./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.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_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/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_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/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_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/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 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:51:37,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:51:37,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:51:37,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:51:37,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:51:37,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:51:37,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:51:37,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:51:37,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:51:37,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:51:37,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:51:37,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:51:37,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:51:37,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:51:37,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:51:37,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:51:37,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:51:37,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:51:37,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:51:37,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:51:37,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:51:37,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:51:37,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:51:37,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:51:37,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:51:37,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:51:37,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:51:37,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:51:37,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:51:37,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:51:37,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:51:37,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:51:37,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:51:37,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:51:37,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:51:37,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:51:37,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:51:37,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:51:37,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:51:37,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:51:37,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:51:37,920 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:51:37,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:51:37,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:51:37,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:51:37,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:51:37,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:51:37,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:51:37,948 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:51:37,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:51:37,949 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:51:37,949 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:51:37,949 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:51:37,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:51:37,949 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:51:37,949 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:51:37,950 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:51:37,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:51:37,950 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:51:37,950 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:51:37,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:51:37,951 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:51:37,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:51:37,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:51:37,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:51:37,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:51:37,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:51:37,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:51:37,952 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:51:37,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:51:37,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:51:37,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:51:37,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:51:37,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:51:37,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:51:37,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:51:37,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:51:37,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:51:37,954 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:51:37,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:51:37,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:51:37,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:51:37,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:51:37,955 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_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 [2021-11-21 01:51:38,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:51:38,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:51:38,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:51:38,280 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:51:38,281 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:51:38,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2021-11-21 01:51:38,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/data/dc035c518/1e67abe1c84147f19c7e0a50c8e2be78/FLAG79e4041cd [2021-11-21 01:51:38,813 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:51:38,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2021-11-21 01:51:38,837 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/data/dc035c518/1e67abe1c84147f19c7e0a50c8e2be78/FLAG79e4041cd [2021-11-21 01:51:39,169 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/data/dc035c518/1e67abe1c84147f19c7e0a50c8e2be78 [2021-11-21 01:51:39,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:51:39,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:51:39,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:51:39,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:51:39,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:51:39,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386d9c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39, skipping insertion in model container [2021-11-21 01:51:39,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:51:39,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:51:39,555 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_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2021-11-21 01:51:39,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:51:39,567 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:51:39,632 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_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2021-11-21 01:51:39,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:51:39,650 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:51:39,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39 WrapperNode [2021-11-21 01:51:39,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:51:39,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:51:39,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:51:39,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:51:39,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,723 INFO L137 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 538 [2021-11-21 01:51:39,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:51:39,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:51:39,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:51:39,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:51:39,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:51:39,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:51:39,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:51:39,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:51:39,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (1/1) ... [2021-11-21 01:51:39,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:51:39,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:39,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:51:39,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:51:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2021-11-21 01:51:39,858 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2021-11-21 01:51:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:51:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2021-11-21 01:51:39,858 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2021-11-21 01:51:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-11-21 01:51:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-11-21 01:51:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2021-11-21 01:51:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2021-11-21 01:51:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:51:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:51:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:51:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2021-11-21 01:51:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2021-11-21 01:51:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:51:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:51:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2021-11-21 01:51:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2021-11-21 01:51:40,036 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:51:40,038 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:51:40,630 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:51:40,884 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:51:40,885 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:51:40,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:51:40 BoogieIcfgContainer [2021-11-21 01:51:40,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:51:40,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:51:40,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:51:40,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:51:40,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:51:39" (1/3) ... [2021-11-21 01:51:40,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1645e08f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:51:40, skipping insertion in model container [2021-11-21 01:51:40,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:39" (2/3) ... [2021-11-21 01:51:40,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1645e08f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:51:40, skipping insertion in model container [2021-11-21 01:51:40,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:51:40" (3/3) ... [2021-11-21 01:51:40,898 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2021-11-21 01:51:40,903 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:51:40,903 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:51:40,977 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:51:40,984 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 [2021-11-21 01:51:40,985 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:51:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-21 01:51:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:51:41,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:41,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:41,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1166703025, now seen corresponding path program 1 times [2021-11-21 01:51:41,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:41,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445048895] [2021-11-21 01:51:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:41,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:41,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:41,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445048895] [2021-11-21 01:51:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445048895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:41,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:41,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:41,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473372465] [2021-11-21 01:51:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:41,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:41,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:41,490 INFO L87 Difference]: Start difference. First operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:41,623 INFO L93 Difference]: Finished difference Result 301 states and 489 transitions. [2021-11-21 01:51:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-21 01:51:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:41,636 INFO L225 Difference]: With dead ends: 301 [2021-11-21 01:51:41,638 INFO L226 Difference]: Without dead ends: 153 [2021-11-21 01:51:41,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:41,652 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 5 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:41,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 626 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-21 01:51:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-21 01:51:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 113 states have (on average 1.5044247787610618) internal successors, (170), 113 states have internal predecessors, (170), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-21 01:51:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2021-11-21 01:51:41,730 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 19 [2021-11-21 01:51:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:41,731 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2021-11-21 01:51:41,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2021-11-21 01:51:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:51:41,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:41,734 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:51:41,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:51:41,734 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:41,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1729445324, now seen corresponding path program 1 times [2021-11-21 01:51:41,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:41,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902877748] [2021-11-21 01:51:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:41,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:41,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:41,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902877748] [2021-11-21 01:51:41,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902877748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:41,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:41,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:41,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879732018] [2021-11-21 01:51:41,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:41,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:41,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:41,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:41,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:41,859 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:51:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:42,267 INFO L93 Difference]: Finished difference Result 435 states and 675 transitions. [2021-11-21 01:51:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2021-11-21 01:51:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:42,310 INFO L225 Difference]: With dead ends: 435 [2021-11-21 01:51:42,310 INFO L226 Difference]: Without dead ends: 285 [2021-11-21 01:51:42,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:51:42,313 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 569 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:42,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 596 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:51:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-21 01:51:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 187. [2021-11-21 01:51:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5070422535211268) internal successors, (214), 142 states have internal predecessors, (214), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-21 01:51:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 282 transitions. [2021-11-21 01:51:42,344 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 282 transitions. Word has length 30 [2021-11-21 01:51:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:42,344 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 282 transitions. [2021-11-21 01:51:42,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:51:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 282 transitions. [2021-11-21 01:51:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 01:51:42,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:42,347 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:51:42,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:51:42,347 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:42,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1540164151, now seen corresponding path program 1 times [2021-11-21 01:51:42,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:42,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391224387] [2021-11-21 01:51:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:42,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:42,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:42,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391224387] [2021-11-21 01:51:42,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391224387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:42,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:42,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:42,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834209813] [2021-11-21 01:51:42,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:42,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:42,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:42,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:42,459 INFO L87 Difference]: Start difference. First operand 187 states and 282 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:51:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:42,782 INFO L93 Difference]: Finished difference Result 435 states and 673 transitions. [2021-11-21 01:51:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:42,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2021-11-21 01:51:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:42,787 INFO L225 Difference]: With dead ends: 435 [2021-11-21 01:51:42,788 INFO L226 Difference]: Without dead ends: 285 [2021-11-21 01:51:42,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:51:42,797 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 565 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:42,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 599 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-21 01:51:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 187. [2021-11-21 01:51:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5) internal successors, (213), 142 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-21 01:51:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 281 transitions. [2021-11-21 01:51:42,857 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 281 transitions. Word has length 31 [2021-11-21 01:51:42,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:42,857 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 281 transitions. [2021-11-21 01:51:42,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:51:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 281 transitions. [2021-11-21 01:51:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:51:42,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:42,863 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:51:42,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:51:42,864 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1852556943, now seen corresponding path program 1 times [2021-11-21 01:51:42,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260654686] [2021-11-21 01:51:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:42,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:42,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260654686] [2021-11-21 01:51:42,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260654686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:42,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:42,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:42,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553662257] [2021-11-21 01:51:42,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:42,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:42,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:42,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:42,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:42,999 INFO L87 Difference]: Start difference. First operand 187 states and 281 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:51:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:43,072 INFO L93 Difference]: Finished difference Result 342 states and 516 transitions. [2021-11-21 01:51:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:43,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-11-21 01:51:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:43,075 INFO L225 Difference]: With dead ends: 342 [2021-11-21 01:51:43,076 INFO L226 Difference]: Without dead ends: 192 [2021-11-21 01:51:43,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:43,078 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:43,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 638 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:51:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-21 01:51:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-11-21 01:51:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 146 states have (on average 1.4863013698630136) internal successors, (217), 146 states have internal predecessors, (217), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-21 01:51:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 285 transitions. [2021-11-21 01:51:43,097 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 285 transitions. Word has length 33 [2021-11-21 01:51:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:43,098 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 285 transitions. [2021-11-21 01:51:43,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:51:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 285 transitions. [2021-11-21 01:51:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:51:43,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:43,100 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:51:43,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:51:43,101 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:43,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1321944341, now seen corresponding path program 1 times [2021-11-21 01:51:43,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:43,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644451958] [2021-11-21 01:51:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:43,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:43,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644451958] [2021-11-21 01:51:43,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644451958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:43,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:43,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:43,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648139558] [2021-11-21 01:51:43,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:43,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:43,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:43,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:43,203 INFO L87 Difference]: Start difference. First operand 192 states and 285 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:51:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:43,296 INFO L93 Difference]: Finished difference Result 352 states and 527 transitions. [2021-11-21 01:51:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2021-11-21 01:51:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:43,300 INFO L225 Difference]: With dead ends: 352 [2021-11-21 01:51:43,305 INFO L226 Difference]: Without dead ends: 197 [2021-11-21 01:51:43,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:43,307 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 6 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:43,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 624 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-21 01:51:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-21 01:51:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 150 states have (on average 1.4733333333333334) internal successors, (221), 150 states have internal predecessors, (221), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-21 01:51:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2021-11-21 01:51:43,331 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 41 [2021-11-21 01:51:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:43,333 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2021-11-21 01:51:43,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:51:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2021-11-21 01:51:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 01:51:43,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:43,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:43,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:51:43,340 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:43,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:43,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1907041343, now seen corresponding path program 1 times [2021-11-21 01:51:43,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:43,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425201159] [2021-11-21 01:51:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:43,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:43,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:43,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425201159] [2021-11-21 01:51:43,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425201159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:43,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:43,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:43,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141998247] [2021-11-21 01:51:43,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:43,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:43,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:43,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:43,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:43,478 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:51:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:43,578 INFO L93 Difference]: Finished difference Result 361 states and 531 transitions. [2021-11-21 01:51:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-21 01:51:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:43,584 INFO L225 Difference]: With dead ends: 361 [2021-11-21 01:51:43,584 INFO L226 Difference]: Without dead ends: 201 [2021-11-21 01:51:43,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:43,587 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 5 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:43,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 633 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-21 01:51:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-11-21 01:51:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 153 states have internal predecessors, (224), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-21 01:51:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2021-11-21 01:51:43,612 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 49 [2021-11-21 01:51:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:43,613 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2021-11-21 01:51:43,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:51:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2021-11-21 01:51:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 01:51:43,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:43,615 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:51:43,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:51:43,615 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:43,616 INFO L85 PathProgramCache]: Analyzing trace with hash 8533350, now seen corresponding path program 1 times [2021-11-21 01:51:43,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:43,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745429559] [2021-11-21 01:51:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:43,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:43,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:43,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745429559] [2021-11-21 01:51:43,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745429559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:43,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:43,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:43,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450083064] [2021-11-21 01:51:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:43,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:43,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:43,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:43,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:43,781 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:51:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:43,868 INFO L93 Difference]: Finished difference Result 370 states and 541 transitions. [2021-11-21 01:51:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:43,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-21 01:51:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:43,872 INFO L225 Difference]: With dead ends: 370 [2021-11-21 01:51:43,873 INFO L226 Difference]: Without dead ends: 206 [2021-11-21 01:51:43,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:43,877 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 6 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:43,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 624 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:43,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-21 01:51:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-21 01:51:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 157 states have (on average 1.4522292993630572) internal successors, (228), 157 states have internal predecessors, (228), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-21 01:51:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 296 transitions. [2021-11-21 01:51:43,908 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 296 transitions. Word has length 49 [2021-11-21 01:51:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:43,909 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 296 transitions. [2021-11-21 01:51:43,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:51:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 296 transitions. [2021-11-21 01:51:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 01:51:43,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:43,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:43,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:51:43,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash -311743642, now seen corresponding path program 1 times [2021-11-21 01:51:43,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:43,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662803858] [2021-11-21 01:51:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:43,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:51:44,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:44,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662803858] [2021-11-21 01:51:44,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662803858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:44,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:44,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:44,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640024199] [2021-11-21 01:51:44,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:44,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:44,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:44,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:44,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:44,007 INFO L87 Difference]: Start difference. First operand 206 states and 296 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:51:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:44,083 INFO L93 Difference]: Finished difference Result 381 states and 548 transitions. [2021-11-21 01:51:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2021-11-21 01:51:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:44,087 INFO L225 Difference]: With dead ends: 381 [2021-11-21 01:51:44,087 INFO L226 Difference]: Without dead ends: 212 [2021-11-21 01:51:44,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:44,088 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 7 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:44,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 635 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-21 01:51:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-21 01:51:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 162 states have internal predecessors, (233), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-21 01:51:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 301 transitions. [2021-11-21 01:51:44,105 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 301 transitions. Word has length 57 [2021-11-21 01:51:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:44,105 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 301 transitions. [2021-11-21 01:51:44,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:51:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 301 transitions. [2021-11-21 01:51:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 01:51:44,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:44,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:44,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:51:44,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:44,108 INFO L85 PathProgramCache]: Analyzing trace with hash -71883967, now seen corresponding path program 1 times [2021-11-21 01:51:44,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:44,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890936545] [2021-11-21 01:51:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:44,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:51:44,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:44,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890936545] [2021-11-21 01:51:44,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890936545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:51:44,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257384254] [2021-11-21 01:51:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:44,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:44,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:44,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:51:44,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:51:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:44,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:51:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:51:44,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:51:44,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257384254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:44,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:51:44,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2021-11-21 01:51:44,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100449046] [2021-11-21 01:51:44,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:44,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:51:44,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:44,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:51:44,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:51:44,881 INFO L87 Difference]: Start difference. First operand 212 states and 301 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:51:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:45,172 INFO L93 Difference]: Finished difference Result 601 states and 839 transitions. [2021-11-21 01:51:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:51:45,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2021-11-21 01:51:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:45,177 INFO L225 Difference]: With dead ends: 601 [2021-11-21 01:51:45,178 INFO L226 Difference]: Without dead ends: 400 [2021-11-21 01:51:45,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:51:45,179 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 233 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:45,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1099 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-21 01:51:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 396. [2021-11-21 01:51:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 300 states have (on average 1.42) internal successors, (426), 301 states have internal predecessors, (426), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-21 01:51:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 556 transitions. [2021-11-21 01:51:45,209 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 556 transitions. Word has length 60 [2021-11-21 01:51:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:45,210 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 556 transitions. [2021-11-21 01:51:45,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:51:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 556 transitions. [2021-11-21 01:51:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 01:51:45,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:45,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:45,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:51:45,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:51:45,440 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:51:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash -399936524, now seen corresponding path program 1 times [2021-11-21 01:51:45,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:45,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035864430] [2021-11-21 01:51:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:45,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:51:45,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035864430] [2021-11-21 01:51:45,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035864430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:51:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589310163] [2021-11-21 01:51:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:45,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:45,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:45,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:51:45,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:51:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:45,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:51:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:46,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:51:46,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589310163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:46,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1024586686] [2021-11-21 01:51:46,556 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2021-11-21 01:51:46,556 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:51:46,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:51:46,567 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:51:46,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:52:08,407 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 154 for LOIs [2021-11-21 01:52:09,842 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 122 for LOIs [2021-11-21 01:52:10,207 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 92 for LOIs [2021-11-21 01:52:11,116 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:52:18,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1024586686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:18,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:52:18,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2021-11-21 01:52:18,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653513617] [2021-11-21 01:52:18,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:18,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:52:18,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:18,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:52:18,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:52:18,702 INFO L87 Difference]: Start difference. First operand 396 states and 556 transitions. Second operand has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:52:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:28,392 INFO L93 Difference]: Finished difference Result 821 states and 1160 transitions. [2021-11-21 01:52:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:52:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2021-11-21 01:52:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:28,398 INFO L225 Difference]: With dead ends: 821 [2021-11-21 01:52:28,399 INFO L226 Difference]: Without dead ends: 465 [2021-11-21 01:52:28,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:52:28,402 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 195 mSDsluCounter, 3016 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:28,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 3280 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-21 01:52:28,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-21 01:52:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 442. [2021-11-21 01:52:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 331 states have (on average 1.3987915407854985) internal successors, (463), 332 states have internal predecessors, (463), 78 states have call successors, (78), 32 states have call predecessors, (78), 32 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-21 01:52:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 619 transitions. [2021-11-21 01:52:28,455 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 619 transitions. Word has length 62 [2021-11-21 01:52:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:28,456 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 619 transitions. [2021-11-21 01:52:28,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:52:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 619 transitions. [2021-11-21 01:52:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 01:52:28,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:28,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:52:28,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:52:28,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:52:28,672 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:52:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:28,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1021702805, now seen corresponding path program 1 times [2021-11-21 01:52:28,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:28,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980815216] [2021-11-21 01:52:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:28,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:52:28,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:28,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980815216] [2021-11-21 01:52:28,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980815216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:52:28,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214639986] [2021-11-21 01:52:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:28,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:28,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:52:28,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:52:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:29,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:52:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:52:29,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:52:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:52:29,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214639986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:52:29,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618050875] [2021-11-21 01:52:29,744 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2021-11-21 01:52:29,744 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:52:29,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:52:29,745 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:52:29,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:52:54,396 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2021-11-21 01:52:55,931 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2021-11-21 01:52:56,163 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 112 for LOIs [2021-11-21 01:52:57,375 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:53:08,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1618050875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:08,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:53:08,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2021-11-21 01:53:08,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616532106] [2021-11-21 01:53:08,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:08,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:53:08,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:53:08,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:53:08,040 INFO L87 Difference]: Start difference. First operand 442 states and 619 transitions. Second operand has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:53:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:15,615 INFO L93 Difference]: Finished difference Result 890 states and 1256 transitions. [2021-11-21 01:53:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:53:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2021-11-21 01:53:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:15,620 INFO L225 Difference]: With dead ends: 890 [2021-11-21 01:53:15,620 INFO L226 Difference]: Without dead ends: 523 [2021-11-21 01:53:15,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:53:15,623 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 93 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:15,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 3413 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-21 01:53:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-21 01:53:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 500. [2021-11-21 01:53:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 372 states have (on average 1.3709677419354838) internal successors, (510), 373 states have internal predecessors, (510), 92 states have call successors, (92), 35 states have call predecessors, (92), 35 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-21 01:53:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 694 transitions. [2021-11-21 01:53:15,698 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 694 transitions. Word has length 62 [2021-11-21 01:53:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:15,698 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 694 transitions. [2021-11-21 01:53:15,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:53:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 694 transitions. [2021-11-21 01:53:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 01:53:15,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:15,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:53:15,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:53:15,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:53:15,928 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:53:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1730036152, now seen corresponding path program 1 times [2021-11-21 01:53:15,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:15,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629415173] [2021-11-21 01:53:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:15,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:53:16,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629415173] [2021-11-21 01:53:16,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629415173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:53:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058321593] [2021-11-21 01:53:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:16,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:53:16,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:53:16,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:53:16,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:53:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:16,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:53:16,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:53:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:53:16,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:53:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:53:16,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058321593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:53:16,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570572219] [2021-11-21 01:53:16,789 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2021-11-21 01:53:16,789 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:53:16,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:53:16,790 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:53:16,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:53:36,772 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 149 for LOIs [2021-11-21 01:53:38,153 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2021-11-21 01:53:38,331 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 91 for LOIs [2021-11-21 01:53:39,176 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:53:47,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [570572219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:47,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:53:47,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [9, 9, 9] total 39 [2021-11-21 01:53:47,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594710564] [2021-11-21 01:53:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:47,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:53:47,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:53:47,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 01:53:47,247 INFO L87 Difference]: Start difference. First operand 500 states and 694 transitions. Second operand has 28 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:53:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:57,248 INFO L93 Difference]: Finished difference Result 925 states and 1301 transitions. [2021-11-21 01:53:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 01:53:57,249 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 64 [2021-11-21 01:53:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:57,253 INFO L225 Difference]: With dead ends: 925 [2021-11-21 01:53:57,253 INFO L226 Difference]: Without dead ends: 569 [2021-11-21 01:53:57,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 01:53:57,256 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 145 mSDsluCounter, 4065 mSDsCounter, 0 mSdLazyCounter, 2731 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 4367 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:57,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 4367 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2731 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-21 01:53:57,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-21 01:53:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 520. [2021-11-21 01:53:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 386 states have (on average 1.3523316062176165) internal successors, (522), 387 states have internal predecessors, (522), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-21 01:53:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 716 transitions. [2021-11-21 01:53:57,332 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 716 transitions. Word has length 64 [2021-11-21 01:53:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:57,333 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 716 transitions. [2021-11-21 01:53:57,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:53:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 716 transitions. [2021-11-21 01:53:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:53:57,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:57,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:53:57,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:53:57,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:53:57,547 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:53:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1308659894, now seen corresponding path program 1 times [2021-11-21 01:53:57,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:57,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671879018] [2021-11-21 01:53:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:57,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:53:57,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:57,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671879018] [2021-11-21 01:53:57,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671879018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:57,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:57,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:53:57,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692049864] [2021-11-21 01:53:57,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:57,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:53:57,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:57,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:53:57,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:53:57,630 INFO L87 Difference]: Start difference. First operand 520 states and 716 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 01:53:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:57,740 INFO L93 Difference]: Finished difference Result 932 states and 1310 transitions. [2021-11-21 01:53:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:53:57,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2021-11-21 01:53:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:57,746 INFO L225 Difference]: With dead ends: 932 [2021-11-21 01:53:57,747 INFO L226 Difference]: Without dead ends: 528 [2021-11-21 01:53:57,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:57,750 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 5 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:57,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 633 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:53:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-21 01:53:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2021-11-21 01:53:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 392 states have (on average 1.346938775510204) internal successors, (528), 393 states have internal predecessors, (528), 97 states have call successors, (97), 38 states have call predecessors, (97), 38 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-21 01:53:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 722 transitions. [2021-11-21 01:53:57,823 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 722 transitions. Word has length 66 [2021-11-21 01:53:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:57,824 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 722 transitions. [2021-11-21 01:53:57,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 01:53:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 722 transitions. [2021-11-21 01:53:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 01:53:57,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:57,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:53:57,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:53:57,826 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:53:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1919104316, now seen corresponding path program 1 times [2021-11-21 01:53:57,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:57,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396010912] [2021-11-21 01:53:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:57,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:53:57,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:57,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396010912] [2021-11-21 01:53:57,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396010912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:53:57,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276820621] [2021-11-21 01:53:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:57,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:53:57,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:53:57,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:53:58,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:53:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:53:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:53:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:53:58,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:53:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:53:58,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276820621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:53:58,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533660979] [2021-11-21 01:53:58,687 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2021-11-21 01:53:58,687 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:53:58,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:53:58,688 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:53:58,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:54:53,205 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 106 for LOIs [2021-11-21 01:54:53,771 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 122 for LOIs [2021-11-21 01:54:54,140 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 93 for LOIs [2021-11-21 01:54:54,907 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 99 for LOIs [2021-11-21 01:54:56,209 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 96 for LOIs [2021-11-21 01:54:57,926 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 112 for LOIs [2021-11-21 01:54:59,257 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:55:22,279 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:55:22,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:55:22,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2021-11-21 01:55:22,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230314953] [2021-11-21 01:55:22,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:55:22,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:55:22,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:55:22,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2789, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:55:22,282 INFO L87 Difference]: Start difference. First operand 528 states and 722 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-21 01:55:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:22,915 INFO L93 Difference]: Finished difference Result 1272 states and 1774 transitions. [2021-11-21 01:55:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:55:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 70 [2021-11-21 01:55:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:22,923 INFO L225 Difference]: With dead ends: 1272 [2021-11-21 01:55:22,923 INFO L226 Difference]: Without dead ends: 876 [2021-11-21 01:55:22,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 160 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=317, Invalid=3343, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 01:55:22,925 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 307 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 3077 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:22,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 3077 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:55:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-11-21 01:55:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 550. [2021-11-21 01:55:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 407 states have (on average 1.3095823095823096) internal successors, (533), 410 states have internal predecessors, (533), 95 states have call successors, (95), 47 states have call predecessors, (95), 47 states have return successors, (95), 92 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-21 01:55:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 723 transitions. [2021-11-21 01:55:23,017 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 723 transitions. Word has length 70 [2021-11-21 01:55:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:23,018 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 723 transitions. [2021-11-21 01:55:23,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-21 01:55:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 723 transitions. [2021-11-21 01:55:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-21 01:55:23,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:23,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:55:23,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:55:23,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 01:55:23,241 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1025192534, now seen corresponding path program 1 times [2021-11-21 01:55:23,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:23,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346280656] [2021-11-21 01:55:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:23,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:55:23,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:23,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346280656] [2021-11-21 01:55:23,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346280656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:23,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:23,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:55:23,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113174073] [2021-11-21 01:55:23,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:23,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:55:23,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:55:23,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:55:23,420 INFO L87 Difference]: Start difference. First operand 550 states and 723 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:55:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:24,163 INFO L93 Difference]: Finished difference Result 1212 states and 1676 transitions. [2021-11-21 01:55:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:55:24,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 71 [2021-11-21 01:55:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:24,173 INFO L225 Difference]: With dead ends: 1212 [2021-11-21 01:55:24,174 INFO L226 Difference]: Without dead ends: 900 [2021-11-21 01:55:24,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:55:24,176 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 580 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:24,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 1876 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:55:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-11-21 01:55:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 684. [2021-11-21 01:55:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 504 states have (on average 1.3115079365079365) internal successors, (661), 507 states have internal predecessors, (661), 119 states have call successors, (119), 60 states have call predecessors, (119), 60 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2021-11-21 01:55:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 899 transitions. [2021-11-21 01:55:24,282 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 899 transitions. Word has length 71 [2021-11-21 01:55:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:24,282 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 899 transitions. [2021-11-21 01:55:24,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:55:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 899 transitions. [2021-11-21 01:55:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:55:24,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:24,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:55:24,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:55:24,285 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:24,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:24,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1420846434, now seen corresponding path program 1 times [2021-11-21 01:55:24,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:24,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113422685] [2021-11-21 01:55:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:24,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:55:24,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113422685] [2021-11-21 01:55:24,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113422685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:24,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:24,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:55:24,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120040555] [2021-11-21 01:55:24,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:24,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:55:24,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:24,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:55:24,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:55:24,406 INFO L87 Difference]: Start difference. First operand 684 states and 899 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:55:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:25,255 INFO L93 Difference]: Finished difference Result 1587 states and 2196 transitions. [2021-11-21 01:55:25,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:55:25,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2021-11-21 01:55:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:25,265 INFO L225 Difference]: With dead ends: 1587 [2021-11-21 01:55:25,265 INFO L226 Difference]: Without dead ends: 1245 [2021-11-21 01:55:25,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:55:25,268 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 607 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 2281 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:25,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 2281 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:55:25,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-11-21 01:55:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 952. [2021-11-21 01:55:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 697 states have (on average 1.3228120516499282) internal successors, (922), 702 states have internal predecessors, (922), 169 states have call successors, (169), 85 states have call predecessors, (169), 85 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2021-11-21 01:55:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1260 transitions. [2021-11-21 01:55:25,429 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1260 transitions. Word has length 73 [2021-11-21 01:55:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:25,429 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1260 transitions. [2021-11-21 01:55:25,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:55:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1260 transitions. [2021-11-21 01:55:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:55:25,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:25,432 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:55:25,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:55:25,432 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1353804532, now seen corresponding path program 1 times [2021-11-21 01:55:25,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:25,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049914234] [2021-11-21 01:55:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:25,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:55:25,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:25,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049914234] [2021-11-21 01:55:25,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049914234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:55:25,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438997302] [2021-11-21 01:55:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:25,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:25,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:25,588 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:25,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:55:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:55:25,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:55:25,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:55:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:55:26,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438997302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:55:26,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182657777] [2021-11-21 01:55:26,154 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2021-11-21 01:55:26,155 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:55:26,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:55:26,156 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:55:26,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:56:08,250 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 154 for LOIs [2021-11-21 01:56:09,668 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 122 for LOIs [2021-11-21 01:56:10,040 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 120 for LOIs [2021-11-21 01:56:11,529 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 112 for LOIs [2021-11-21 01:56:12,957 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:56:33,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1182657777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:33,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:56:33,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [8, 9, 9] total 49 [2021-11-21 01:56:33,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911289139] [2021-11-21 01:56:33,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:33,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 01:56:33,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 01:56:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2021-11-21 01:56:33,890 INFO L87 Difference]: Start difference. First operand 952 states and 1260 transitions. Second operand has 38 states, 32 states have (on average 1.5) internal successors, (48), 26 states have internal predecessors, (48), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-21 01:56:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:42,268 INFO L93 Difference]: Finished difference Result 1539 states and 2059 transitions. [2021-11-21 01:56:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-21 01:56:42,269 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.5) internal successors, (48), 26 states have internal predecessors, (48), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-11-21 01:56:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:42,274 INFO L225 Difference]: With dead ends: 1539 [2021-11-21 01:56:42,274 INFO L226 Difference]: Without dead ends: 938 [2021-11-21 01:56:42,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 185 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2021-11-21 01:56:42,278 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 92 mSDsluCounter, 2766 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:42,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 2945 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2593 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-21 01:56:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-21 01:56:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2021-11-21 01:56:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 687 states have (on average 1.321688500727802) internal successors, (908), 692 states have internal predecessors, (908), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2021-11-21 01:56:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1240 transitions. [2021-11-21 01:56:42,437 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1240 transitions. Word has length 77 [2021-11-21 01:56:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:42,438 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1240 transitions. [2021-11-21 01:56:42,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.5) internal successors, (48), 26 states have internal predecessors, (48), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-21 01:56:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1240 transitions. [2021-11-21 01:56:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:56:42,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:42,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:42,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:42,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:56:42,656 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:42,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1929568331, now seen corresponding path program 1 times [2021-11-21 01:56:42,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:42,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133763133] [2021-11-21 01:56:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:42,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:56:42,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:42,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133763133] [2021-11-21 01:56:42,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133763133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:56:42,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136770129] [2021-11-21 01:56:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:42,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:42,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:42,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:56:42,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:56:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:56:42,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:56:43,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:56:43,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136770129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:43,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:56:43,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-21 01:56:43,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849139683] [2021-11-21 01:56:43,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:43,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:56:43,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:43,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:56:43,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:56:43,183 INFO L87 Difference]: Start difference. First operand 938 states and 1240 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:56:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:43,860 INFO L93 Difference]: Finished difference Result 1839 states and 2507 transitions. [2021-11-21 01:56:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:56:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2021-11-21 01:56:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:43,868 INFO L225 Difference]: With dead ends: 1839 [2021-11-21 01:56:43,868 INFO L226 Difference]: Without dead ends: 1121 [2021-11-21 01:56:43,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:56:43,871 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 518 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:43,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1739 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:56:43,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-21 01:56:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 938. [2021-11-21 01:56:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 687 states have (on average 1.3158660844250365) internal successors, (904), 692 states have internal predecessors, (904), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2021-11-21 01:56:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1236 transitions. [2021-11-21 01:56:44,030 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1236 transitions. Word has length 77 [2021-11-21 01:56:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:44,031 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1236 transitions. [2021-11-21 01:56:44,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:56:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1236 transitions. [2021-11-21 01:56:44,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 01:56:44,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:44,037 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:44,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:44,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:56:44,260 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:44,260 INFO L85 PathProgramCache]: Analyzing trace with hash -580328748, now seen corresponding path program 1 times [2021-11-21 01:56:44,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:44,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003666209] [2021-11-21 01:56:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:44,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:56:44,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:44,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003666209] [2021-11-21 01:56:44,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003666209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:44,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:44,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:56:44,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068177287] [2021-11-21 01:56:44,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:44,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:56:44,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:56:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:56:44,348 INFO L87 Difference]: Start difference. First operand 938 states and 1236 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-21 01:56:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:44,670 INFO L93 Difference]: Finished difference Result 1245 states and 1718 transitions. [2021-11-21 01:56:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:56:44,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 80 [2021-11-21 01:56:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:44,679 INFO L225 Difference]: With dead ends: 1245 [2021-11-21 01:56:44,679 INFO L226 Difference]: Without dead ends: 1243 [2021-11-21 01:56:44,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:56:44,681 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 173 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:44,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1517 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:56:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-11-21 01:56:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 946. [2021-11-21 01:56:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 691 states have (on average 1.3140376266280753) internal successors, (908), 698 states have internal predecessors, (908), 168 states have call successors, (168), 86 states have call predecessors, (168), 86 states have return successors, (168), 161 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-21 01:56:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1244 transitions. [2021-11-21 01:56:44,845 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1244 transitions. Word has length 80 [2021-11-21 01:56:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:44,845 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1244 transitions. [2021-11-21 01:56:44,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-21 01:56:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1244 transitions. [2021-11-21 01:56:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-21 01:56:44,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:44,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:44,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:56:44,850 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:44,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1553302716, now seen corresponding path program 1 times [2021-11-21 01:56:44,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:44,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819837147] [2021-11-21 01:56:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:44,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:56:44,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:44,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819837147] [2021-11-21 01:56:44,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819837147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:44,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:44,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:56:44,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530688973] [2021-11-21 01:56:44,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:44,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:56:44,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:44,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:56:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:56:44,919 INFO L87 Difference]: Start difference. First operand 946 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-21 01:56:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:45,119 INFO L93 Difference]: Finished difference Result 1630 states and 2160 transitions. [2021-11-21 01:56:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:56:45,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2021-11-21 01:56:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:45,126 INFO L225 Difference]: With dead ends: 1630 [2021-11-21 01:56:45,126 INFO L226 Difference]: Without dead ends: 934 [2021-11-21 01:56:45,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:56:45,131 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 7 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:45,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 625 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:56:45,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-11-21 01:56:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 934. [2021-11-21 01:56:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 685 states have (on average 1.2905109489051094) internal successors, (884), 692 states have internal predecessors, (884), 162 states have call successors, (162), 86 states have call predecessors, (162), 86 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2021-11-21 01:56:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1208 transitions. [2021-11-21 01:56:45,296 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1208 transitions. Word has length 83 [2021-11-21 01:56:45,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:45,296 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1208 transitions. [2021-11-21 01:56:45,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-21 01:56:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1208 transitions. [2021-11-21 01:56:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-21 01:56:45,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:45,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:45,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 01:56:45,299 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash 201558514, now seen corresponding path program 1 times [2021-11-21 01:56:45,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:45,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065999016] [2021-11-21 01:56:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:45,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 01:56:45,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065999016] [2021-11-21 01:56:45,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065999016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:56:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906401529] [2021-11-21 01:56:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:45,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:45,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:45,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:56:45,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:56:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:56:45,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 01:56:46,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:56:46,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906401529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:46,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478614521] [2021-11-21 01:56:46,427 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2021-11-21 01:56:46,427 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:56:46,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:56:46,428 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:56:46,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:57:54,668 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 106 for LOIs [2021-11-21 01:57:55,255 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 122 for LOIs [2021-11-21 01:57:55,673 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 120 for LOIs [2021-11-21 01:57:57,446 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 121 for LOIs [2021-11-21 01:57:58,839 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 117 for LOIs [2021-11-21 01:58:00,870 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 112 for LOIs [2021-11-21 01:58:02,239 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:58:37,167 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:58:37,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:58:37,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2021-11-21 01:58:37,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52964498] [2021-11-21 01:58:37,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:58:37,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:58:37,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:58:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4203, Unknown=0, NotChecked=0, Total=4692 [2021-11-21 01:58:37,175 INFO L87 Difference]: Start difference. First operand 934 states and 1208 transitions. Second operand has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-21 01:58:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:38,342 INFO L93 Difference]: Finished difference Result 2273 states and 3140 transitions. [2021-11-21 01:58:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:58:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 85 [2021-11-21 01:58:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:38,362 INFO L225 Difference]: With dead ends: 2273 [2021-11-21 01:58:38,362 INFO L226 Difference]: Without dead ends: 1514 [2021-11-21 01:58:38,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 189 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=547, Invalid=5153, Unknown=0, NotChecked=0, Total=5700 [2021-11-21 01:58:38,367 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 507 mSDsluCounter, 4426 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 4596 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:38,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 4596 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:58:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-11-21 01:58:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 913. [2021-11-21 01:58:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 670 states have (on average 1.2835820895522387) internal successors, (860), 677 states have internal predecessors, (860), 156 states have call successors, (156), 86 states have call predecessors, (156), 86 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2021-11-21 01:58:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1172 transitions. [2021-11-21 01:58:38,529 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1172 transitions. Word has length 85 [2021-11-21 01:58:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:38,530 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1172 transitions. [2021-11-21 01:58:38,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-21 01:58:38,531 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1172 transitions. [2021-11-21 01:58:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-21 01:58:38,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:38,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:58:38,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:58:38,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-21 01:58:38,755 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:58:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:38,756 INFO L85 PathProgramCache]: Analyzing trace with hash -243594597, now seen corresponding path program 1 times [2021-11-21 01:58:38,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:38,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681719912] [2021-11-21 01:58:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:38,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:58:38,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:38,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681719912] [2021-11-21 01:58:38,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681719912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:58:38,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017663895] [2021-11-21 01:58:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:38,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:38,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:58:38,923 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:58:38,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:58:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:39,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:58:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:58:39,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:58:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:58:39,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017663895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:58:39,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428141328] [2021-11-21 01:58:39,547 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2021-11-21 01:58:39,548 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:58:39,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:58:39,548 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:58:39,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:59:22,040 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 154 for LOIs [2021-11-21 01:59:23,446 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2021-11-21 01:59:23,649 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 105 for LOIs [2021-11-21 01:59:25,428 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 123 for LOIs [2021-11-21 01:59:26,938 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 112 for LOIs [2021-11-21 01:59:28,629 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:59:57,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [428141328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:59:57,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:59:57,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2021-11-21 01:59:57,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890291208] [2021-11-21 01:59:57,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:59:57,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-21 01:59:57,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:57,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-21 01:59:57,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2654, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:59:57,370 INFO L87 Difference]: Start difference. First operand 913 states and 1172 transitions. Second operand has 44 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 30 states have internal predecessors, (50), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-21 02:00:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:00:07,507 INFO L93 Difference]: Finished difference Result 1540 states and 2012 transitions. [2021-11-21 02:00:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-21 02:00:07,507 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 30 states have internal predecessors, (50), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 85 [2021-11-21 02:00:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:00:07,512 INFO L225 Difference]: With dead ends: 1540 [2021-11-21 02:00:07,512 INFO L226 Difference]: Without dead ends: 948 [2021-11-21 02:00:07,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 202 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=352, Invalid=3070, Unknown=0, NotChecked=0, Total=3422 [2021-11-21 02:00:07,517 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 191 mSDsluCounter, 4111 mSDsCounter, 0 mSdLazyCounter, 3384 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 4385 SdHoareTripleChecker+Invalid, 3464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-21 02:00:07,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 4385 Invalid, 3464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3384 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-11-21 02:00:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-11-21 02:00:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 916. [2021-11-21 02:00:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 672 states have (on average 1.2827380952380953) internal successors, (862), 679 states have internal predecessors, (862), 157 states have call successors, (157), 86 states have call predecessors, (157), 86 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2021-11-21 02:00:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1176 transitions. [2021-11-21 02:00:07,679 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1176 transitions. Word has length 85 [2021-11-21 02:00:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:00:07,679 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1176 transitions. [2021-11-21 02:00:07,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 30 states have internal predecessors, (50), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-21 02:00:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1176 transitions. [2021-11-21 02:00:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 02:00:07,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:00:07,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:00:07,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:07,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-21 02:00:07,895 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:00:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:00:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1132345976, now seen corresponding path program 1 times [2021-11-21 02:00:07,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:00:07,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490599950] [2021-11-21 02:00:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:07,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:00:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 02:00:08,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:00:08,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490599950] [2021-11-21 02:00:08,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490599950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:00:08,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980350552] [2021-11-21 02:00:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:08,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:08,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:00:08,064 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:00:08,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 02:00:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:08,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 02:00:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 02:00:08,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 02:00:08,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980350552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602314446] [2021-11-21 02:00:08,638 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-21 02:00:08,638 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:00:08,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:00:08,639 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:00:08,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:01:01,785 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 150 for LOIs [2021-11-21 02:01:03,175 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2021-11-21 02:01:03,367 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 118 for LOIs [2021-11-21 02:01:05,252 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 103 for LOIs [2021-11-21 02:01:06,874 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 111 for LOIs [2021-11-21 02:01:08,623 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:01:38,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1602314446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 02:01:38,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:01:38,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [8, 9, 9] total 57 [2021-11-21 02:01:38,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926661813] [2021-11-21 02:01:38,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:01:38,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 02:01:38,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:01:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 02:01:38,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2862, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 02:01:38,423 INFO L87 Difference]: Start difference. First operand 916 states and 1176 transitions. Second operand has 46 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 32 states have internal predecessors, (52), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-21 02:01:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:01:52,987 INFO L93 Difference]: Finished difference Result 1543 states and 2016 transitions. [2021-11-21 02:01:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-21 02:01:52,988 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 32 states have internal predecessors, (52), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 87 [2021-11-21 02:01:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:01:52,996 INFO L225 Difference]: With dead ends: 1543 [2021-11-21 02:01:52,996 INFO L226 Difference]: Without dead ends: 951 [2021-11-21 02:01:53,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 207 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=363, Invalid=3297, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 02:01:53,001 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 184 mSDsluCounter, 5865 mSDsCounter, 0 mSdLazyCounter, 4800 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 6144 SdHoareTripleChecker+Invalid, 4859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 4800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-21 02:01:53,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 6144 Invalid, 4859 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [59 Valid, 4800 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-21 02:01:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-11-21 02:01:53,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 919. [2021-11-21 02:01:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 674 states have (on average 1.281899109792285) internal successors, (864), 681 states have internal predecessors, (864), 158 states have call successors, (158), 86 states have call predecessors, (158), 86 states have return successors, (158), 151 states have call predecessors, (158), 158 states have call successors, (158) [2021-11-21 02:01:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1180 transitions. [2021-11-21 02:01:53,152 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1180 transitions. Word has length 87 [2021-11-21 02:01:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:01:53,152 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1180 transitions. [2021-11-21 02:01:53,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 32 states have internal predecessors, (52), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-21 02:01:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1180 transitions. [2021-11-21 02:01:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 02:01:53,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:01:53,154 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:01:53,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 02:01:53,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:01:53,355 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:01:53,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:01:53,355 INFO L85 PathProgramCache]: Analyzing trace with hash 195394202, now seen corresponding path program 1 times [2021-11-21 02:01:53,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:01:53,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482428768] [2021-11-21 02:01:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:01:53,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:01:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:01:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 02:01:53,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:01:53,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482428768] [2021-11-21 02:01:53,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482428768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 02:01:53,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 02:01:53,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 02:01:53,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857570364] [2021-11-21 02:01:53,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:01:53,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 02:01:53,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:01:53,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 02:01:53,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 02:01:53,431 INFO L87 Difference]: Start difference. First operand 919 states and 1180 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-21 02:01:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:01:53,637 INFO L93 Difference]: Finished difference Result 1564 states and 2030 transitions. [2021-11-21 02:01:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 02:01:53,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 92 [2021-11-21 02:01:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:01:53,643 INFO L225 Difference]: With dead ends: 1564 [2021-11-21 02:01:53,643 INFO L226 Difference]: Without dead ends: 907 [2021-11-21 02:01:53,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 02:01:53,646 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 7 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 02:01:53,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 607 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 02:01:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-11-21 02:01:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2021-11-21 02:01:53,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 668 states have (on average 1.2574850299401197) internal successors, (840), 675 states have internal predecessors, (840), 152 states have call successors, (152), 86 states have call predecessors, (152), 86 states have return successors, (152), 145 states have call predecessors, (152), 152 states have call successors, (152) [2021-11-21 02:01:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1144 transitions. [2021-11-21 02:01:53,857 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1144 transitions. Word has length 92 [2021-11-21 02:01:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:01:53,860 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1144 transitions. [2021-11-21 02:01:53,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-21 02:01:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1144 transitions. [2021-11-21 02:01:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 02:01:53,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:01:53,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:01:53,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-21 02:01:53,864 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:01:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:01:53,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1434458984, now seen corresponding path program 1 times [2021-11-21 02:01:53,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:01:53,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649375921] [2021-11-21 02:01:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:01:53,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:01:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:01:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 02:01:54,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:01:54,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649375921] [2021-11-21 02:01:54,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649375921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:01:54,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337022608] [2021-11-21 02:01:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:01:54,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:01:54,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:01:54,083 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:01:54,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc2f1f9-a6e4-4f4b-bca1-e237a16803af/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 02:01:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:01:54,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 02:01:54,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 02:01:54,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 02:01:54,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337022608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:54,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789653781] [2021-11-21 02:01:54,709 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-21 02:01:54,709 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:01:54,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:01:54,710 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:01:54,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:02:47,487 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2021-11-21 02:02:48,977 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2021-11-21 02:02:49,239 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 105 for LOIs [2021-11-21 02:02:51,177 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 108 for LOIs [2021-11-21 02:02:54,234 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 112 for LOIs [2021-11-21 02:02:55,767 INFO L180 IcfgInterpreter]: Interpretation finished