./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.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_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/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_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/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_5c03be71-94a8-4f6c-b7c7-e74292df1a25/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 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:25:35,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:25:35,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:25:35,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:25:35,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:25:35,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:25:35,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:25:35,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:25:35,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:25:35,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:25:35,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:25:35,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:25:35,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:25:35,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:25:35,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:25:35,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:25:35,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:25:35,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:25:35,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:25:35,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:25:35,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:25:35,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:25:35,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:25:35,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:25:35,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:25:35,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:25:35,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:25:35,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:25:35,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:25:35,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:25:35,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:25:35,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:25:35,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:25:35,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:25:35,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:25:35,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:25:35,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:25:35,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:25:35,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:25:35,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:25:35,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:25:35,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:25:35,978 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:25:35,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:25:35,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:25:35,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:25:35,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:25:35,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:25:35,980 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:25:35,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:25:35,981 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:25:35,981 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:25:35,981 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:25:35,981 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:25:35,982 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:25:35,982 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:25:35,982 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:25:35,982 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:25:35,982 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:25:35,983 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:25:35,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:25:35,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:25:35,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:25:35,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:25:35,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:25:35,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:25:35,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:25:35,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:25:35,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:25:35,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:25:35,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:25:35,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:25:35,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:25:35,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:25:35,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:25:35,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:25:35,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:25:35,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:25:35,987 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:25:35,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:25:35,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:25:35,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:25:35,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:25:35,988 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_5c03be71-94a8-4f6c-b7c7-e74292df1a25/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d [2021-11-21 01:25:36,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:25:36,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:25:36,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:25:36,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:25:36,289 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:25:36,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2021-11-21 01:25:36,363 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/data/627a8337c/fedcfe35b8714a4d91f47412c1de07cb/FLAG4b1067eca [2021-11-21 01:25:37,150 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:25:37,152 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2021-11-21 01:25:37,176 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/data/627a8337c/fedcfe35b8714a4d91f47412c1de07cb/FLAG4b1067eca [2021-11-21 01:25:37,293 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/data/627a8337c/fedcfe35b8714a4d91f47412c1de07cb [2021-11-21 01:25:37,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:25:37,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:25:37,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:25:37,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:25:37,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:25:37,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:25:37" (1/1) ... [2021-11-21 01:25:37,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3406547d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:37, skipping insertion in model container [2021-11-21 01:25:37,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:25:37" (1/1) ... [2021-11-21 01:25:37,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:25:37,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:25:38,050 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_5c03be71-94a8-4f6c-b7c7-e74292df1a25/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2021-11-21 01:25:38,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:25:38,097 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:25:38,386 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_5c03be71-94a8-4f6c-b7c7-e74292df1a25/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2021-11-21 01:25:38,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:25:38,419 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:25:38,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38 WrapperNode [2021-11-21 01:25:38,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:25:38,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:25:38,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:25:38,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:25:38,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,575 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-21 01:25:38,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:25:38,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:25:38,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:25:38,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:25:38,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:25:38,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:25:38,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:25:38,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:25:38,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (1/1) ... [2021-11-21 01:25:38,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:25:38,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:38,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:25:38,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:25:38,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:25:38,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:25:38,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:25:38,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:25:38,875 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:25:38,877 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:25:40,672 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:25:40,970 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:25:40,971 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:25:40,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:25:40 BoogieIcfgContainer [2021-11-21 01:25:40,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:25:40,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:25:40,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:25:40,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:25:40,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:25:37" (1/3) ... [2021-11-21 01:25:40,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c83fa44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:25:40, skipping insertion in model container [2021-11-21 01:25:40,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:38" (2/3) ... [2021-11-21 01:25:40,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c83fa44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:25:40, skipping insertion in model container [2021-11-21 01:25:40,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:25:40" (3/3) ... [2021-11-21 01:25:40,985 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label44.c [2021-11-21 01:25:40,990 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:25:40,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:25:41,053 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:25:41,062 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 01:25:41,062 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:25:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 01:25:41,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:41,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:41,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:41,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash 209345463, now seen corresponding path program 1 times [2021-11-21 01:25:41,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:41,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132400066] [2021-11-21 01:25:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:41,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:41,762 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 01:25:41,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132400066] [2021-11-21 01:25:41,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132400066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:41,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:41,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:41,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962252218] [2021-11-21 01:25:41,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:41,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:41,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:41,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:41,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:41,814 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:42,784 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2021-11-21 01:25:42,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:42,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-21 01:25:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:42,800 INFO L225 Difference]: With dead ends: 440 [2021-11-21 01:25:42,801 INFO L226 Difference]: Without dead ends: 289 [2021-11-21 01:25:42,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:42,808 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:42,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:25:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-21 01:25:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-21 01:25:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8055555555555556) internal successors, (520), 288 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 520 transitions. [2021-11-21 01:25:42,867 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 520 transitions. Word has length 143 [2021-11-21 01:25:42,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:42,868 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 520 transitions. [2021-11-21 01:25:42,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 520 transitions. [2021-11-21 01:25:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:25:42,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:42,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:42,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:25:42,874 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:42,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:42,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1322621345, now seen corresponding path program 1 times [2021-11-21 01:25:42,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:42,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076099459] [2021-11-21 01:25:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:42,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:42,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:42,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076099459] [2021-11-21 01:25:42,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076099459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:42,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:42,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:42,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250631425] [2021-11-21 01:25:42,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:42,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:42,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:42,973 INFO L87 Difference]: Start difference. First operand 289 states and 520 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:43,744 INFO L93 Difference]: Finished difference Result 865 states and 1558 transitions. [2021-11-21 01:25:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:43,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-21 01:25:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:43,751 INFO L225 Difference]: With dead ends: 865 [2021-11-21 01:25:43,751 INFO L226 Difference]: Without dead ends: 577 [2021-11-21 01:25:43,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:43,755 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:43,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 69 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-21 01:25:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2021-11-21 01:25:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.6742160278745644) internal successors, (961), 574 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 961 transitions. [2021-11-21 01:25:43,805 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 961 transitions. Word has length 148 [2021-11-21 01:25:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:43,806 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 961 transitions. [2021-11-21 01:25:43,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 961 transitions. [2021-11-21 01:25:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 01:25:43,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:43,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:43,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:25:43,813 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1094385750, now seen corresponding path program 1 times [2021-11-21 01:25:43,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:43,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962014427] [2021-11-21 01:25:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:43,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:43,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:43,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962014427] [2021-11-21 01:25:43,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962014427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:43,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:43,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:43,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500569726] [2021-11-21 01:25:43,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:43,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:43,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:43,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:43,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:43,890 INFO L87 Difference]: Start difference. First operand 575 states and 961 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:44,683 INFO L93 Difference]: Finished difference Result 1721 states and 2880 transitions. [2021-11-21 01:25:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-21 01:25:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:44,692 INFO L225 Difference]: With dead ends: 1721 [2021-11-21 01:25:44,692 INFO L226 Difference]: Without dead ends: 1147 [2021-11-21 01:25:44,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:44,697 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:44,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-21 01:25:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2021-11-21 01:25:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6282722513089005) internal successors, (1866), 1146 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1866 transitions. [2021-11-21 01:25:44,747 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1866 transitions. Word has length 151 [2021-11-21 01:25:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:44,748 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1866 transitions. [2021-11-21 01:25:44,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1866 transitions. [2021-11-21 01:25:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-21 01:25:44,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:44,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:44,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:25:44,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:44,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash -316852773, now seen corresponding path program 1 times [2021-11-21 01:25:44,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:44,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343106963] [2021-11-21 01:25:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:44,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:25:45,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:45,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343106963] [2021-11-21 01:25:45,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343106963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:45,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:45,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:25:45,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724329871] [2021-11-21 01:25:45,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:45,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:25:45,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:25:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:45,045 INFO L87 Difference]: Start difference. First operand 1147 states and 1866 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:45,984 INFO L93 Difference]: Finished difference Result 2434 states and 3994 transitions. [2021-11-21 01:25:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:25:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-21 01:25:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:45,996 INFO L225 Difference]: With dead ends: 2434 [2021-11-21 01:25:45,996 INFO L226 Difference]: Without dead ends: 1147 [2021-11-21 01:25:45,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:46,010 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 251 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:46,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 11 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:25:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-21 01:25:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2021-11-21 01:25:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4607329842931938) internal successors, (1674), 1146 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1674 transitions. [2021-11-21 01:25:46,061 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1674 transitions. Word has length 158 [2021-11-21 01:25:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:46,062 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1674 transitions. [2021-11-21 01:25:46,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1674 transitions. [2021-11-21 01:25:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-21 01:25:46,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:46,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:46,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:25:46,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:46,070 INFO L85 PathProgramCache]: Analyzing trace with hash 10687328, now seen corresponding path program 1 times [2021-11-21 01:25:46,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:46,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433048942] [2021-11-21 01:25:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:46,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:46,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:46,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433048942] [2021-11-21 01:25:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433048942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:46,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:46,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:25:46,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195853936] [2021-11-21 01:25:46,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:46,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:25:46,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:46,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:25:46,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:46,363 INFO L87 Difference]: Start difference. First operand 1147 states and 1674 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:47,376 INFO L93 Difference]: Finished difference Result 3006 states and 4395 transitions. [2021-11-21 01:25:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:25:47,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-21 01:25:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:47,387 INFO L225 Difference]: With dead ends: 3006 [2021-11-21 01:25:47,388 INFO L226 Difference]: Without dead ends: 1719 [2021-11-21 01:25:47,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:47,397 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 125 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:47,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 43 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:25:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-11-21 01:25:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2021-11-21 01:25:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.4365541327124562) internal successors, (2468), 1718 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2468 transitions. [2021-11-21 01:25:47,453 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2468 transitions. Word has length 174 [2021-11-21 01:25:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:47,454 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2468 transitions. [2021-11-21 01:25:47,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2468 transitions. [2021-11-21 01:25:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-21 01:25:47,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:47,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:47,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:25:47,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1715219333, now seen corresponding path program 1 times [2021-11-21 01:25:47,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:47,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532988109] [2021-11-21 01:25:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:47,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:25:47,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:47,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532988109] [2021-11-21 01:25:47,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532988109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:47,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:47,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:47,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930656689] [2021-11-21 01:25:47,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:47,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:47,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:47,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:47,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:47,608 INFO L87 Difference]: Start difference. First operand 1719 states and 2468 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:48,222 INFO L93 Difference]: Finished difference Result 5155 states and 7402 transitions. [2021-11-21 01:25:48,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:48,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-11-21 01:25:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:48,241 INFO L225 Difference]: With dead ends: 5155 [2021-11-21 01:25:48,242 INFO L226 Difference]: Without dead ends: 3437 [2021-11-21 01:25:48,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:48,245 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:48,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 21 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:25:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-21 01:25:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3435. [2021-11-21 01:25:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.40768782760629) internal successors, (4834), 3434 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4834 transitions. [2021-11-21 01:25:48,365 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4834 transitions. Word has length 176 [2021-11-21 01:25:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:48,365 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 4834 transitions. [2021-11-21 01:25:48,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4834 transitions. [2021-11-21 01:25:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-21 01:25:48,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:48,374 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:48,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:25:48,374 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1441036347, now seen corresponding path program 1 times [2021-11-21 01:25:48,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:48,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250120451] [2021-11-21 01:25:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:48,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:48,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:48,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250120451] [2021-11-21 01:25:48,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250120451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:48,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170093072] [2021-11-21 01:25:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:48,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:48,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:48,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:48,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:25:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:25:48,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 01:25:49,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:49,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170093072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:49,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:49,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:25:49,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690825837] [2021-11-21 01:25:49,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:49,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:49,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:49,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:49,230 INFO L87 Difference]: Start difference. First operand 3435 states and 4834 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:49,928 INFO L93 Difference]: Finished difference Result 7727 states and 10950 transitions. [2021-11-21 01:25:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-21 01:25:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:49,955 INFO L225 Difference]: With dead ends: 7727 [2021-11-21 01:25:49,955 INFO L226 Difference]: Without dead ends: 4293 [2021-11-21 01:25:49,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:49,960 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:49,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 203 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:25:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2021-11-21 01:25:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4293. [2021-11-21 01:25:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.4051724137931034) internal successors, (6031), 4292 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6031 transitions. [2021-11-21 01:25:50,103 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6031 transitions. Word has length 181 [2021-11-21 01:25:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:50,105 INFO L470 AbstractCegarLoop]: Abstraction has 4293 states and 6031 transitions. [2021-11-21 01:25:50,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6031 transitions. [2021-11-21 01:25:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-21 01:25:50,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:50,116 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:50,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:50,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:25:50,333 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1930935373, now seen corresponding path program 1 times [2021-11-21 01:25:50,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:50,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936911920] [2021-11-21 01:25:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:50,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 64 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:25:50,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:50,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936911920] [2021-11-21 01:25:50,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936911920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:50,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913618163] [2021-11-21 01:25:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:50,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:50,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:50,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:50,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:25:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:25:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:25:50,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:50,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913618163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:50,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:50,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-21 01:25:50,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259035006] [2021-11-21 01:25:50,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:50,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:50,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:50,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:50,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:50,977 INFO L87 Difference]: Start difference. First operand 4293 states and 6031 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:51,243 INFO L93 Difference]: Finished difference Result 12877 states and 18091 transitions. [2021-11-21 01:25:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:51,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-21 01:25:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:51,292 INFO L225 Difference]: With dead ends: 12877 [2021-11-21 01:25:51,292 INFO L226 Difference]: Without dead ends: 8585 [2021-11-21 01:25:51,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:51,300 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 188 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:51,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 324 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:25:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-11-21 01:25:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8583. [2021-11-21 01:25:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 1.4006059193661151) internal successors, (12020), 8582 states have internal predecessors, (12020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 12020 transitions. [2021-11-21 01:25:51,553 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 12020 transitions. Word has length 196 [2021-11-21 01:25:51,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:51,554 INFO L470 AbstractCegarLoop]: Abstraction has 8583 states and 12020 transitions. [2021-11-21 01:25:51,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 12020 transitions. [2021-11-21 01:25:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-21 01:25:51,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:51,573 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:51,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:25:51,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:51,789 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1132194896, now seen corresponding path program 1 times [2021-11-21 01:25:51,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:51,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807190351] [2021-11-21 01:25:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:51,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 01:25:51,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:51,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807190351] [2021-11-21 01:25:51,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807190351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:51,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332769713] [2021-11-21 01:25:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:51,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:51,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:51,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:25:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:52,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:25:52,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:25:52,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:52,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332769713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:52,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:52,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:25:52,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579451524] [2021-11-21 01:25:52,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:52,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:52,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:52,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:52,398 INFO L87 Difference]: Start difference. First operand 8583 states and 12020 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:53,151 INFO L93 Difference]: Finished difference Result 23743 states and 33284 transitions. [2021-11-21 01:25:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-21 01:25:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:53,214 INFO L225 Difference]: With dead ends: 23743 [2021-11-21 01:25:53,215 INFO L226 Difference]: Without dead ends: 15161 [2021-11-21 01:25:53,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:53,228 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:53,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 226 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:25:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15161 states. [2021-11-21 01:25:53,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15161 to 15161. [2021-11-21 01:25:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 1.2450527704485488) internal successors, (18875), 15160 states have internal predecessors, (18875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 18875 transitions. [2021-11-21 01:25:53,565 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 18875 transitions. Word has length 200 [2021-11-21 01:25:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:53,566 INFO L470 AbstractCegarLoop]: Abstraction has 15161 states and 18875 transitions. [2021-11-21 01:25:53,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 18875 transitions. [2021-11-21 01:25:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-21 01:25:53,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:53,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 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 01:25:53,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:53,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:25:53,805 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:53,805 INFO L85 PathProgramCache]: Analyzing trace with hash -445986388, now seen corresponding path program 1 times [2021-11-21 01:25:53,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:53,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329908064] [2021-11-21 01:25:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:53,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:53,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329908064] [2021-11-21 01:25:53,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329908064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:53,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:53,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:53,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056298734] [2021-11-21 01:25:53,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:53,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:53,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:53,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:53,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:53,893 INFO L87 Difference]: Start difference. First operand 15161 states and 18875 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:54,636 INFO L93 Difference]: Finished difference Result 35183 states and 44610 transitions. [2021-11-21 01:25:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:54,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-21 01:25:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:54,678 INFO L225 Difference]: With dead ends: 35183 [2021-11-21 01:25:54,678 INFO L226 Difference]: Without dead ends: 20023 [2021-11-21 01:25:54,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:54,696 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 96 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:54,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 76 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:25:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20023 states. [2021-11-21 01:25:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20023 to 20023. [2021-11-21 01:25:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20023 states, 20022 states have (on average 1.192188592548197) internal successors, (23870), 20022 states have internal predecessors, (23870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20023 states to 20023 states and 23870 transitions. [2021-11-21 01:25:55,180 INFO L78 Accepts]: Start accepts. Automaton has 20023 states and 23870 transitions. Word has length 202 [2021-11-21 01:25:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:55,181 INFO L470 AbstractCegarLoop]: Abstraction has 20023 states and 23870 transitions. [2021-11-21 01:25:55,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 20023 states and 23870 transitions. [2021-11-21 01:25:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-21 01:25:55,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:55,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:55,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:25:55,206 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:55,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1334409962, now seen corresponding path program 1 times [2021-11-21 01:25:55,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:55,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205788151] [2021-11-21 01:25:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:55,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:55,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:55,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205788151] [2021-11-21 01:25:55,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205788151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:55,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:55,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:55,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133335144] [2021-11-21 01:25:55,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:55,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:55,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:55,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:55,300 INFO L87 Difference]: Start difference. First operand 20023 states and 23870 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:56,100 INFO L93 Difference]: Finished difference Result 47626 states and 56767 transitions. [2021-11-21 01:25:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-21 01:25:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:56,143 INFO L225 Difference]: With dead ends: 47626 [2021-11-21 01:25:56,143 INFO L226 Difference]: Without dead ends: 27890 [2021-11-21 01:25:56,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:56,162 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:56,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 54 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:25:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27890 states. [2021-11-21 01:25:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27890 to 26458. [2021-11-21 01:25:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26458 states, 26457 states have (on average 1.1939751294553427) internal successors, (31589), 26457 states have internal predecessors, (31589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26458 states to 26458 states and 31589 transitions. [2021-11-21 01:25:56,772 INFO L78 Accepts]: Start accepts. Automaton has 26458 states and 31589 transitions. Word has length 218 [2021-11-21 01:25:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:56,772 INFO L470 AbstractCegarLoop]: Abstraction has 26458 states and 31589 transitions. [2021-11-21 01:25:56,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 26458 states and 31589 transitions. [2021-11-21 01:25:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-21 01:25:56,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:56,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:25:56,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:25:56,803 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash 189647308, now seen corresponding path program 1 times [2021-11-21 01:25:56,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:56,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18703341] [2021-11-21 01:25:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:56,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:57,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:57,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18703341] [2021-11-21 01:25:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18703341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:57,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:57,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:25:57,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589426990] [2021-11-21 01:25:57,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:57,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:57,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:57,095 INFO L87 Difference]: Start difference. First operand 26458 states and 31589 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:57,944 INFO L93 Difference]: Finished difference Result 60494 states and 72126 transitions. [2021-11-21 01:25:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:57,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-11-21 01:25:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:58,014 INFO L225 Difference]: With dead ends: 60494 [2021-11-21 01:25:58,014 INFO L226 Difference]: Without dead ends: 34609 [2021-11-21 01:25:58,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:58,037 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:58,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 191 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:25:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34609 states. [2021-11-21 01:25:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34609 to 34609. [2021-11-21 01:25:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34609 states, 34608 states have (on average 1.1673312528895052) internal successors, (40399), 34608 states have internal predecessors, (40399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34609 states to 34609 states and 40399 transitions. [2021-11-21 01:25:58,849 INFO L78 Accepts]: Start accepts. Automaton has 34609 states and 40399 transitions. Word has length 239 [2021-11-21 01:25:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:58,849 INFO L470 AbstractCegarLoop]: Abstraction has 34609 states and 40399 transitions. [2021-11-21 01:25:58,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 34609 states and 40399 transitions. [2021-11-21 01:25:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-21 01:25:58,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:58,884 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:25:58,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:25:58,884 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:58,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1006210687, now seen corresponding path program 1 times [2021-11-21 01:25:58,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:58,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344266226] [2021-11-21 01:25:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:58,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 117 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:25:59,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:59,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344266226] [2021-11-21 01:25:59,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344266226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:59,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607700158] [2021-11-21 01:25:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:59,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:59,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:59,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:59,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:25:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:59,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:25:59,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 01:25:59,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:59,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607700158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:59,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:59,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:25:59,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982208311] [2021-11-21 01:25:59,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:59,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:59,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:59,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:59,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:59,876 INFO L87 Difference]: Start difference. First operand 34609 states and 40399 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:00,696 INFO L93 Difference]: Finished difference Result 72363 states and 85442 transitions. [2021-11-21 01:26:00,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-11-21 01:26:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:00,760 INFO L225 Difference]: With dead ends: 72363 [2021-11-21 01:26:00,760 INFO L226 Difference]: Without dead ends: 38327 [2021-11-21 01:26:00,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:00,781 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:00,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 175 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:26:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38327 states. [2021-11-21 01:26:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38327 to 38041. [2021-11-21 01:26:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38041 states, 38040 states have (on average 1.1827549947423766) internal successors, (44992), 38040 states have internal predecessors, (44992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38041 states to 38041 states and 44992 transitions. [2021-11-21 01:26:01,429 INFO L78 Accepts]: Start accepts. Automaton has 38041 states and 44992 transitions. Word has length 258 [2021-11-21 01:26:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:01,430 INFO L470 AbstractCegarLoop]: Abstraction has 38041 states and 44992 transitions. [2021-11-21 01:26:01,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 38041 states and 44992 transitions. [2021-11-21 01:26:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-21 01:26:01,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:01,635 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:26:01,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 01:26:01,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:26:01,857 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1186316352, now seen corresponding path program 1 times [2021-11-21 01:26:01,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:01,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525567888] [2021-11-21 01:26:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:01,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 01:26:01,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:01,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525567888] [2021-11-21 01:26:01,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525567888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:01,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:01,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:26:01,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285151530] [2021-11-21 01:26:01,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:01,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:01,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:01,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:01,977 INFO L87 Difference]: Start difference. First operand 38041 states and 44992 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:02,761 INFO L93 Difference]: Finished difference Result 81944 states and 97524 transitions. [2021-11-21 01:26:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-11-21 01:26:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:02,824 INFO L225 Difference]: With dead ends: 81944 [2021-11-21 01:26:02,824 INFO L226 Difference]: Without dead ends: 44476 [2021-11-21 01:26:02,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:02,845 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 149 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:02,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 199 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:26:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44476 states. [2021-11-21 01:26:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44476 to 43332. [2021-11-21 01:26:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43332 states, 43331 states have (on average 1.168724469779142) internal successors, (50642), 43331 states have internal predecessors, (50642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43332 states to 43332 states and 50642 transitions. [2021-11-21 01:26:03,663 INFO L78 Accepts]: Start accepts. Automaton has 43332 states and 50642 transitions. Word has length 292 [2021-11-21 01:26:03,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:03,664 INFO L470 AbstractCegarLoop]: Abstraction has 43332 states and 50642 transitions. [2021-11-21 01:26:03,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 43332 states and 50642 transitions. [2021-11-21 01:26:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-21 01:26:03,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:03,761 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:26:03,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:26:03,762 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash -429241737, now seen corresponding path program 1 times [2021-11-21 01:26:03,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:03,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704924519] [2021-11-21 01:26:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:03,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 154 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:04,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:04,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704924519] [2021-11-21 01:26:04,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704924519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:04,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718955370] [2021-11-21 01:26:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:04,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:04,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:04,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:26:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:04,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:26:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:05,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:26:05,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718955370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:05,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:26:05,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-21 01:26:05,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682003012] [2021-11-21 01:26:05,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:05,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:05,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:05,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:26:05,451 INFO L87 Difference]: Start difference. First operand 43332 states and 50642 transitions. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:06,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:06,666 INFO L93 Difference]: Finished difference Result 96816 states and 113027 transitions. [2021-11-21 01:26:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:06,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 298 [2021-11-21 01:26:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:06,747 INFO L225 Difference]: With dead ends: 96816 [2021-11-21 01:26:06,747 INFO L226 Difference]: Without dead ends: 54200 [2021-11-21 01:26:06,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:26:06,772 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 196 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:06,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 64 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:26:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54200 states. [2021-11-21 01:26:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54200 to 52913. [2021-11-21 01:26:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52913 states, 52912 states have (on average 1.1389854853341397) internal successors, (60266), 52912 states have internal predecessors, (60266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52913 states to 52913 states and 60266 transitions. [2021-11-21 01:26:07,618 INFO L78 Accepts]: Start accepts. Automaton has 52913 states and 60266 transitions. Word has length 298 [2021-11-21 01:26:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:07,618 INFO L470 AbstractCegarLoop]: Abstraction has 52913 states and 60266 transitions. [2021-11-21 01:26:07,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 52913 states and 60266 transitions. [2021-11-21 01:26:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-21 01:26:07,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:07,662 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:26:07,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:26:07,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:26:07,882 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:07,883 INFO L85 PathProgramCache]: Analyzing trace with hash 956851396, now seen corresponding path program 1 times [2021-11-21 01:26:07,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:07,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403131215] [2021-11-21 01:26:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:07,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-21 01:26:07,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:07,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403131215] [2021-11-21 01:26:07,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403131215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:07,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454496611] [2021-11-21 01:26:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:07,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:07,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:08,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:26:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:08,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:08,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 01:26:10,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:26:10,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454496611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:10,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:26:10,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:26:10,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977633034] [2021-11-21 01:26:10,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:10,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:10,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:10,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:10,180 INFO L87 Difference]: Start difference. First operand 52913 states and 60266 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:11,096 INFO L93 Difference]: Finished difference Result 114262 states and 130308 transitions. [2021-11-21 01:26:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:11,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2021-11-21 01:26:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:11,189 INFO L225 Difference]: With dead ends: 114262 [2021-11-21 01:26:11,189 INFO L226 Difference]: Without dead ends: 62065 [2021-11-21 01:26:11,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:11,220 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:11,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 233 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:26:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62065 states. [2021-11-21 01:26:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62065 to 61779. [2021-11-21 01:26:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61779 states, 61778 states have (on average 1.1231991971251902) internal successors, (69389), 61778 states have internal predecessors, (69389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61779 states to 61779 states and 69389 transitions. [2021-11-21 01:26:12,458 INFO L78 Accepts]: Start accepts. Automaton has 61779 states and 69389 transitions. Word has length 305 [2021-11-21 01:26:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:12,458 INFO L470 AbstractCegarLoop]: Abstraction has 61779 states and 69389 transitions. [2021-11-21 01:26:12,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 61779 states and 69389 transitions. [2021-11-21 01:26:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-21 01:26:12,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:12,514 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:26:12,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 01:26:12,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:26:12,715 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:12,716 INFO L85 PathProgramCache]: Analyzing trace with hash -368397218, now seen corresponding path program 1 times [2021-11-21 01:26:12,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:12,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047790142] [2021-11-21 01:26:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:12,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 169 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:12,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047790142] [2021-11-21 01:26:12,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047790142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:12,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502342781] [2021-11-21 01:26:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:12,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:12,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:12,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:12,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:26:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:13,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:26:13,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:26:13,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502342781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:13,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:26:13,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-11-21 01:26:13,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995491777] [2021-11-21 01:26:13,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:13,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:13,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:26:13,742 INFO L87 Difference]: Start difference. First operand 61779 states and 69389 transitions. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:14,940 INFO L93 Difference]: Finished difference Result 122985 states and 138313 transitions. [2021-11-21 01:26:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:14,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2021-11-21 01:26:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:15,002 INFO L225 Difference]: With dead ends: 122985 [2021-11-21 01:26:15,003 INFO L226 Difference]: Without dead ends: 61922 [2021-11-21 01:26:15,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:26:15,030 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 216 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:15,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 183 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:26:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61922 states. [2021-11-21 01:26:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61922 to 58776. [2021-11-21 01:26:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58776 states, 58775 states have (on average 1.1047894512973202) internal successors, (64934), 58775 states have internal predecessors, (64934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58776 states to 58776 states and 64934 transitions. [2021-11-21 01:26:15,978 INFO L78 Accepts]: Start accepts. Automaton has 58776 states and 64934 transitions. Word has length 313 [2021-11-21 01:26:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:15,979 INFO L470 AbstractCegarLoop]: Abstraction has 58776 states and 64934 transitions. [2021-11-21 01:26:15,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 58776 states and 64934 transitions. [2021-11-21 01:26:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-21 01:26:16,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:16,325 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:26:16,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:16,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:26:16,526 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1854118609, now seen corresponding path program 1 times [2021-11-21 01:26:16,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145787987] [2021-11-21 01:26:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:16,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 233 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:26:16,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:16,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145787987] [2021-11-21 01:26:16,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145787987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:16,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165440835] [2021-11-21 01:26:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:16,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:16,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:16,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:16,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:26:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:26:16,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 01:26:17,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:26:17,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165440835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:17,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:26:17,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-21 01:26:17,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011362221] [2021-11-21 01:26:17,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:17,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:17,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:17,545 INFO L87 Difference]: Start difference. First operand 58776 states and 64934 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:18,251 INFO L93 Difference]: Finished difference Result 145867 states and 160948 transitions. [2021-11-21 01:26:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-11-21 01:26:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:18,345 INFO L225 Difference]: With dead ends: 145867 [2021-11-21 01:26:18,346 INFO L226 Difference]: Without dead ends: 87807 [2021-11-21 01:26:18,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:18,381 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 156 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:18,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 460 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:26:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87807 states. [2021-11-21 01:26:19,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87807 to 85088. [2021-11-21 01:26:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85088 states, 85087 states have (on average 1.0944092517070763) internal successors, (93120), 85087 states have internal predecessors, (93120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85088 states to 85088 states and 93120 transitions. [2021-11-21 01:26:19,859 INFO L78 Accepts]: Start accepts. Automaton has 85088 states and 93120 transitions. Word has length 324 [2021-11-21 01:26:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:19,859 INFO L470 AbstractCegarLoop]: Abstraction has 85088 states and 93120 transitions. [2021-11-21 01:26:19,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 85088 states and 93120 transitions. [2021-11-21 01:26:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-21 01:26:19,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:19,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:26:19,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:20,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:26:20,117 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1518060826, now seen corresponding path program 1 times [2021-11-21 01:26:20,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:20,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668300788] [2021-11-21 01:26:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:20,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-21 01:26:20,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:20,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668300788] [2021-11-21 01:26:20,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668300788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:20,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:20,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:26:20,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112206659] [2021-11-21 01:26:20,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:20,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:20,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:20,236 INFO L87 Difference]: Start difference. First operand 85088 states and 93120 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:21,440 INFO L93 Difference]: Finished difference Result 169603 states and 185635 transitions. [2021-11-21 01:26:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:21,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2021-11-21 01:26:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:21,529 INFO L225 Difference]: With dead ends: 169603 [2021-11-21 01:26:21,529 INFO L226 Difference]: Without dead ends: 85231 [2021-11-21 01:26:21,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:21,563 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:21,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 80 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:26:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85231 states. [2021-11-21 01:26:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85231 to 85231. [2021-11-21 01:26:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85231 states, 85230 states have (on average 1.094332981344597) internal successors, (93270), 85230 states have internal predecessors, (93270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85231 states to 85231 states and 93270 transitions. [2021-11-21 01:26:23,043 INFO L78 Accepts]: Start accepts. Automaton has 85231 states and 93270 transitions. Word has length 325 [2021-11-21 01:26:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:23,043 INFO L470 AbstractCegarLoop]: Abstraction has 85231 states and 93270 transitions. [2021-11-21 01:26:23,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 85231 states and 93270 transitions. [2021-11-21 01:26:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-21 01:26:23,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:23,479 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:26:23,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:26:23,479 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash -906920781, now seen corresponding path program 1 times [2021-11-21 01:26:23,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:23,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583824661] [2021-11-21 01:26:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:23,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-21 01:26:23,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:23,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583824661] [2021-11-21 01:26:23,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583824661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:23,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393964036] [2021-11-21 01:26:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:23,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:23,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:23,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:23,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:26:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:23,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:26:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-21 01:26:24,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:26:24,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393964036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:24,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:26:24,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:26:24,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028434152] [2021-11-21 01:26:24,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:24,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:24,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:24,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:24,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:24,433 INFO L87 Difference]: Start difference. First operand 85231 states and 93270 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:26,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:26,161 INFO L93 Difference]: Finished difference Result 228092 states and 249468 transitions. [2021-11-21 01:26:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:26,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2021-11-21 01:26:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:26,342 INFO L225 Difference]: With dead ends: 228092 [2021-11-21 01:26:26,342 INFO L226 Difference]: Without dead ends: 143720 [2021-11-21 01:26:26,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:26,364 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 333 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:26,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 251 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:26:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143720 states. [2021-11-21 01:26:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143720 to 138284. [2021-11-21 01:26:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138284 states, 138283 states have (on average 1.094472928704179) internal successors, (151347), 138283 states have internal predecessors, (151347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138284 states to 138284 states and 151347 transitions. [2021-11-21 01:26:28,789 INFO L78 Accepts]: Start accepts. Automaton has 138284 states and 151347 transitions. Word has length 330 [2021-11-21 01:26:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:28,789 INFO L470 AbstractCegarLoop]: Abstraction has 138284 states and 151347 transitions. [2021-11-21 01:26:28,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 138284 states and 151347 transitions. [2021-11-21 01:26:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-21 01:26:28,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:28,830 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:26:28,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:29,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c03be71-94a8-4f6c-b7c7-e74292df1a25/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:29,038 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:29,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1163146312, now seen corresponding path program 1 times [2021-11-21 01:26:29,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:29,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090129680] [2021-11-21 01:26:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:29,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:26:29,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:29,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090129680] [2021-11-21 01:26:29,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090129680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:29,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:29,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:26:29,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099032536] [2021-11-21 01:26:29,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:29,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:29,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:29,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:29,223 INFO L87 Difference]: Start difference. First operand 138284 states and 151347 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:31,200 INFO L93 Difference]: Finished difference Result 342492 states and 374045 transitions. [2021-11-21 01:26:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:31,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2021-11-21 01:26:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:31,464 INFO L225 Difference]: With dead ends: 342492 [2021-11-21 01:26:31,464 INFO L226 Difference]: Without dead ends: 205067 [2021-11-21 01:26:31,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:31,524 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 93 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:31,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 199 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:26:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205067 states. [2021-11-21 01:26:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205067 to 203492. [2021-11-21 01:26:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203492 states, 203491 states have (on average 1.0867016231676094) internal successors, (221134), 203491 states have internal predecessors, (221134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203492 states to 203492 states and 221134 transitions. [2021-11-21 01:26:35,730 INFO L78 Accepts]: Start accepts. Automaton has 203492 states and 221134 transitions. Word has length 330 [2021-11-21 01:26:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:35,730 INFO L470 AbstractCegarLoop]: Abstraction has 203492 states and 221134 transitions. [2021-11-21 01:26:35,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 203492 states and 221134 transitions. [2021-11-21 01:26:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-11-21 01:26:35,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:35,838 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:26:35,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 01:26:35,840 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:35,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:35,841 INFO L85 PathProgramCache]: Analyzing trace with hash 22150206, now seen corresponding path program 1 times [2021-11-21 01:26:35,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:35,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917987612] [2021-11-21 01:26:35,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:35,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-21 01:26:36,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:36,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917987612] [2021-11-21 01:26:36,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917987612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:36,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:36,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:26:36,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700950113] [2021-11-21 01:26:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:36,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:36,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:36,118 INFO L87 Difference]: Start difference. First operand 203492 states and 221134 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:38,135 INFO L93 Difference]: Finished difference Result 404981 states and 440795 transitions. [2021-11-21 01:26:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:38,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 343 [2021-11-21 01:26:38,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:38,451 INFO L225 Difference]: With dead ends: 404981 [2021-11-21 01:26:38,451 INFO L226 Difference]: Without dead ends: 202348 [2021-11-21 01:26:38,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:38,544 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 129 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:38,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 242 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:26:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202348 states. [2021-11-21 01:26:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202348 to 197486. [2021-11-21 01:26:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197486 states, 197485 states have (on average 1.0865128997139024) internal successors, (214570), 197485 states have internal predecessors, (214570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)