265301 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:15:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:40,760 INFO L93 Difference]: Finished difference Result 455523 states and 830571 transitions. [2021-11-25 18:15:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:15:40,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-11-25 18:15:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:42,993 INFO L225 Difference]: With dead ends: 455523 [2021-11-25 18:15:42,993 INFO L226 Difference]: Without dead ends: 303276