./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.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_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/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_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/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_de0a2a8f-42e8-439c-8313-667a02e5d5da/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 944b5ec42c2162154ede6c802018109a010424c3110973822c2880295480d39e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:39:59,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:39:59,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:39:59,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:39:59,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:39:59,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:39:59,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:39:59,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:39:59,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:39:59,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:39:59,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:39:59,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:39:59,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:39:59,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:39:59,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:39:59,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:39:59,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:39:59,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:39:59,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:39:59,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:39:59,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:39:59,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:39:59,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:39:59,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:39:59,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:39:59,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:39:59,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:39:59,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:39:59,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:39:59,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:39:59,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:39:59,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:39:59,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:39:59,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:39:59,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:39:59,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:39:59,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:39:59,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:39:59,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:39:59,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:39:59,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:39:59,791 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:39:59,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:39:59,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:39:59,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:39:59,843 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:39:59,843 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:39:59,843 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:39:59,843 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:39:59,844 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:39:59,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:39:59,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:39:59,851 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:39:59,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:39:59,852 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:39:59,852 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:39:59,852 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:39:59,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:39:59,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:39:59,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:39:59,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:39:59,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:39:59,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:39:59,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:39:59,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:39:59,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:39:59,856 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:39:59,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:39:59,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:39:59,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:39:59,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:39:59,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:39:59,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:39:59,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:39:59,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:39:59,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:39:59,860 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:39:59,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:39:59,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:39:59,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:39:59,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:39:59,861 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_de0a2a8f-42e8-439c-8313-667a02e5d5da/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 944b5ec42c2162154ede6c802018109a010424c3110973822c2880295480d39e [2021-11-03 03:40:00,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:40:00,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:40:00,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:40:00,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:40:00,168 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:40:00,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2021-11-03 03:40:00,235 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/data/ac1d429f2/e8433e2144554f27aca22005007ee14e/FLAGd4c208f07 [2021-11-03 03:40:00,896 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:40:00,898 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2021-11-03 03:40:00,923 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/data/ac1d429f2/e8433e2144554f27aca22005007ee14e/FLAGd4c208f07 [2021-11-03 03:40:01,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/data/ac1d429f2/e8433e2144554f27aca22005007ee14e [2021-11-03 03:40:01,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:40:01,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:40:01,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:01,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:40:01,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:40:01,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:01" (1/1) ... [2021-11-03 03:40:01,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee11c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:01, skipping insertion in model container [2021-11-03 03:40:01,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:01" (1/1) ... [2021-11-03 03:40:01,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:40:01,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:40:01,768 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_de0a2a8f-42e8-439c-8313-667a02e5d5da/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.c[61047,61060] [2021-11-03 03:40:01,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:01,797 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:40:01,989 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_de0a2a8f-42e8-439c-8313-667a02e5d5da/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.c[61047,61060] [2021-11-03 03:40:01,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:02,009 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:40:02,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02 WrapperNode [2021-11-03 03:40:02,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:02,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:40:02,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:40:02,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:40:02,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:40:02,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:40:02,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:40:02,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:40:02,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:40:02,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:40:02,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:40:02,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:40:02,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (1/1) ... [2021-11-03 03:40:02,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:02,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:40:02,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:40:02,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:40:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:40:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:40:02,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:40:02,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:40:09,521 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:40:09,521 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-03 03:40:09,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:09 BoogieIcfgContainer [2021-11-03 03:40:09,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:40:09,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:40:09,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:40:09,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:40:09,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:40:01" (1/3) ... [2021-11-03 03:40:09,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71581ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:09, skipping insertion in model container [2021-11-03 03:40:09,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:02" (2/3) ... [2021-11-03 03:40:09,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71581ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:09, skipping insertion in model container [2021-11-03 03:40:09,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:09" (3/3) ... [2021-11-03 03:40:09,534 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2021-11-03 03:40:09,539 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:40:09,539 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:40:09,589 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:40:09,595 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 03:40:09,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:40:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 440 states, 438 states have (on average 1.7191780821917808) internal successors, (753), 439 states have internal predecessors, (753), 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 03:40:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 03:40:09,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:09,638 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:09,638 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:09,643 INFO L85 PathProgramCache]: Analyzing trace with hash -671060121, now seen corresponding path program 1 times [2021-11-03 03:40:09,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:09,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719717140] [2021-11-03 03:40:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:09,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:10,930 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 03:40:10,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:10,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719717140] [2021-11-03 03:40:10,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719717140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:10,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:10,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:40:10,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31009532] [2021-11-03 03:40:10,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:10,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:10,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:10,956 INFO L87 Difference]: Start difference. First operand has 440 states, 438 states have (on average 1.7191780821917808) internal successors, (753), 439 states have internal predecessors, (753), 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 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 03:40:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:11,199 INFO L93 Difference]: Finished difference Result 477 states and 819 transitions. [2021-11-03 03:40:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 126 [2021-11-03 03:40:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:11,216 INFO L225 Difference]: With dead ends: 477 [2021-11-03 03:40:11,217 INFO L226 Difference]: Without dead ends: 458 [2021-11-03 03:40:11,219 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 03:40:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-03 03:40:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 449. [2021-11-03 03:40:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7142857142857142) internal successors, (768), 448 states have internal predecessors, (768), 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 03:40:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 768 transitions. [2021-11-03 03:40:11,296 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 768 transitions. Word has length 126 [2021-11-03 03:40:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:11,297 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 768 transitions. [2021-11-03 03:40:11,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 03:40:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 768 transitions. [2021-11-03 03:40:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-03 03:40:11,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:11,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:11,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:40:11,303 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:11,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:11,304 INFO L85 PathProgramCache]: Analyzing trace with hash 598258950, now seen corresponding path program 1 times [2021-11-03 03:40:11,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:11,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96210675] [2021-11-03 03:40:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:11,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:11,655 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 03:40:11,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:11,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96210675] [2021-11-03 03:40:11,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96210675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:11,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:11,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:40:11,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52738725] [2021-11-03 03:40:11,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:11,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:11,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:11,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:11,661 INFO L87 Difference]: Start difference. First operand 449 states and 768 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 03:40:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:11,857 INFO L93 Difference]: Finished difference Result 480 states and 816 transitions. [2021-11-03 03:40:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:11,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 127 [2021-11-03 03:40:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:11,866 INFO L225 Difference]: With dead ends: 480 [2021-11-03 03:40:11,866 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 03:40:11,868 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 03:40:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 03:40:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 03:40:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7120535714285714) internal successors, (767), 448 states have internal predecessors, (767), 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 03:40:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 767 transitions. [2021-11-03 03:40:11,912 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 767 transitions. Word has length 127 [2021-11-03 03:40:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:11,915 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 767 transitions. [2021-11-03 03:40:11,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 03:40:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 767 transitions. [2021-11-03 03:40:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 03:40:11,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:11,929 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:11,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 03:40:11,929 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1297896240, now seen corresponding path program 1 times [2021-11-03 03:40:11,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:11,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308409758] [2021-11-03 03:40:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:11,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:12,339 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 03:40:12,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:12,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308409758] [2021-11-03 03:40:12,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308409758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:12,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:12,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:40:12,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690243019] [2021-11-03 03:40:12,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:12,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:12,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:12,357 INFO L87 Difference]: Start difference. First operand 449 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 03:40:12,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:12,500 INFO L93 Difference]: Finished difference Result 480 states and 815 transitions. [2021-11-03 03:40:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 128 [2021-11-03 03:40:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:12,505 INFO L225 Difference]: With dead ends: 480 [2021-11-03 03:40:12,506 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 03:40:12,507 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 03:40:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 03:40:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 03:40:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7098214285714286) internal successors, (766), 448 states have internal predecessors, (766), 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 03:40:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 766 transitions. [2021-11-03 03:40:12,525 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 766 transitions. Word has length 128 [2021-11-03 03:40:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:12,526 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 766 transitions. [2021-11-03 03:40:12,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 03:40:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 766 transitions. [2021-11-03 03:40:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-03 03:40:12,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:12,529 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:12,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 03:40:12,530 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:12,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1517267503, now seen corresponding path program 1 times [2021-11-03 03:40:12,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:12,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344254954] [2021-11-03 03:40:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:12,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:12,817 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 03:40:12,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:12,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344254954] [2021-11-03 03:40:12,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344254954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:12,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:12,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:40:12,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042631790] [2021-11-03 03:40:12,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:12,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:12,821 INFO L87 Difference]: Start difference. First operand 449 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 03:40:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:12,957 INFO L93 Difference]: Finished difference Result 480 states and 814 transitions. [2021-11-03 03:40:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:12,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 129 [2021-11-03 03:40:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:12,961 INFO L225 Difference]: With dead ends: 480 [2021-11-03 03:40:12,961 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 03:40:12,962 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 03:40:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 03:40:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 03:40:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7075892857142858) internal successors, (765), 448 states have internal predecessors, (765), 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 03:40:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 765 transitions. [2021-11-03 03:40:12,980 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 765 transitions. Word has length 129 [2021-11-03 03:40:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:12,981 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 765 transitions. [2021-11-03 03:40:12,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 03:40:12,981 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 765 transitions. [2021-11-03 03:40:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-03 03:40:12,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:12,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:12,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 03:40:12,998 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -266706183, now seen corresponding path program 1 times [2021-11-03 03:40:12,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:12,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459485784] [2021-11-03 03:40:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:13,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:13,287 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 03:40:13,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:13,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459485784] [2021-11-03 03:40:13,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459485784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:13,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:13,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:40:13,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964399544] [2021-11-03 03:40:13,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:13,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:13,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:13,290 INFO L87 Difference]: Start difference. First operand 449 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 03:40:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:13,428 INFO L93 Difference]: Finished difference Result 480 states and 813 transitions. [2021-11-03 03:40:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:13,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 130 [2021-11-03 03:40:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:13,432 INFO L225 Difference]: With dead ends: 480 [2021-11-03 03:40:13,433 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 03:40:13,433 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 03:40:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 03:40:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 03:40:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7053571428571428) internal successors, (764), 448 states have internal predecessors, (764), 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 03:40:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 764 transitions. [2021-11-03 03:40:13,448 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 764 transitions. Word has length 130 [2021-11-03 03:40:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:13,449 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 764 transitions. [2021-11-03 03:40:13,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 03:40:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 764 transitions. [2021-11-03 03:40:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 03:40:13,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:13,451 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:13,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 03:40:13,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash 270136152, now seen corresponding path program 1 times [2021-11-03 03:40:13,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:13,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917220457] [2021-11-03 03:40:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:13,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:13,696 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 03:40:13,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:13,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917220457] [2021-11-03 03:40:13,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917220457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:13,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:13,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:40:13,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470519299] [2021-11-03 03:40:13,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:13,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:13,699 INFO L87 Difference]: Start difference. First operand 449 states and 764 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 03:40:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:13,820 INFO L93 Difference]: Finished difference Result 480 states and 812 transitions. [2021-11-03 03:40:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 131 [2021-11-03 03:40:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:13,824 INFO L225 Difference]: With dead ends: 480 [2021-11-03 03:40:13,825 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 03:40:13,825 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 03:40:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 03:40:13,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 03:40:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.703125) internal successors, (763), 448 states have internal predecessors, (763), 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 03:40:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 763 transitions. [2021-11-03 03:40:13,840 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 763 transitions. Word has length 131 [2021-11-03 03:40:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:13,840 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 763 transitions. [2021-11-03 03:40:13,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 03:40:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 763 transitions. [2021-11-03 03:40:13,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 03:40:13,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:13,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:13,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 03:40:13,843 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash 423632032, now seen corresponding path program 1 times [2021-11-03 03:40:13,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:13,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037810036] [2021-11-03 03:40:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:13,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:15,027 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 03:40:15,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:15,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037810036] [2021-11-03 03:40:15,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037810036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:15,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:15,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:40:15,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037116042] [2021-11-03 03:40:15,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:15,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:15,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:15,030 INFO L87 Difference]: Start difference. First operand 449 states and 763 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 03:40:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:15,167 INFO L93 Difference]: Finished difference Result 478 states and 808 transitions. [2021-11-03 03:40:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 133 [2021-11-03 03:40:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:15,172 INFO L225 Difference]: With dead ends: 478 [2021-11-03 03:40:15,172 INFO L226 Difference]: Without dead ends: 458 [2021-11-03 03:40:15,173 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 03:40:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-03 03:40:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 450. [2021-11-03 03:40:15,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 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 03:40:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2021-11-03 03:40:15,188 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 133 [2021-11-03 03:40:15,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:15,189 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2021-11-03 03:40:15,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 03:40:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2021-11-03 03:40:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 03:40:15,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:15,192 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:15,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 03:40:15,192 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash 159588272, now seen corresponding path program 1 times [2021-11-03 03:40:15,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:15,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720768124] [2021-11-03 03:40:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:15,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:16,403 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 03:40:16,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:16,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720768124] [2021-11-03 03:40:16,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720768124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:16,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:16,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:40:16,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889670354] [2021-11-03 03:40:16,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:16,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:16,407 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 03:40:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:16,517 INFO L93 Difference]: Finished difference Result 479 states and 809 transitions. [2021-11-03 03:40:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:16,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 134 [2021-11-03 03:40:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:16,520 INFO L225 Difference]: With dead ends: 479 [2021-11-03 03:40:16,520 INFO L226 Difference]: Without dead ends: 459 [2021-11-03 03:40:16,520 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 03:40:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-03 03:40:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 452. [2021-11-03 03:40:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.6962305986696231) internal successors, (765), 451 states have internal predecessors, (765), 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 03:40:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 765 transitions. [2021-11-03 03:40:16,536 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 765 transitions. Word has length 134 [2021-11-03 03:40:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:16,537 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 765 transitions. [2021-11-03 03:40:16,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 03:40:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 765 transitions. [2021-11-03 03:40:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 03:40:16,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:16,539 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:16,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 03:40:16,540 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:16,540 INFO L85 PathProgramCache]: Analyzing trace with hash 253669686, now seen corresponding path program 1 times [2021-11-03 03:40:16,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:16,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579929082] [2021-11-03 03:40:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:16,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:17,051 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 03:40:17,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:17,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579929082] [2021-11-03 03:40:17,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579929082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:17,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:17,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:40:17,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251919584] [2021-11-03 03:40:17,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:17,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:17,054 INFO L87 Difference]: Start difference. First operand 452 states and 765 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 03:40:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:17,187 INFO L93 Difference]: Finished difference Result 479 states and 806 transitions. [2021-11-03 03:40:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:17,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 136 [2021-11-03 03:40:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:17,191 INFO L225 Difference]: With dead ends: 479 [2021-11-03 03:40:17,191 INFO L226 Difference]: Without dead ends: 459 [2021-11-03 03:40:17,192 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 03:40:17,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-03 03:40:17,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 453. [2021-11-03 03:40:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 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 03:40:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2021-11-03 03:40:17,210 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 136 [2021-11-03 03:40:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:17,210 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2021-11-03 03:40:17,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 03:40:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2021-11-03 03:40:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-03 03:40:17,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:17,213 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:17,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 03:40:17,214 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash -730713403, now seen corresponding path program 1 times [2021-11-03 03:40:17,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:17,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011026811] [2021-11-03 03:40:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:17,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:17,484 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 03:40:17,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:17,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011026811] [2021-11-03 03:40:17,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011026811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:17,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:17,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 03:40:17,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314527702] [2021-11-03 03:40:17,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:40:17,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:40:17,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:40:17,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:40:17,487 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 03:40:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:17,727 INFO L93 Difference]: Finished difference Result 501 states and 843 transitions. [2021-11-03 03:40:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:40:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 137 [2021-11-03 03:40:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:17,731 INFO L225 Difference]: With dead ends: 501 [2021-11-03 03:40:17,731 INFO L226 Difference]: Without dead ends: 481 [2021-11-03 03:40:17,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:40:17,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-03 03:40:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 456. [2021-11-03 03:40:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.687912087912088) internal successors, (768), 455 states have internal predecessors, (768), 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 03:40:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 768 transitions. [2021-11-03 03:40:17,748 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 768 transitions. Word has length 137 [2021-11-03 03:40:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:17,749 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 768 transitions. [2021-11-03 03:40:17,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 03:40:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 768 transitions. [2021-11-03 03:40:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-03 03:40:17,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:17,752 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:17,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 03:40:17,752 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:40:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:17,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1155733129, now seen corresponding path program 1 times [2021-11-03 03:40:17,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:40:17,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230660764] [2021-11-03 03:40:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:17,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:40:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:19,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:40:19,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230660764] [2021-11-03 03:40:19,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230660764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:40:19,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070085906] [2021-11-03 03:40:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:19,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:40:19,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:40:19,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:40:19,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de0a2a8f-42e8-439c-8313-667a02e5d5da/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 03:40:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 03:40:19,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:44:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:44:38,830 INFO L328 TraceCheckSpWp]: Computing backward predicates...