./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2c167c07c7c8ae18955c6e3f31a0546a95b1e5bbbf0436e33883fd95b03713cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:21:50,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:21:50,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:21:50,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:21:50,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:21:50,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:21:50,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:21:50,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:21:50,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:21:50,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:21:50,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:21:50,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:21:50,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:21:50,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:21:50,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:21:50,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:21:50,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:21:50,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:21:50,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:21:50,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:21:50,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:21:50,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:21:50,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:21:50,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:21:50,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:21:50,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:21:50,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:21:50,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:21:50,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:21:50,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:21:50,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:21:50,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:21:50,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:21:50,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:21:50,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:21:50,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:21:50,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:21:50,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:21:50,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:21:50,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:21:50,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:21:50,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:21:50,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:21:50,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:21:50,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:21:50,778 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:21:50,778 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:21:50,778 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:21:50,779 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:21:50,779 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:21:50,779 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:21:50,779 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:21:50,779 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:21:50,780 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:21:50,780 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:21:50,780 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:21:50,780 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:21:50,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:21:50,781 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:21:50,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:21:50,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:21:50,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:21:50,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:21:50,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:21:50,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:21:50,783 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:21:50,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:21:50,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:21:50,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:21:50,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:21:50,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:21:50,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:21:50,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:50,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:21:50,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:21:50,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:21:50,785 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:21:50,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:21:50,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:21:50,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:21:50,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:21:50,786 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_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c167c07c7c8ae18955c6e3f31a0546a95b1e5bbbf0436e33883fd95b03713cb [2021-11-03 04:21:51,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:21:51,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:21:51,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:21:51,069 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:21:51,072 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:21:51,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-11-03 04:21:51,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/data/da0cb914e/55be10048de942768dc49f8451e6195a/FLAG7dd880753 [2021-11-03 04:21:51,920 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:21:51,920 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-11-03 04:21:51,964 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/data/da0cb914e/55be10048de942768dc49f8451e6195a/FLAG7dd880753 [2021-11-03 04:21:52,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/data/da0cb914e/55be10048de942768dc49f8451e6195a [2021-11-03 04:21:52,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:21:52,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:21:52,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:52,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:21:52,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:21:52,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:52" (1/1) ... [2021-11-03 04:21:52,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9df69f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:52, skipping insertion in model container [2021-11-03 04:21:52,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:52" (1/1) ... [2021-11-03 04:21:52,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:21:52,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:53,008 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c[20609,20622] [2021-11-03 04:21:53,066 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c[27427,27440] [2021-11-03 04:21:54,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:54,113 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:21:54,184 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c[20609,20622] [2021-11-03 04:21:54,227 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c[27427,27440] [2021-11-03 04:21:54,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:54,830 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:21:54,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54 WrapperNode [2021-11-03 04:21:54,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:54,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:21:54,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:21:54,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:21:54,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:54,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:55,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:21:55,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:21:55,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:21:55,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:21:55,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:55,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:55,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:55,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:55,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:55,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:55,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:55,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:21:55,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:21:55,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:21:55,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:21:55,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:55,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:55,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:21:55,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:21:55,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:21:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:21:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:21:55,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:21:55,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:35:21,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:35:21,489 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2021-11-03 04:35:21,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:35:21 BoogieIcfgContainer [2021-11-03 04:35:21,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:35:21,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:35:21,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:35:21,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:35:21,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:21:52" (1/3) ... [2021-11-03 04:35:21,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a62455b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:35:21, skipping insertion in model container [2021-11-03 04:35:21,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54" (2/3) ... [2021-11-03 04:35:21,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a62455b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:35:21, skipping insertion in model container [2021-11-03 04:35:21,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:35:21" (3/3) ... [2021-11-03 04:35:21,509 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-11-03 04:35:21,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:35:21,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 04:35:21,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:35:21,662 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:35:21,662 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 04:35:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:35:21,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:21,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:35:21,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:21,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash -174982561, now seen corresponding path program 1 times [2021-11-03 04:35:21,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:21,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637040289] [2021-11-03 04:35:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:21,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:22,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:22,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637040289] [2021-11-03 04:35:22,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637040289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:22,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:22,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:35:22,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405306704] [2021-11-03 04:35:22,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:35:22,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:35:22,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:35:22,173 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2021-11-03 04:35:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:22,969 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-11-03 04:35:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:35:22,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 [2021-11-03 04:35:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:22,980 INFO L225 Difference]: With dead ends: 45 [2021-11-03 04:35:22,980 INFO L226 Difference]: Without dead ends: 21 [2021-11-03 04:35:22,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:35:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-03 04:35:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-03 04:35:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-03 04:35:23,064 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 6 [2021-11-03 04:35:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:23,069 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-03 04:35:23,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2021-11-03 04:35:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-03 04:35:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 04:35:23,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:23,071 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:23,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:35:23,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1875434294, now seen corresponding path program 1 times [2021-11-03 04:35:23,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:23,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903653895] [2021-11-03 04:35:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:23,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:23,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:23,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903653895] [2021-11-03 04:35:23,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903653895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:23,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:23,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:23,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977606162] [2021-11-03 04:35:23,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:35:23,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:23,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:35:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:35:23,737 INFO L87 Difference]: Start difference. First operand 20 states and 24 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) [2021-11-03 04:35:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:23,923 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-11-03 04:35:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:35:23,925 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 [2021-11-03 04:35:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:23,926 INFO L225 Difference]: With dead ends: 39 [2021-11-03 04:35:23,927 INFO L226 Difference]: Without dead ends: 30 [2021-11-03 04:35:23,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:35:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-03 04:35:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-11-03 04:35:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-03 04:35:23,936 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 7 [2021-11-03 04:35:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:23,937 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-03 04:35:23,937 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) [2021-11-03 04:35:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-03 04:35:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:35:23,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:23,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:23,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:35:23,941 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1612925342, now seen corresponding path program 1 times [2021-11-03 04:35:23,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:23,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457932766] [2021-11-03 04:35:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:23,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:24,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:24,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457932766] [2021-11-03 04:35:24,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457932766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:24,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:24,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:24,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925508564] [2021-11-03 04:35:24,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:35:24,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:24,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:35:24,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:35:24,468 INFO L87 Difference]: Start difference. First operand 22 states and 26 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) [2021-11-03 04:35:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:24,621 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-03 04:35:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:35:24,623 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 [2021-11-03 04:35:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:24,624 INFO L225 Difference]: With dead ends: 39 [2021-11-03 04:35:24,624 INFO L226 Difference]: Without dead ends: 30 [2021-11-03 04:35:24,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:35:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-03 04:35:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-11-03 04:35:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-03 04:35:24,636 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 9 [2021-11-03 04:35:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:24,637 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-03 04:35:24,637 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) [2021-11-03 04:35:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-03 04:35:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:35:24,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:24,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:24,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:35:24,653 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1731970178, now seen corresponding path program 1 times [2021-11-03 04:35:24,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:24,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967383350] [2021-11-03 04:35:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:24,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:25,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:25,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967383350] [2021-11-03 04:35:25,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967383350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:25,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:25,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:25,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378221844] [2021-11-03 04:35:25,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:35:25,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:35:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:35:25,250 INFO L87 Difference]: Start difference. First operand 23 states and 27 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) [2021-11-03 04:35:25,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:25,407 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-11-03 04:35:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:35:25,408 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 [2021-11-03 04:35:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:25,408 INFO L225 Difference]: With dead ends: 39 [2021-11-03 04:35:25,409 INFO L226 Difference]: Without dead ends: 30 [2021-11-03 04:35:25,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:35:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-03 04:35:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-11-03 04:35:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-03 04:35:25,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-11-03 04:35:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:25,423 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-03 04:35:25,424 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) [2021-11-03 04:35:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-03 04:35:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:35:25,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:25,425 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:25,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:35:25,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1207774075, now seen corresponding path program 1 times [2021-11-03 04:35:25,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:25,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32750780] [2021-11-03 04:35:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:25,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:33,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:33,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32750780] [2021-11-03 04:35:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32750780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:35:33,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580222681] [2021-11-03 04:35:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:33,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:35:33,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:35:33,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:35:33,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6b622f-0df1-4695-bdce-57c044aa4504/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:35:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:35:34,514 INFO L286 TraceCheckSpWp]: Computing forward predicates...