./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P --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 bed48b88780a9161d07013a5b96d251b4e7830e1504dd411292edd1687355823 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:50:24,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:50:24,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:50:24,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:50:24,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:50:24,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:50:24,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:50:24,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:50:24,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:50:24,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:50:24,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:50:24,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:50:24,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:50:24,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:50:24,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:50:24,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:50:24,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:50:24,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:50:24,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:50:24,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:50:24,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:50:24,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:50:24,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:50:24,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:50:24,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:50:24,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:50:24,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:50:24,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:50:24,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:50:24,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:50:24,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:50:24,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:50:24,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:50:24,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:50:24,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:50:24,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:50:24,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:50:24,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:50:24,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:50:24,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:50:24,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:50:24,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:50:24,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:50:24,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:50:24,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:50:24,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:50:24,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:50:24,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:50:24,907 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:50:24,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:50:24,907 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:50:24,908 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:50:24,908 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:50:24,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:50:24,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:50:24,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:50:24,909 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:50:24,909 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:50:24,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:50:24,909 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:50:24,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:50:24,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:50:24,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:50:24,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:50:24,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:50:24,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:50:24,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:50:24,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:50:24,912 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:50:24,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:50:24,912 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:50:24,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:50:24,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:50:24,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:50:24,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:24,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:50:24,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:50:24,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:50:24,914 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:50:24,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:50:24,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:50:24,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:50:24,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:50:24,915 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_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bed48b88780a9161d07013a5b96d251b4e7830e1504dd411292edd1687355823 [2021-11-20 22:50:25,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:50:25,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:50:25,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:50:25,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:50:25,184 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:50:25,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2021-11-20 22:50:25,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/data/0725a822d/749471539f094cabbb888b6ffd2582e3/FLAG961ca9349 [2021-11-20 22:50:25,900 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:50:25,900 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2021-11-20 22:50:25,919 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/data/0725a822d/749471539f094cabbb888b6ffd2582e3/FLAG961ca9349 [2021-11-20 22:50:26,191 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/data/0725a822d/749471539f094cabbb888b6ffd2582e3 [2021-11-20 22:50:26,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:50:26,195 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:50:26,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:26,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:50:26,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:50:26,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3634d7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26, skipping insertion in model container [2021-11-20 22:50:26,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:50:26,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:50:26,638 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_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c[28194,28207] [2021-11-20 22:50:26,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:26,650 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:50:26,743 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_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c[28194,28207] [2021-11-20 22:50:26,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:26,759 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:50:26,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26 WrapperNode [2021-11-20 22:50:26,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:26,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:26,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:50:26,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:50:26,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,860 INFO L137 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 951 [2021-11-20 22:50:26,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:26,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:50:26,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:50:26,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:50:26,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:50:26,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:50:26,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:50:26,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:50:26,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (1/1) ... [2021-11-20 22:50:26,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:26,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:27,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:50:27,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:50:27,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:50:27,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:50:27,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:50:27,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:50:27,227 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:50:27,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:50:28,234 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:50:29,127 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:50:29,128 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 22:50:29,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:29 BoogieIcfgContainer [2021-11-20 22:50:29,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:50:29,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:50:29,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:50:29,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:50:29,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:26" (1/3) ... [2021-11-20 22:50:29,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f056a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:29, skipping insertion in model container [2021-11-20 22:50:29,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:26" (2/3) ... [2021-11-20 22:50:29,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f056a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:29, skipping insertion in model container [2021-11-20 22:50:29,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:29" (3/3) ... [2021-11-20 22:50:29,141 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2021-11-20 22:50:29,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:50:29,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:50:29,202 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:50:29,209 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 [2021-11-20 22:50:29,209 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:50:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) [2021-11-20 22:50:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 22:50:29,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:29,236 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] [2021-11-20 22:50:29,237 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1358794612, now seen corresponding path program 1 times [2021-11-20 22:50:29,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:29,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006316675] [2021-11-20 22:50:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:29,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:30,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006316675] [2021-11-20 22:50:30,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006316675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:30,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:30,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:50:30,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933296229] [2021-11-20 22:50:30,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:30,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:30,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:30,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:30,093 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-20 22:50:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:30,410 INFO L93 Difference]: Finished difference Result 180 states and 288 transitions. [2021-11-20 22:50:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:30,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-11-20 22:50:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:30,424 INFO L225 Difference]: With dead ends: 180 [2021-11-20 22:50:30,430 INFO L226 Difference]: Without dead ends: 158 [2021-11-20 22:50:30,433 INFO L932 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 [2021-11-20 22:50:30,437 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 29 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:30,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 372 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:50:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-20 22:50:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2021-11-20 22:50:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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) [2021-11-20 22:50:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2021-11-20 22:50:30,487 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2021-11-20 22:50:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:30,488 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2021-11-20 22:50:30,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-20 22:50:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2021-11-20 22:50:30,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 22:50:30,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:30,492 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] [2021-11-20 22:50:30,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:50:30,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:30,493 INFO L85 PathProgramCache]: Analyzing trace with hash -895185953, now seen corresponding path program 1 times [2021-11-20 22:50:30,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:30,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075661312] [2021-11-20 22:50:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:30,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:30,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:30,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075661312] [2021-11-20 22:50:30,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075661312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:30,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:30,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:50:30,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160308190] [2021-11-20 22:50:30,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:30,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:30,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:30,737 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-20 22:50:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:30,886 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2021-11-20 22:50:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:30,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2021-11-20 22:50:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:30,889 INFO L225 Difference]: With dead ends: 180 [2021-11-20 22:50:30,890 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 22:50:30,890 INFO L932 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 [2021-11-20 22:50:30,892 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:30,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 385 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 22:50:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-20 22:50:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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) [2021-11-20 22:50:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2021-11-20 22:50:30,925 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2021-11-20 22:50:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:30,928 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2021-11-20 22:50:30,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-20 22:50:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2021-11-20 22:50:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 22:50:30,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:30,933 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] [2021-11-20 22:50:30,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:50:30,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2043654979, now seen corresponding path program 1 times [2021-11-20 22:50:30,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:30,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208697253] [2021-11-20 22:50:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:30,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:31,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:31,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208697253] [2021-11-20 22:50:31,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208697253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:31,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:31,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:50:31,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971459014] [2021-11-20 22:50:31,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:31,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:31,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:31,158 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:31,345 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2021-11-20 22:50:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 22:50:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:31,348 INFO L225 Difference]: With dead ends: 180 [2021-11-20 22:50:31,348 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 22:50:31,349 INFO L932 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 [2021-11-20 22:50:31,350 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:31,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:50:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 22:50:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-20 22:50:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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) [2021-11-20 22:50:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2021-11-20 22:50:31,372 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2021-11-20 22:50:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:31,372 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2021-11-20 22:50:31,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2021-11-20 22:50:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 22:50:31,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:31,381 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] [2021-11-20 22:50:31,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:50:31,382 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:31,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:31,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1013962632, now seen corresponding path program 1 times [2021-11-20 22:50:31,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:31,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927272863] [2021-11-20 22:50:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:31,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:31,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:31,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927272863] [2021-11-20 22:50:31,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927272863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:31,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:31,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:50:31,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613990635] [2021-11-20 22:50:31,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:31,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:31,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:31,639 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:31,789 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2021-11-20 22:50:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 22:50:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:31,797 INFO L225 Difference]: With dead ends: 180 [2021-11-20 22:50:31,797 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 22:50:31,798 INFO L932 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 [2021-11-20 22:50:31,801 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:31,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 383 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 22:50:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-20 22:50:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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) [2021-11-20 22:50:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2021-11-20 22:50:31,822 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2021-11-20 22:50:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:31,825 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2021-11-20 22:50:31,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2021-11-20 22:50:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 22:50:31,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:31,829 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] [2021-11-20 22:50:31,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:50:31,829 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1316279814, now seen corresponding path program 1 times [2021-11-20 22:50:31,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:31,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297818293] [2021-11-20 22:50:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:31,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:32,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:32,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297818293] [2021-11-20 22:50:32,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297818293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:32,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:32,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:50:32,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340705004] [2021-11-20 22:50:32,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:32,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:32,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:32,011 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-20 22:50:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:32,166 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2021-11-20 22:50:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:32,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-20 22:50:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:32,169 INFO L225 Difference]: With dead ends: 180 [2021-11-20 22:50:32,169 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 22:50:32,169 INFO L932 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 [2021-11-20 22:50:32,171 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:32,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 22:50:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-20 22:50:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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) [2021-11-20 22:50:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2021-11-20 22:50:32,180 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2021-11-20 22:50:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:32,181 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2021-11-20 22:50:32,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-20 22:50:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2021-11-20 22:50:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 22:50:32,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:32,183 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] [2021-11-20 22:50:32,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:50:32,183 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:32,184 INFO L85 PathProgramCache]: Analyzing trace with hash 749057902, now seen corresponding path program 1 times [2021-11-20 22:50:32,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:32,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795776070] [2021-11-20 22:50:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:32,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:32,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:32,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795776070] [2021-11-20 22:50:32,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795776070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:32,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:32,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:50:32,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759117923] [2021-11-20 22:50:32,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:32,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:32,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:32,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:32,817 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-20 22:50:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:32,987 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2021-11-20 22:50:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:32,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2021-11-20 22:50:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:32,989 INFO L225 Difference]: With dead ends: 178 [2021-11-20 22:50:32,990 INFO L226 Difference]: Without dead ends: 158 [2021-11-20 22:50:32,990 INFO L932 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 [2021-11-20 22:50:32,991 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:32,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 544 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:50:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-20 22:50:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2021-11-20 22:50:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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) [2021-11-20 22:50:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2021-11-20 22:50:32,998 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2021-11-20 22:50:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:32,999 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2021-11-20 22:50:32,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-20 22:50:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2021-11-20 22:50:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 22:50:33,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:33,001 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] [2021-11-20 22:50:33,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 22:50:33,001 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:33,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1657971711, now seen corresponding path program 1 times [2021-11-20 22:50:33,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:33,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703088671] [2021-11-20 22:50:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:33,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:33,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:33,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703088671] [2021-11-20 22:50:33,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703088671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:33,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:33,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:50:33,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772981466] [2021-11-20 22:50:33,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:33,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:33,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:33,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:33,101 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-20 22:50:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:33,213 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2021-11-20 22:50:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2021-11-20 22:50:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:33,215 INFO L225 Difference]: With dead ends: 179 [2021-11-20 22:50:33,216 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 22:50:33,216 INFO L932 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 [2021-11-20 22:50:33,217 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:33,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 22:50:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2021-11-20 22:50:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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) [2021-11-20 22:50:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2021-11-20 22:50:33,224 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2021-11-20 22:50:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:33,225 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2021-11-20 22:50:33,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-20 22:50:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2021-11-20 22:50:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 22:50:33,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:33,226 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] [2021-11-20 22:50:33,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 22:50:33,227 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1389824357, now seen corresponding path program 1 times [2021-11-20 22:50:33,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:33,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75832489] [2021-11-20 22:50:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:33,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:33,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:33,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75832489] [2021-11-20 22:50:33,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75832489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:33,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:33,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:50:33,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966233421] [2021-11-20 22:50:33,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:33,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:33,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:33,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:33,468 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:33,603 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2021-11-20 22:50:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:33,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-20 22:50:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:33,605 INFO L225 Difference]: With dead ends: 179 [2021-11-20 22:50:33,605 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 22:50:33,605 INFO L932 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 [2021-11-20 22:50:33,606 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:33,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 380 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:33,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 22:50:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2021-11-20 22:50:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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) [2021-11-20 22:50:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2021-11-20 22:50:33,612 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2021-11-20 22:50:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:33,613 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2021-11-20 22:50:33,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2021-11-20 22:50:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 22:50:33,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:33,614 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] [2021-11-20 22:50:33,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 22:50:33,614 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:33,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:33,615 INFO L85 PathProgramCache]: Analyzing trace with hash 122624058, now seen corresponding path program 1 times [2021-11-20 22:50:33,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:33,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789567104] [2021-11-20 22:50:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:33,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:33,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:33,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789567104] [2021-11-20 22:50:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789567104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:33,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:33,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:50:33,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430671903] [2021-11-20 22:50:33,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:33,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:50:33,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:50:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:50:33,758 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2021-11-20 22:50:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:33,980 INFO L93 Difference]: Finished difference Result 201 states and 312 transitions. [2021-11-20 22:50:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:50:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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 [2021-11-20 22:50:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:33,982 INFO L225 Difference]: With dead ends: 201 [2021-11-20 22:50:33,982 INFO L226 Difference]: Without dead ends: 181 [2021-11-20 22:50:33,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:50:33,983 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 44 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:33,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 776 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:50:33,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-20 22:50:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-11-20 22:50:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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) [2021-11-20 22:50:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2021-11-20 22:50:33,990 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2021-11-20 22:50:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:33,991 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2021-11-20 22:50:33,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2021-11-20 22:50:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2021-11-20 22:50:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 22:50:33,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:33,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:33,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 22:50:33,993 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:33,993 INFO L85 PathProgramCache]: Analyzing trace with hash 24231101, now seen corresponding path program 1 times [2021-11-20 22:50:33,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:33,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757620516] [2021-11-20 22:50:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:33,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:34,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:34,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757620516] [2021-11-20 22:50:34,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757620516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:34,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366612907] [2021-11-20 22:50:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:34,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:34,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:34,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:34,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b96bb98a-e7d2-44e7-b3a5-6aad93626ce2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:50:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:34,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 22:50:34,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:31,027 INFO L328 TraceCheckSpWp]: Computing backward predicates...