./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_14-1.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_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/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_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_14-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/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_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/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 1e1f6c8a80d54f6d4b7b413368cc99af6eca243b930331d178961d851b56afbd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:38:38,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:38:38,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:38:38,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:38:38,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:38:38,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:38:38,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:38:38,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:38:38,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:38:38,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:38:38,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:38:38,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:38:38,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:38:38,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:38:38,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:38:38,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:38:38,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:38:38,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:38:38,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:38:38,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:38:38,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:38:38,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:38:38,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:38:38,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:38:38,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:38:38,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:38:38,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:38:38,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:38:38,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:38:38,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:38:38,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:38:38,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:38:38,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:38:38,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:38:38,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:38:38,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:38:38,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:38:38,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:38:38,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:38:38,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:38:38,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:38:38,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:38:38,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:38:38,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:38:38,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:38:38,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:38:38,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:38:38,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:38:38,975 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:38:38,975 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:38:38,975 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:38:38,976 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:38:38,977 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:38:38,977 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:38:38,977 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:38:38,977 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:38:38,978 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:38:38,978 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:38:38,978 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:38:38,978 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:38:38,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:38:38,980 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:38:38,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:38:38,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:38:38,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:38:38,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:38:38,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:38:38,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:38:38,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:38:38,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:38:38,984 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:38:38,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:38:38,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:38:38,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:38:38,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:38:38,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:38:38,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:38:38,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:38:38,986 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:38:38,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:38:38,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:38:38,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:38:38,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:38:38,988 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_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e1f6c8a80d54f6d4b7b413368cc99af6eca243b930331d178961d851b56afbd [2021-11-21 01:38:39,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:38:39,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:38:39,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:38:39,356 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:38:39,357 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:38:39,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/locks/test_locks_14-1.c [2021-11-21 01:38:39,441 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/data/42589407e/85cd4b0f1a444e4a92629c9470afae64/FLAGfd60156d9 [2021-11-21 01:38:40,021 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:38:40,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/sv-benchmarks/c/locks/test_locks_14-1.c [2021-11-21 01:38:40,030 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/data/42589407e/85cd4b0f1a444e4a92629c9470afae64/FLAGfd60156d9 [2021-11-21 01:38:40,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/data/42589407e/85cd4b0f1a444e4a92629c9470afae64 [2021-11-21 01:38:40,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:38:40,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:38:40,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:38:40,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:38:40,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:38:40,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437f3c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40, skipping insertion in model container [2021-11-21 01:38:40,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:38:40,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:38:40,658 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_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2021-11-21 01:38:40,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:38:40,670 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:38:40,697 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_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2021-11-21 01:38:40,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:38:40,713 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:38:40,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40 WrapperNode [2021-11-21 01:38:40,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:38:40,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:38:40,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:38:40,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:38:40,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,761 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 182 [2021-11-21 01:38:40,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:38:40,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:38:40,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:38:40,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:38:40,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:38:40,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:38:40,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:38:40,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:38:40,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (1/1) ... [2021-11-21 01:38:40,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:38:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:38:40,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:38:40,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:38:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:38:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:38:40,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:38:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:38:40,961 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:38:40,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:38:41,198 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:38:41,297 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:38:41,298 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:38:41,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:38:41 BoogieIcfgContainer [2021-11-21 01:38:41,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:38:41,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:38:41,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:38:41,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:38:41,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:38:40" (1/3) ... [2021-11-21 01:38:41,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361f2cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:38:41, skipping insertion in model container [2021-11-21 01:38:41,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:38:40" (2/3) ... [2021-11-21 01:38:41,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361f2cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:38:41, skipping insertion in model container [2021-11-21 01:38:41,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:38:41" (3/3) ... [2021-11-21 01:38:41,309 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2021-11-21 01:38:41,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:38:41,314 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:38:41,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:38:41,431 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 01:38:41,431 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:38:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 34 states have (on average 1.911764705882353) internal successors, (65), 35 states have internal predecessors, (65), 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 01:38:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:38:41,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:41,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:38:41,472 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:41,478 INFO L85 PathProgramCache]: Analyzing trace with hash -96656291, now seen corresponding path program 1 times [2021-11-21 01:38:41,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:41,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271841420] [2021-11-21 01:38:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:41,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:41,838 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 01:38:41,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271841420] [2021-11-21 01:38:41,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271841420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:41,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:41,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:41,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642054107] [2021-11-21 01:38:41,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:41,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:41,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:41,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:41,884 INFO L87 Difference]: Start difference. First operand has 36 states, 34 states have (on average 1.911764705882353) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 01:38:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:41,993 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-11-21 01:38:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:41,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-11-21 01:38:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:42,010 INFO L225 Difference]: With dead ends: 74 [2021-11-21 01:38:42,010 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 01:38:42,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,021 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 59 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:42,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 174 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 01:38:42,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 33. [2021-11-21 01:38:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 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 01:38:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 59 transitions. [2021-11-21 01:38:42,083 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 59 transitions. Word has length 6 [2021-11-21 01:38:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:42,084 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 59 transitions. [2021-11-21 01:38:42,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 01:38:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 59 transitions. [2021-11-21 01:38:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:38:42,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:42,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:42,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:38:42,088 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1298834327, now seen corresponding path program 1 times [2021-11-21 01:38:42,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:42,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610806607] [2021-11-21 01:38:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:42,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:42,169 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 01:38:42,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:42,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610806607] [2021-11-21 01:38:42,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610806607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:42,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:42,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:42,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886884405] [2021-11-21 01:38:42,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:42,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:42,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:42,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,175 INFO L87 Difference]: Start difference. First operand 33 states and 59 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 01:38:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:42,204 INFO L93 Difference]: Finished difference Result 63 states and 111 transitions. [2021-11-21 01:38:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:42,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-21 01:38:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:42,207 INFO L225 Difference]: With dead ends: 63 [2021-11-21 01:38:42,207 INFO L226 Difference]: Without dead ends: 61 [2021-11-21 01:38:42,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,210 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 54 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:42,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 157 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-21 01:38:42,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2021-11-21 01:38:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:38:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 58 transitions. [2021-11-21 01:38:42,218 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 58 transitions. Word has length 7 [2021-11-21 01:38:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:42,219 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 58 transitions. [2021-11-21 01:38:42,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 01:38:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 58 transitions. [2021-11-21 01:38:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:38:42,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:42,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:42,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:38:42,221 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:42,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1609370866, now seen corresponding path program 1 times [2021-11-21 01:38:42,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:42,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938280414] [2021-11-21 01:38:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:42,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:42,279 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 01:38:42,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:42,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938280414] [2021-11-21 01:38:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938280414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:42,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:42,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:42,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893024210] [2021-11-21 01:38:42,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:42,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,282 INFO L87 Difference]: Start difference. First operand 33 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 01:38:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:42,308 INFO L93 Difference]: Finished difference Result 61 states and 106 transitions. [2021-11-21 01:38:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-11-21 01:38:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:42,310 INFO L225 Difference]: With dead ends: 61 [2021-11-21 01:38:42,311 INFO L226 Difference]: Without dead ends: 59 [2021-11-21 01:38:42,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,313 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 52 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:42,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 151 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-21 01:38:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 33. [2021-11-21 01:38:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:38:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 57 transitions. [2021-11-21 01:38:42,321 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 57 transitions. Word has length 8 [2021-11-21 01:38:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:42,321 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 57 transitions. [2021-11-21 01:38:42,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 01:38:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 57 transitions. [2021-11-21 01:38:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:38:42,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:42,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:42,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:38:42,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1648897972, now seen corresponding path program 1 times [2021-11-21 01:38:42,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:42,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59872533] [2021-11-21 01:38:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:42,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:42,385 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 01:38:42,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:42,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59872533] [2021-11-21 01:38:42,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59872533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:42,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:42,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:42,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846455686] [2021-11-21 01:38:42,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:42,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:42,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:42,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:42,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,389 INFO L87 Difference]: Start difference. First operand 33 states and 57 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 01:38:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:42,423 INFO L93 Difference]: Finished difference Result 59 states and 101 transitions. [2021-11-21 01:38:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:42,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-11-21 01:38:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:42,425 INFO L225 Difference]: With dead ends: 59 [2021-11-21 01:38:42,428 INFO L226 Difference]: Without dead ends: 57 [2021-11-21 01:38:42,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,430 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 50 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:42,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 146 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:42,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-21 01:38:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2021-11-21 01:38:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:38:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-11-21 01:38:42,448 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 9 [2021-11-21 01:38:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:42,449 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-11-21 01:38:42,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 01:38:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-11-21 01:38:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:38:42,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:42,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:42,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:38:42,452 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash 423983495, now seen corresponding path program 1 times [2021-11-21 01:38:42,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:42,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003513061] [2021-11-21 01:38:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:42,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:42,557 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 01:38:42,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:42,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003513061] [2021-11-21 01:38:42,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003513061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:42,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:42,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:42,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760137299] [2021-11-21 01:38:42,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:42,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:42,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:42,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,564 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 01:38:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:42,615 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2021-11-21 01:38:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:42,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-21 01:38:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:42,617 INFO L225 Difference]: With dead ends: 57 [2021-11-21 01:38:42,618 INFO L226 Difference]: Without dead ends: 55 [2021-11-21 01:38:42,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,620 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:42,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 139 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:42,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-21 01:38:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-11-21 01:38:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:38:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 55 transitions. [2021-11-21 01:38:42,627 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 55 transitions. Word has length 10 [2021-11-21 01:38:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:42,627 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 55 transitions. [2021-11-21 01:38:42,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 01:38:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 55 transitions. [2021-11-21 01:38:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:38:42,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:42,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:42,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:38:42,629 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:42,630 INFO L85 PathProgramCache]: Analyzing trace with hash 258799873, now seen corresponding path program 1 times [2021-11-21 01:38:42,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:42,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220824253] [2021-11-21 01:38:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:42,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:42,700 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 01:38:42,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:42,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220824253] [2021-11-21 01:38:42,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220824253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:42,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:42,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:42,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962480848] [2021-11-21 01:38:42,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:42,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:42,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:42,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:42,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,713 INFO L87 Difference]: Start difference. First operand 33 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 01:38:42,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:42,742 INFO L93 Difference]: Finished difference Result 55 states and 91 transitions. [2021-11-21 01:38:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:42,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-11-21 01:38:42,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:42,744 INFO L225 Difference]: With dead ends: 55 [2021-11-21 01:38:42,744 INFO L226 Difference]: Without dead ends: 53 [2021-11-21 01:38:42,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,748 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:42,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 134 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-21 01:38:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2021-11-21 01:38:42,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:38:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 54 transitions. [2021-11-21 01:38:42,761 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 54 transitions. Word has length 11 [2021-11-21 01:38:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:42,761 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 54 transitions. [2021-11-21 01:38:42,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 01:38:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 54 transitions. [2021-11-21 01:38:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:38:42,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:42,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:42,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:38:42,765 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash -566924772, now seen corresponding path program 1 times [2021-11-21 01:38:42,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:42,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455743067] [2021-11-21 01:38:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:42,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:42,872 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 01:38:42,873 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:42,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455743067] [2021-11-21 01:38:42,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455743067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:42,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:42,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:42,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013364744] [2021-11-21 01:38:42,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:42,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:42,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:42,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:42,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,875 INFO L87 Difference]: Start difference. First operand 33 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 01:38:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:42,895 INFO L93 Difference]: Finished difference Result 53 states and 86 transitions. [2021-11-21 01:38:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:42,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-11-21 01:38:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:42,896 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:38:42,897 INFO L226 Difference]: Without dead ends: 51 [2021-11-21 01:38:42,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,898 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:42,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 128 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-21 01:38:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2021-11-21 01:38:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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 01:38:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 53 transitions. [2021-11-21 01:38:42,903 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 53 transitions. Word has length 12 [2021-11-21 01:38:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:42,903 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 53 transitions. [2021-11-21 01:38:42,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 01:38:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 53 transitions. [2021-11-21 01:38:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:38:42,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:42,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:42,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:38:42,905 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:42,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:42,905 INFO L85 PathProgramCache]: Analyzing trace with hash -394584650, now seen corresponding path program 1 times [2021-11-21 01:38:42,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:42,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296678822] [2021-11-21 01:38:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:42,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:42,956 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 01:38:42,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:42,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296678822] [2021-11-21 01:38:42,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296678822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:42,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:42,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:42,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507152993] [2021-11-21 01:38:42,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:42,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:42,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:42,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,959 INFO L87 Difference]: Start difference. First operand 33 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 01:38:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:42,984 INFO L93 Difference]: Finished difference Result 51 states and 81 transitions. [2021-11-21 01:38:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:42,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-11-21 01:38:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:42,987 INFO L225 Difference]: With dead ends: 51 [2021-11-21 01:38:42,988 INFO L226 Difference]: Without dead ends: 49 [2021-11-21 01:38:42,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:42,991 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 42 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:42,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 122 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-21 01:38:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-11-21 01:38:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 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 01:38:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions. [2021-11-21 01:38:42,997 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 13 [2021-11-21 01:38:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:42,997 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 52 transitions. [2021-11-21 01:38:42,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 01:38:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions. [2021-11-21 01:38:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:38:42,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:42,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:42,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:38:42,999 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash 652992177, now seen corresponding path program 1 times [2021-11-21 01:38:43,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:43,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906471499] [2021-11-21 01:38:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:43,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:43,074 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 01:38:43,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:43,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906471499] [2021-11-21 01:38:43,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906471499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:43,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:43,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:43,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013917517] [2021-11-21 01:38:43,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:43,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:43,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:43,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:43,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,078 INFO L87 Difference]: Start difference. First operand 33 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 01:38:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:43,104 INFO L93 Difference]: Finished difference Result 49 states and 76 transitions. [2021-11-21 01:38:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-11-21 01:38:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:43,105 INFO L225 Difference]: With dead ends: 49 [2021-11-21 01:38:43,105 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 01:38:43,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,109 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 40 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:43,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 115 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 01:38:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-11-21 01:38:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 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 01:38:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 51 transitions. [2021-11-21 01:38:43,118 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 51 transitions. Word has length 14 [2021-11-21 01:38:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:43,118 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 51 transitions. [2021-11-21 01:38:43,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 01:38:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 51 transitions. [2021-11-21 01:38:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:38:43,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:43,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:43,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:38:43,120 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:43,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1231864213, now seen corresponding path program 1 times [2021-11-21 01:38:43,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:43,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832942231] [2021-11-21 01:38:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:43,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:43,195 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 01:38:43,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832942231] [2021-11-21 01:38:43,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832942231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:43,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:43,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:43,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485709798] [2021-11-21 01:38:43,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:43,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:43,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:43,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:43,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,198 INFO L87 Difference]: Start difference. First operand 33 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 01:38:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:43,223 INFO L93 Difference]: Finished difference Result 47 states and 71 transitions. [2021-11-21 01:38:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:43,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-11-21 01:38:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:43,225 INFO L225 Difference]: With dead ends: 47 [2021-11-21 01:38:43,225 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 01:38:43,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,231 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:43,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 110 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 01:38:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-11-21 01:38:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 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 01:38:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 50 transitions. [2021-11-21 01:38:43,242 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 50 transitions. Word has length 15 [2021-11-21 01:38:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:43,242 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 50 transitions. [2021-11-21 01:38:43,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 01:38:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 50 transitions. [2021-11-21 01:38:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:38:43,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:43,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:43,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:38:43,244 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 467130182, now seen corresponding path program 1 times [2021-11-21 01:38:43,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:43,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961185797] [2021-11-21 01:38:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:43,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:43,301 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 01:38:43,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:43,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961185797] [2021-11-21 01:38:43,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961185797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:43,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:43,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:43,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378328369] [2021-11-21 01:38:43,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:43,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:43,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:43,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,303 INFO L87 Difference]: Start difference. First operand 33 states and 50 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 01:38:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:43,341 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2021-11-21 01:38:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:43,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-11-21 01:38:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:43,342 INFO L225 Difference]: With dead ends: 45 [2021-11-21 01:38:43,343 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 01:38:43,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,344 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 36 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:43,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 104 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 01:38:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-11-21 01:38:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 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 01:38:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2021-11-21 01:38:43,347 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 16 [2021-11-21 01:38:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:43,347 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2021-11-21 01:38:43,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 01:38:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2021-11-21 01:38:43,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:38:43,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:43,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:43,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:38:43,349 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:43,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1596349216, now seen corresponding path program 1 times [2021-11-21 01:38:43,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:43,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108358407] [2021-11-21 01:38:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:43,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:43,422 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 01:38:43,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:43,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108358407] [2021-11-21 01:38:43,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108358407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:43,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:43,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:43,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734506378] [2021-11-21 01:38:43,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:43,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:43,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:43,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,424 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 01:38:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:43,454 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2021-11-21 01:38:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2021-11-21 01:38:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:43,456 INFO L225 Difference]: With dead ends: 43 [2021-11-21 01:38:43,456 INFO L226 Difference]: Without dead ends: 41 [2021-11-21 01:38:43,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,457 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:43,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-21 01:38:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-11-21 01:38:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 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 01:38:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 48 transitions. [2021-11-21 01:38:43,460 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 48 transitions. Word has length 17 [2021-11-21 01:38:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:43,460 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 48 transitions. [2021-11-21 01:38:43,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 01:38:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 48 transitions. [2021-11-21 01:38:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:38:43,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:43,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:43,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:38:43,461 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2052566053, now seen corresponding path program 1 times [2021-11-21 01:38:43,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:43,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261876560] [2021-11-21 01:38:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:43,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:43,521 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 01:38:43,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:43,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261876560] [2021-11-21 01:38:43,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261876560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:43,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:43,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:43,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761773811] [2021-11-21 01:38:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:43,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:43,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,523 INFO L87 Difference]: Start difference. First operand 33 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 01:38:43,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:43,540 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-11-21 01:38:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:43,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2021-11-21 01:38:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:43,541 INFO L225 Difference]: With dead ends: 41 [2021-11-21 01:38:43,541 INFO L226 Difference]: Without dead ends: 39 [2021-11-21 01:38:43,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,542 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:43,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 92 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-21 01:38:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-11-21 01:38:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 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 01:38:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2021-11-21 01:38:43,545 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 18 [2021-11-21 01:38:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:43,545 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2021-11-21 01:38:43,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 01:38:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2021-11-21 01:38:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:38:43,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:43,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:43,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:38:43,547 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash 795177941, now seen corresponding path program 1 times [2021-11-21 01:38:43,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:43,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578679638] [2021-11-21 01:38:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:43,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:43,590 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 01:38:43,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:43,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578679638] [2021-11-21 01:38:43,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578679638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:43,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:43,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:38:43,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885211418] [2021-11-21 01:38:43,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:43,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:38:43,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:38:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,592 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 01:38:43,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:43,607 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-11-21 01:38:43,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:38:43,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2021-11-21 01:38:43,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:43,608 INFO L225 Difference]: With dead ends: 35 [2021-11-21 01:38:43,608 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 01:38:43,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:38:43,609 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:43,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:38:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 01:38:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 01:38:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 01:38:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 01:38:43,611 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-11-21 01:38:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:43,611 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 01:38:43,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 01:38:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 01:38:43,612 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 01:38:43,614 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:38:43,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:38:43,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-21 01:38:43,624 INFO L861 garLoopResultBuilder]: At program point L217(lines 7 221) the Hoare annotation is: true [2021-11-21 01:38:43,624 INFO L858 garLoopResultBuilder]: For program point L151-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,624 INFO L858 garLoopResultBuilder]: For program point L201-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,624 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-21 01:38:43,624 INFO L858 garLoopResultBuilder]: For program point L152(line 152) no Hoare annotation was computed. [2021-11-21 01:38:43,625 INFO L858 garLoopResultBuilder]: For program point L202(line 202) no Hoare annotation was computed. [2021-11-21 01:38:43,625 INFO L858 garLoopResultBuilder]: For program point L186-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,625 INFO L861 garLoopResultBuilder]: At program point L220(lines 6 221) the Hoare annotation is: true [2021-11-21 01:38:43,625 INFO L858 garLoopResultBuilder]: For program point L187(line 187) no Hoare annotation was computed. [2021-11-21 01:38:43,625 INFO L858 garLoopResultBuilder]: For program point L55(lines 55 57) no Hoare annotation was computed. [2021-11-21 01:38:43,625 INFO L858 garLoopResultBuilder]: For program point L171-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,625 INFO L858 garLoopResultBuilder]: For program point L172(line 172) no Hoare annotation was computed. [2021-11-21 01:38:43,625 INFO L858 garLoopResultBuilder]: For program point L156-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,626 INFO L858 garLoopResultBuilder]: For program point L206-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,626 INFO L858 garLoopResultBuilder]: For program point L140-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,626 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-21 01:38:43,626 INFO L858 garLoopResultBuilder]: For program point L157(line 157) no Hoare annotation was computed. [2021-11-21 01:38:43,626 INFO L858 garLoopResultBuilder]: For program point L207(line 207) no Hoare annotation was computed. [2021-11-21 01:38:43,626 INFO L858 garLoopResultBuilder]: For program point L191-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,626 INFO L858 garLoopResultBuilder]: For program point L192(line 192) no Hoare annotation was computed. [2021-11-21 01:38:43,626 INFO L858 garLoopResultBuilder]: For program point L176-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,627 INFO L858 garLoopResultBuilder]: For program point L177(line 177) no Hoare annotation was computed. [2021-11-21 01:38:43,627 INFO L858 garLoopResultBuilder]: For program point L161-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,627 INFO L861 garLoopResultBuilder]: At program point L211-1(lines 53 216) the Hoare annotation is: true [2021-11-21 01:38:43,627 INFO L858 garLoopResultBuilder]: For program point L162(line 162) no Hoare annotation was computed. [2021-11-21 01:38:43,627 INFO L858 garLoopResultBuilder]: For program point L212(line 212) no Hoare annotation was computed. [2021-11-21 01:38:43,627 INFO L854 garLoopResultBuilder]: At program point L212-1(lines 7 221) the Hoare annotation is: false [2021-11-21 01:38:43,627 INFO L858 garLoopResultBuilder]: For program point L146-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,627 INFO L858 garLoopResultBuilder]: For program point L196-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,628 INFO L858 garLoopResultBuilder]: For program point L147(line 147) no Hoare annotation was computed. [2021-11-21 01:38:43,628 INFO L858 garLoopResultBuilder]: For program point L197(line 197) no Hoare annotation was computed. [2021-11-21 01:38:43,628 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 219) no Hoare annotation was computed. [2021-11-21 01:38:43,628 INFO L858 garLoopResultBuilder]: For program point L181-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,628 INFO L858 garLoopResultBuilder]: For program point L182(line 182) no Hoare annotation was computed. [2021-11-21 01:38:43,628 INFO L858 garLoopResultBuilder]: For program point L166-1(lines 53 216) no Hoare annotation was computed. [2021-11-21 01:38:43,628 INFO L858 garLoopResultBuilder]: For program point L167(line 167) no Hoare annotation was computed. [2021-11-21 01:38:43,635 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:43,636 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:38:43,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:38:43 BoogieIcfgContainer [2021-11-21 01:38:43,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:38:43,657 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:38:43,657 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:38:43,657 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:38:43,658 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:38:41" (3/4) ... [2021-11-21 01:38:43,661 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-21 01:38:43,691 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-11-21 01:38:43,692 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-11-21 01:38:43,692 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-21 01:38:43,703 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-21 01:38:43,808 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:38:43,808 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:38:43,810 INFO L158 Benchmark]: Toolchain (without parser) took 3429.04ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 61.1MB in the beginning and 65.9MB in the end (delta: -4.8MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. [2021-11-21 01:38:43,810 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 96.5MB. Free memory was 67.1MB in the beginning and 67.0MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:38:43,812 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.73ms. Allocated memory is still 96.5MB. Free memory was 60.8MB in the beginning and 71.3MB in the end (delta: -10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:38:43,812 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.47ms. Allocated memory is still 96.5MB. Free memory was 71.3MB in the beginning and 69.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:38:43,813 INFO L158 Benchmark]: Boogie Preprocessor took 27.61ms. Allocated memory is still 96.5MB. Free memory was 69.5MB in the beginning and 68.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:38:43,814 INFO L158 Benchmark]: RCFGBuilder took 510.05ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 47.9MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-21 01:38:43,814 INFO L158 Benchmark]: TraceAbstraction took 2354.48ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 47.2MB in the beginning and 70.1MB in the end (delta: -22.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:38:43,815 INFO L158 Benchmark]: Witness Printer took 151.57ms. Allocated memory is still 117.4MB. Free memory was 70.1MB in the beginning and 65.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:38:43,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 96.5MB. Free memory was 67.1MB in the beginning and 67.0MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.73ms. Allocated memory is still 96.5MB. Free memory was 60.8MB in the beginning and 71.3MB in the end (delta: -10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.47ms. Allocated memory is still 96.5MB. Free memory was 71.3MB in the beginning and 69.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.61ms. Allocated memory is still 96.5MB. Free memory was 69.5MB in the beginning and 68.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 510.05ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 47.9MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 2354.48ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 47.2MB in the beginning and 70.1MB in the end (delta: -22.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 151.57ms. Allocated memory is still 117.4MB. Free memory was 70.1MB in the beginning and 65.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 219]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.2s, OverallIterations: 14, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 604 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 604 mSDsluCounter, 1753 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1074 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 179 IncrementalHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 682 mSDtfsCounter, 179 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 234 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 819 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-21 01:38:43,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb89be-1f5d-4fbe-a409-2ef1da544f7d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE