./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.13.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/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_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/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_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/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 ce60c7436d38d32c7688463931497518a4f865ab0e6bd5fc650dfa202a16aed5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:20:08,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:20:08,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:20:08,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:20:08,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:20:08,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:20:08,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:20:08,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:20:08,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:20:08,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:20:08,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:20:08,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:20:08,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:20:08,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:20:08,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:20:08,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:20:08,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:20:08,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:20:08,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:20:08,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:20:08,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:20:08,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:20:08,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:20:08,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:20:08,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:20:08,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:20:08,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:20:08,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:20:08,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:20:08,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:20:08,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:20:08,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:20:08,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:20:08,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:20:08,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:20:08,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:20:08,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:20:08,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:20:08,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:20:08,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:20:08,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:20:08,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:20:08,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:20:08,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:20:08,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:20:08,924 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:20:08,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:20:08,925 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:20:08,925 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:20:08,925 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:20:08,925 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:20:08,926 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:20:08,926 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:20:08,926 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:20:08,926 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:20:08,927 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:20:08,927 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:20:08,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:20:08,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:20:08,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:20:08,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:20:08,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:20:08,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:20:08,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:20:08,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:20:08,930 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:20:08,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:20:08,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:20:08,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:20:08,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:20:08,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:20:08,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:20:08,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:20:08,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:20:08,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:20:08,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:20:08,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:20:08,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:20:08,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:20:08,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:20:08,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:20:08,934 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_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce60c7436d38d32c7688463931497518a4f865ab0e6bd5fc650dfa202a16aed5 [2021-11-03 04:20:09,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:20:09,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:20:09,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:20:09,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:20:09,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:20:09,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/systemc/transmitter.13.cil.c [2021-11-03 04:20:09,387 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/data/7209b11f6/81ff285465ab4b3c9045e7a508d6c01b/FLAG64395e5a7 [2021-11-03 04:20:09,969 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:20:09,970 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/sv-benchmarks/c/systemc/transmitter.13.cil.c [2021-11-03 04:20:09,991 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/data/7209b11f6/81ff285465ab4b3c9045e7a508d6c01b/FLAG64395e5a7 [2021-11-03 04:20:10,253 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/data/7209b11f6/81ff285465ab4b3c9045e7a508d6c01b [2021-11-03 04:20:10,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:20:10,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:20:10,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:20:10,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:20:10,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:20:10,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:10,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523b29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10, skipping insertion in model container [2021-11-03 04:20:10,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:10,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:20:10,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:20:10,529 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_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/sv-benchmarks/c/systemc/transmitter.13.cil.c[401,414] [2021-11-03 04:20:10,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:20:10,697 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:20:10,714 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_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/sv-benchmarks/c/systemc/transmitter.13.cil.c[401,414] [2021-11-03 04:20:10,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:20:10,866 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:20:10,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10 WrapperNode [2021-11-03 04:20:10,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:20:10,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:20:10,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:20:10,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:20:10,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:10,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:11,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:20:11,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:20:11,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:20:11,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:20:11,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:11,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:11,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:11,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:11,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:11,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:11,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:11,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:20:11,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:20:11,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:20:11,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:20:11,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (1/1) ... [2021-11-03 04:20:11,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:20:11,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:20:11,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:20:11,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7cc8c8e-c2ab-459e-a7b1-9b5722bc5a61/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:20:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:20:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:20:11,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:20:11,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:20:19,527 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:20:19,528 INFO L299 CfgBuilder]: Removed 589 assume(true) statements. [2021-11-03 04:20:19,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:20:19 BoogieIcfgContainer [2021-11-03 04:20:19,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:20:19,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:20:19,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:20:19,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:20:19,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:20:10" (1/3) ... [2021-11-03 04:20:19,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494aeee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:20:19, skipping insertion in model container [2021-11-03 04:20:19,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:20:10" (2/3) ... [2021-11-03 04:20:19,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494aeee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:20:19, skipping insertion in model container [2021-11-03 04:20:19,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:20:19" (3/3) ... [2021-11-03 04:20:19,544 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.13.cil.c [2021-11-03 04:20:19,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:20:19,551 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:20:19,616 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:20:19,623 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:20:19,624 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:20:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 979 states, 977 states have (on average 1.5240532241555782) internal successors, (1489), 978 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:20:19,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:19,684 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:19,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1260825567, now seen corresponding path program 1 times [2021-11-03 04:20:19,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:19,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573622553] [2021-11-03 04:20:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:19,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:20,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:20,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573622553] [2021-11-03 04:20:20,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573622553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:20,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:20,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:20:20,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811682154] [2021-11-03 04:20:20,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:20:20,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:20:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:20:20,120 INFO L87 Difference]: Start difference. First operand has 979 states, 977 states have (on average 1.5240532241555782) internal successors, (1489), 978 states have internal predecessors, (1489), 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 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:20,390 INFO L93 Difference]: Finished difference Result 2861 states and 4345 transitions. [2021-11-03 04:20:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:20:20,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 64 [2021-11-03 04:20:20,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:20,417 INFO L225 Difference]: With dead ends: 2861 [2021-11-03 04:20:20,418 INFO L226 Difference]: Without dead ends: 1880 [2021-11-03 04:20:20,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:20:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-11-03 04:20:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1823. [2021-11-03 04:20:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1822 states have (on average 1.5071350164654227) internal successors, (2746), 1822 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2746 transitions. [2021-11-03 04:20:20,600 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2746 transitions. Word has length 64 [2021-11-03 04:20:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:20,601 INFO L470 AbstractCegarLoop]: Abstraction has 1823 states and 2746 transitions. [2021-11-03 04:20:20,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:20,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2746 transitions. [2021-11-03 04:20:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:20:20,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:20,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:20,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:20:20,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:20,609 INFO L85 PathProgramCache]: Analyzing trace with hash -683896926, now seen corresponding path program 1 times [2021-11-03 04:20:20,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:20,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728226359] [2021-11-03 04:20:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:20,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:20,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:20,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728226359] [2021-11-03 04:20:20,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728226359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:20,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:20,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:20:20,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178268028] [2021-11-03 04:20:20,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:20:20,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:20:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:20:20,776 INFO L87 Difference]: Start difference. First operand 1823 states and 2746 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:21,216 INFO L93 Difference]: Finished difference Result 6204 states and 9317 transitions. [2021-11-03 04:20:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:20:21,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-03 04:20:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:21,248 INFO L225 Difference]: With dead ends: 6204 [2021-11-03 04:20:21,248 INFO L226 Difference]: Without dead ends: 4386 [2021-11-03 04:20:21,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-11-03 04:20:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3447. [2021-11-03 04:20:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 1.4962275101567035) internal successors, (5156), 3446 states have internal predecessors, (5156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 5156 transitions. [2021-11-03 04:20:21,411 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 5156 transitions. Word has length 64 [2021-11-03 04:20:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:21,412 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 5156 transitions. [2021-11-03 04:20:21,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 5156 transitions. [2021-11-03 04:20:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:20:21,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:21,425 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:21,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:20:21,426 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1704586177, now seen corresponding path program 1 times [2021-11-03 04:20:21,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:21,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945230980] [2021-11-03 04:20:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:21,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:21,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:21,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945230980] [2021-11-03 04:20:21,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945230980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:21,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:21,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:20:21,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35653381] [2021-11-03 04:20:21,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:20:21,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:20:21,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:20:21,553 INFO L87 Difference]: Start difference. First operand 3447 states and 5156 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:22,078 INFO L93 Difference]: Finished difference Result 11769 states and 17551 transitions. [2021-11-03 04:20:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:20:22,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-03 04:20:22,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:22,131 INFO L225 Difference]: With dead ends: 11769 [2021-11-03 04:20:22,132 INFO L226 Difference]: Without dead ends: 8334 [2021-11-03 04:20:22,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8334 states. [2021-11-03 04:20:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8334 to 6560. [2021-11-03 04:20:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6560 states, 6559 states have (on average 1.4851349291050464) internal successors, (9741), 6559 states have internal predecessors, (9741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 9741 transitions. [2021-11-03 04:20:22,422 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 9741 transitions. Word has length 64 [2021-11-03 04:20:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:22,423 INFO L470 AbstractCegarLoop]: Abstraction has 6560 states and 9741 transitions. [2021-11-03 04:20:22,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 9741 transitions. [2021-11-03 04:20:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:20:22,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:22,426 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:22,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:20:22,427 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:22,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:22,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1807387424, now seen corresponding path program 1 times [2021-11-03 04:20:22,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:22,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38389794] [2021-11-03 04:20:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:22,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:22,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:22,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38389794] [2021-11-03 04:20:22,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38389794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:22,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:22,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:20:22,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435925418] [2021-11-03 04:20:22,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:20:22,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:22,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:20:22,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:20:22,504 INFO L87 Difference]: Start difference. First operand 6560 states and 9741 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:23,351 INFO L93 Difference]: Finished difference Result 22406 states and 33168 transitions. [2021-11-03 04:20:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:20:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-03 04:20:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:23,436 INFO L225 Difference]: With dead ends: 22406 [2021-11-03 04:20:23,436 INFO L226 Difference]: Without dead ends: 15865 [2021-11-03 04:20:23,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15865 states. [2021-11-03 04:20:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15865 to 12519. [2021-11-03 04:20:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12519 states, 12518 states have (on average 1.473877616232625) internal successors, (18450), 12518 states have internal predecessors, (18450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12519 states to 12519 states and 18450 transitions. [2021-11-03 04:20:23,979 INFO L78 Accepts]: Start accepts. Automaton has 12519 states and 18450 transitions. Word has length 64 [2021-11-03 04:20:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:23,979 INFO L470 AbstractCegarLoop]: Abstraction has 12519 states and 18450 transitions. [2021-11-03 04:20:23,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 12519 states and 18450 transitions. [2021-11-03 04:20:23,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:20:23,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:23,983 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:23,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:20:23,984 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1054745153, now seen corresponding path program 1 times [2021-11-03 04:20:23,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:23,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881689767] [2021-11-03 04:20:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:23,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:24,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:24,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881689767] [2021-11-03 04:20:24,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881689767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:24,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:24,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:20:24,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588392574] [2021-11-03 04:20:24,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:20:24,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:24,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:20:24,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:20:24,063 INFO L87 Difference]: Start difference. First operand 12519 states and 18450 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:25,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:25,287 INFO L93 Difference]: Finished difference Result 42699 states and 62727 transitions. [2021-11-03 04:20:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:20:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-03 04:20:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:25,383 INFO L225 Difference]: With dead ends: 42699 [2021-11-03 04:20:25,383 INFO L226 Difference]: Without dead ends: 30206 [2021-11-03 04:20:25,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:25,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30206 states. [2021-11-03 04:20:26,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30206 to 23910. [2021-11-03 04:20:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23910 states, 23909 states have (on average 1.4625036597097327) internal successors, (34967), 23909 states have internal predecessors, (34967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23910 states to 23910 states and 34967 transitions. [2021-11-03 04:20:26,443 INFO L78 Accepts]: Start accepts. Automaton has 23910 states and 34967 transitions. Word has length 64 [2021-11-03 04:20:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:26,444 INFO L470 AbstractCegarLoop]: Abstraction has 23910 states and 34967 transitions. [2021-11-03 04:20:26,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 23910 states and 34967 transitions. [2021-11-03 04:20:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:20:26,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:26,447 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:26,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:20:26,448 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:26,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1084707742, now seen corresponding path program 1 times [2021-11-03 04:20:26,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:26,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187408110] [2021-11-03 04:20:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:26,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:26,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:26,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187408110] [2021-11-03 04:20:26,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187408110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:26,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:26,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:20:26,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800321856] [2021-11-03 04:20:26,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:20:26,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:26,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:20:26,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:20:26,584 INFO L87 Difference]: Start difference. First operand 23910 states and 34967 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:28,403 INFO L93 Difference]: Finished difference Result 81342 states and 118564 transitions. [2021-11-03 04:20:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:20:28,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-03 04:20:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:28,565 INFO L225 Difference]: With dead ends: 81342 [2021-11-03 04:20:28,566 INFO L226 Difference]: Without dead ends: 57465 [2021-11-03 04:20:28,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57465 states. [2021-11-03 04:20:30,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57465 to 45653. [2021-11-03 04:20:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45653 states, 45652 states have (on average 1.4510645754840972) internal successors, (66244), 45652 states have internal predecessors, (66244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45653 states to 45653 states and 66244 transitions. [2021-11-03 04:20:30,330 INFO L78 Accepts]: Start accepts. Automaton has 45653 states and 66244 transitions. Word has length 64 [2021-11-03 04:20:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:30,330 INFO L470 AbstractCegarLoop]: Abstraction has 45653 states and 66244 transitions. [2021-11-03 04:20:30,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 45653 states and 66244 transitions. [2021-11-03 04:20:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:20:30,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:30,334 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:30,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:20:30,335 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash -680108867, now seen corresponding path program 1 times [2021-11-03 04:20:30,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:30,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381617808] [2021-11-03 04:20:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:30,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:30,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:30,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381617808] [2021-11-03 04:20:30,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381617808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:30,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:30,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:20:30,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391868982] [2021-11-03 04:20:30,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:20:30,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:20:30,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:20:30,451 INFO L87 Difference]: Start difference. First operand 45653 states and 66244 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:33,787 INFO L93 Difference]: Finished difference Result 155049 states and 224219 transitions. [2021-11-03 04:20:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:20:33,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-03 04:20:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:34,062 INFO L225 Difference]: With dead ends: 155049 [2021-11-03 04:20:34,062 INFO L226 Difference]: Without dead ends: 109432 [2021-11-03 04:20:34,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109432 states. [2021-11-03 04:20:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109432 to 87092. [2021-11-03 04:20:37,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87092 states, 87091 states have (on average 1.4396091444580956) internal successors, (125377), 87091 states have internal predecessors, (125377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87092 states to 87092 states and 125377 transitions. [2021-11-03 04:20:37,246 INFO L78 Accepts]: Start accepts. Automaton has 87092 states and 125377 transitions. Word has length 64 [2021-11-03 04:20:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:37,247 INFO L470 AbstractCegarLoop]: Abstraction has 87092 states and 125377 transitions. [2021-11-03 04:20:37,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 87092 states and 125377 transitions. [2021-11-03 04:20:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:20:37,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:37,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:37,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:20:37,251 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:37,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2038300670, now seen corresponding path program 1 times [2021-11-03 04:20:37,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:37,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617560852] [2021-11-03 04:20:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:37,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:37,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:37,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617560852] [2021-11-03 04:20:37,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617560852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:37,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:37,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:20:37,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330513605] [2021-11-03 04:20:37,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:20:37,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:20:37,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:20:37,348 INFO L87 Difference]: Start difference. First operand 87092 states and 125377 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:42,075 INFO L93 Difference]: Finished difference Result 294624 states and 422636 transitions. [2021-11-03 04:20:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:20:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-03 04:20:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:42,465 INFO L225 Difference]: With dead ends: 294624 [2021-11-03 04:20:42,465 INFO L226 Difference]: Without dead ends: 207575 [2021-11-03 04:20:42,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:20:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207575 states. [2021-11-03 04:20:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207575 to 165939. [2021-11-03 04:20:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165939 states, 165938 states have (on average 1.4281840205377911) internal successors, (236990), 165938 states have internal predecessors, (236990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165939 states to 165939 states and 236990 transitions. [2021-11-03 04:20:48,178 INFO L78 Accepts]: Start accepts. Automaton has 165939 states and 236990 transitions. Word has length 64 [2021-11-03 04:20:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:48,178 INFO L470 AbstractCegarLoop]: Abstraction has 165939 states and 236990 transitions. [2021-11-03 04:20:48,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:48,179 INFO L276 IsEmpty]: Start isEmpty. Operand 165939 states and 236990 transitions. [2021-11-03 04:20:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:20:48,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:48,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:20:48,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:20:48,182 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash 365783039, now seen corresponding path program 1 times [2021-11-03 04:20:48,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:48,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991155087] [2021-11-03 04:20:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:48,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:48,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:48,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991155087] [2021-11-03 04:20:48,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991155087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:48,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:48,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:20:48,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767620625] [2021-11-03 04:20:48,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:20:48,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:20:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:20:48,262 INFO L87 Difference]: Start difference. First operand 165939 states and 236990 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:58,653 INFO L93 Difference]: Finished difference Result 588089 states and 842049 transitions. [2021-11-03 04:20:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:20:58,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-03 04:20:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:59,907 INFO L225 Difference]: With dead ends: 588089 [2021-11-03 04:20:59,908 INFO L226 Difference]: Without dead ends: 422199 [2021-11-03 04:21:00,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:21:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422199 states.