./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f3302497ea925232664f79330834ccdc9bbd9e62586cb93dfb7cf8f1101390c2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:35:51,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:35:51,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:35:51,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:35:51,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:35:51,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:35:51,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:35:51,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:35:51,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:35:51,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:35:51,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:35:51,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:35:51,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:35:51,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:35:51,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:35:51,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:35:51,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:35:51,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:35:51,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:35:51,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:35:51,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:35:51,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:35:51,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:35:51,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:35:51,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:35:51,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:35:51,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:35:51,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:35:51,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:35:51,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:35:51,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:35:51,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:35:51,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:35:51,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:35:51,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:35:51,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:35:51,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:35:51,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:35:51,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:35:51,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:35:51,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:35:51,778 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:35:51,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:35:51,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:35:51,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:35:51,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:35:51,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:35:51,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:35:51,827 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:35:51,828 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:35:51,828 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:35:51,828 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:35:51,828 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:35:51,829 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:35:51,829 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:35:51,829 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:35:51,829 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:35:51,830 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:35:51,830 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:35:51,830 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:35:51,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:35:51,831 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:35:51,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:35:51,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:35:51,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:35:51,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:35:51,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:35:51,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:35:51,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:35:51,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:35:51,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:35:51,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:35:51,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:35:51,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:35:51,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:35:51,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:35:51,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:35:51,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:35:51,835 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:35:51,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:35:51,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:35:51,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:35:51,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:35:51,836 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_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3302497ea925232664f79330834ccdc9bbd9e62586cb93dfb7cf8f1101390c2 [2021-11-21 00:35:52,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:35:52,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:35:52,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:35:52,170 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:35:52,171 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:35:52,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-21 00:35:52,258 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/data/73dd5169f/af2274740991476aadccb767bbc76257/FLAGb8ad454e4 [2021-11-21 00:35:52,868 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:35:52,869 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-21 00:35:52,890 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/data/73dd5169f/af2274740991476aadccb767bbc76257/FLAGb8ad454e4 [2021-11-21 00:35:53,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/data/73dd5169f/af2274740991476aadccb767bbc76257 [2021-11-21 00:35:53,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:35:53,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:35:53,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:35:53,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:35:53,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:35:53,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d3946e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53, skipping insertion in model container [2021-11-21 00:35:53,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:35:53,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:35:53,560 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2021-11-21 00:35:53,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:35:53,621 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:35:53,685 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2021-11-21 00:35:53,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:35:53,773 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:35:53,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53 WrapperNode [2021-11-21 00:35:53,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:35:53,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:35:53,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:35:53,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:35:53,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,876 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 607 [2021-11-21 00:35:53,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:35:53,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:35:53,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:35:53,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:35:53,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:35:53,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:35:53,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:35:53,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:35:53,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (1/1) ... [2021-11-21 00:35:53,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:35:53,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:53,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:35:54,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:35:54,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:35:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:35:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:35:54,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:35:54,179 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:35:54,181 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:35:54,978 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:35:55,179 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:35:55,179 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:35:55,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:35:55 BoogieIcfgContainer [2021-11-21 00:35:55,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:35:55,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:35:55,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:35:55,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:35:55,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:35:53" (1/3) ... [2021-11-21 00:35:55,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314fb4ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:35:55, skipping insertion in model container [2021-11-21 00:35:55,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:53" (2/3) ... [2021-11-21 00:35:55,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314fb4ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:35:55, skipping insertion in model container [2021-11-21 00:35:55,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:35:55" (3/3) ... [2021-11-21 00:35:55,197 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-21 00:35:55,209 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:35:55,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:35:55,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:35:55,267 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:35:55,267 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:35:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.6916666666666667) internal successors, (203), 121 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 00:35:55,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:55,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:55,302 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:55,308 INFO L85 PathProgramCache]: Analyzing trace with hash -265646700, now seen corresponding path program 1 times [2021-11-21 00:35:55,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:55,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556495386] [2021-11-21 00:35:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:55,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:35:55,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:55,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556495386] [2021-11-21 00:35:55,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556495386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:55,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:55,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:35:55,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380275034] [2021-11-21 00:35:55,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:55,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:35:55,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:55,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:35:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:55,896 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.6916666666666667) internal successors, (203), 121 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:56,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:56,039 INFO L93 Difference]: Finished difference Result 274 states and 430 transitions. [2021-11-21 00:35:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:35:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-21 00:35:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:56,055 INFO L225 Difference]: With dead ends: 274 [2021-11-21 00:35:56,055 INFO L226 Difference]: Without dead ends: 191 [2021-11-21 00:35:56,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:56,063 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 150 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:56,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 399 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:35:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-21 00:35:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2021-11-21 00:35:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.4042553191489362) internal successors, (264), 188 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 264 transitions. [2021-11-21 00:35:56,137 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 264 transitions. Word has length 58 [2021-11-21 00:35:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:56,147 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 264 transitions. [2021-11-21 00:35:56,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 264 transitions. [2021-11-21 00:35:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 00:35:56,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:56,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:56,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:35:56,157 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:56,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1158426643, now seen corresponding path program 1 times [2021-11-21 00:35:56,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:56,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415457946] [2021-11-21 00:35:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:56,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:35:56,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:56,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415457946] [2021-11-21 00:35:56,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415457946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:56,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:56,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:35:56,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093339205] [2021-11-21 00:35:56,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:56,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:35:56,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:56,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:35:56,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:56,386 INFO L87 Difference]: Start difference. First operand 189 states and 264 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:56,525 INFO L93 Difference]: Finished difference Result 459 states and 672 transitions. [2021-11-21 00:35:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:35:56,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2021-11-21 00:35:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:56,530 INFO L225 Difference]: With dead ends: 459 [2021-11-21 00:35:56,531 INFO L226 Difference]: Without dead ends: 313 [2021-11-21 00:35:56,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:56,538 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 109 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:56,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 329 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:35:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-21 00:35:56,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2021-11-21 00:35:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.4451612903225806) internal successors, (448), 310 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 448 transitions. [2021-11-21 00:35:56,624 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 448 transitions. Word has length 60 [2021-11-21 00:35:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:56,627 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 448 transitions. [2021-11-21 00:35:56,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 448 transitions. [2021-11-21 00:35:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 00:35:56,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:56,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:56,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:35:56,637 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:56,639 INFO L85 PathProgramCache]: Analyzing trace with hash -300420859, now seen corresponding path program 1 times [2021-11-21 00:35:56,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:56,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92693183] [2021-11-21 00:35:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:56,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:35:56,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:56,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92693183] [2021-11-21 00:35:56,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92693183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:56,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:56,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:35:56,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403941494] [2021-11-21 00:35:56,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:56,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:35:56,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:35:56,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:56,744 INFO L87 Difference]: Start difference. First operand 311 states and 448 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:56,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:56,830 INFO L93 Difference]: Finished difference Result 803 states and 1190 transitions. [2021-11-21 00:35:56,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:35:56,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-21 00:35:56,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:56,837 INFO L225 Difference]: With dead ends: 803 [2021-11-21 00:35:56,838 INFO L226 Difference]: Without dead ends: 535 [2021-11-21 00:35:56,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:56,842 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 104 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:56,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 314 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:35:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-21 00:35:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 533. [2021-11-21 00:35:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.4661654135338347) internal successors, (780), 532 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 780 transitions. [2021-11-21 00:35:56,965 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 780 transitions. Word has length 63 [2021-11-21 00:35:56,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:56,967 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 780 transitions. [2021-11-21 00:35:56,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 780 transitions. [2021-11-21 00:35:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:35:56,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:56,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:56,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:35:56,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1360438086, now seen corresponding path program 1 times [2021-11-21 00:35:56,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:56,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634366225] [2021-11-21 00:35:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:56,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:35:57,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634366225] [2021-11-21 00:35:57,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634366225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:57,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:57,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:35:57,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167875360] [2021-11-21 00:35:57,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:57,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:35:57,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:57,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:35:57,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:57,124 INFO L87 Difference]: Start difference. First operand 533 states and 780 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:57,256 INFO L93 Difference]: Finished difference Result 1425 states and 2118 transitions. [2021-11-21 00:35:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:35:57,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-21 00:35:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:57,267 INFO L225 Difference]: With dead ends: 1425 [2021-11-21 00:35:57,267 INFO L226 Difference]: Without dead ends: 935 [2021-11-21 00:35:57,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:57,281 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 99 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:57,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 299 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:35:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-11-21 00:35:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 933. [2021-11-21 00:35:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 1.4721030042918455) internal successors, (1372), 932 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1372 transitions. [2021-11-21 00:35:57,368 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1372 transitions. Word has length 66 [2021-11-21 00:35:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:57,371 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 1372 transitions. [2021-11-21 00:35:57,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:57,372 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1372 transitions. [2021-11-21 00:35:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 00:35:57,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:57,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:57,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:35:57,377 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2011020930, now seen corresponding path program 1 times [2021-11-21 00:35:57,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:57,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658586834] [2021-11-21 00:35:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:57,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:35:57,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:57,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658586834] [2021-11-21 00:35:57,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658586834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:57,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:57,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:35:57,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275981217] [2021-11-21 00:35:57,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:57,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:35:57,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:57,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:35:57,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:57,481 INFO L87 Difference]: Start difference. First operand 933 states and 1372 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:57,666 INFO L93 Difference]: Finished difference Result 2537 states and 3758 transitions. [2021-11-21 00:35:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:35:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2021-11-21 00:35:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:57,678 INFO L225 Difference]: With dead ends: 2537 [2021-11-21 00:35:57,679 INFO L226 Difference]: Without dead ends: 1647 [2021-11-21 00:35:57,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:57,686 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 94 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:57,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 284 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:35:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-11-21 00:35:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2021-11-21 00:35:57,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 1.467153284671533) internal successors, (2412), 1644 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2412 transitions. [2021-11-21 00:35:57,838 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2412 transitions. Word has length 69 [2021-11-21 00:35:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:57,841 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 2412 transitions. [2021-11-21 00:35:57,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2412 transitions. [2021-11-21 00:35:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 00:35:57,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:57,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:57,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:35:57,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1281413499, now seen corresponding path program 1 times [2021-11-21 00:35:57,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:57,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255597413] [2021-11-21 00:35:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:57,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:35:57,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:57,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255597413] [2021-11-21 00:35:57,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255597413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:57,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:57,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:35:57,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095238254] [2021-11-21 00:35:57,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:57,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:35:57,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:57,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:35:57,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:57,941 INFO L87 Difference]: Start difference. First operand 1645 states and 2412 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:58,252 INFO L93 Difference]: Finished difference Result 4497 states and 6606 transitions. [2021-11-21 00:35:58,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:35:58,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-21 00:35:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:58,272 INFO L225 Difference]: With dead ends: 4497 [2021-11-21 00:35:58,273 INFO L226 Difference]: Without dead ends: 2895 [2021-11-21 00:35:58,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:35:58,277 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 89 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:58,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 269 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:35:58,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-11-21 00:35:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2893. [2021-11-21 00:35:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2892 states have (on average 1.4536652835408022) internal successors, (4204), 2892 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 4204 transitions. [2021-11-21 00:35:58,563 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 4204 transitions. Word has length 72 [2021-11-21 00:35:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:58,563 INFO L470 AbstractCegarLoop]: Abstraction has 2893 states and 4204 transitions. [2021-11-21 00:35:58,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:35:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 4204 transitions. [2021-11-21 00:35:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 00:35:58,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:58,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:58,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:35:58,566 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash 309618100, now seen corresponding path program 1 times [2021-11-21 00:35:58,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:58,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723637745] [2021-11-21 00:35:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:58,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:35:58,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:58,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723637745] [2021-11-21 00:35:58,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723637745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:58,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:58,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 00:35:58,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414996646] [2021-11-21 00:35:58,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:58,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:35:58,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:35:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:35:58,810 INFO L87 Difference]: Start difference. First operand 2893 states and 4204 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:00,441 INFO L93 Difference]: Finished difference Result 17273 states and 25010 transitions. [2021-11-21 00:36:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:36:00,442 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 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 75 [2021-11-21 00:36:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:00,542 INFO L225 Difference]: With dead ends: 17273 [2021-11-21 00:36:00,542 INFO L226 Difference]: Without dead ends: 14423 [2021-11-21 00:36:00,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:36:00,551 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 689 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:00,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 971 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:36:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14423 states. [2021-11-21 00:36:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14423 to 14413. [2021-11-21 00:36:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14413 states, 14412 states have (on average 1.4440743824590618) internal successors, (20812), 14412 states have internal predecessors, (20812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 20812 transitions. [2021-11-21 00:36:02,189 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 20812 transitions. Word has length 75 [2021-11-21 00:36:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:02,189 INFO L470 AbstractCegarLoop]: Abstraction has 14413 states and 20812 transitions. [2021-11-21 00:36:02,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 20812 transitions. [2021-11-21 00:36:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 00:36:02,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:02,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:02,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:36:02,193 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1420828021, now seen corresponding path program 1 times [2021-11-21 00:36:02,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:02,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579958911] [2021-11-21 00:36:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:02,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:36:02,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579958911] [2021-11-21 00:36:02,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579958911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:02,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:36:02,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:36:02,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643444285] [2021-11-21 00:36:02,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:02,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:36:02,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:02,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:36:02,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:36:02,267 INFO L87 Difference]: Start difference. First operand 14413 states and 20812 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:04,866 INFO L93 Difference]: Finished difference Result 36894 states and 53486 transitions. [2021-11-21 00:36:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:36:04,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 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 77 [2021-11-21 00:36:04,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:04,981 INFO L225 Difference]: With dead ends: 36894 [2021-11-21 00:36:04,986 INFO L226 Difference]: Without dead ends: 22524 [2021-11-21 00:36:05,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:36:05,019 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 626 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:05,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 163 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:36:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22524 states. [2021-11-21 00:36:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22524 to 22522. [2021-11-21 00:36:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22522 states, 22521 states have (on average 1.4384796412237468) internal successors, (32396), 22521 states have internal predecessors, (32396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22522 states to 22522 states and 32396 transitions. [2021-11-21 00:36:06,942 INFO L78 Accepts]: Start accepts. Automaton has 22522 states and 32396 transitions. Word has length 77 [2021-11-21 00:36:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:06,943 INFO L470 AbstractCegarLoop]: Abstraction has 22522 states and 32396 transitions. [2021-11-21 00:36:06,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 22522 states and 32396 transitions. [2021-11-21 00:36:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 00:36:06,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:06,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:06,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:36:06,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:06,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1285066810, now seen corresponding path program 1 times [2021-11-21 00:36:06,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:06,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3703517] [2021-11-21 00:36:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:06,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:36:07,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:07,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3703517] [2021-11-21 00:36:07,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3703517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:07,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:36:07,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-21 00:36:07,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615725302] [2021-11-21 00:36:07,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:07,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:36:07,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:36:07,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:36:07,239 INFO L87 Difference]: Start difference. First operand 22522 states and 32396 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:11,482 INFO L93 Difference]: Finished difference Result 47456 states and 68789 transitions. [2021-11-21 00:36:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:36:11,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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 77 [2021-11-21 00:36:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:11,628 INFO L225 Difference]: With dead ends: 47456 [2021-11-21 00:36:11,628 INFO L226 Difference]: Without dead ends: 47454 [2021-11-21 00:36:11,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:36:11,644 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 1806 mSDsluCounter, 2850 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:11,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1806 Valid, 3351 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:36:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47454 states. [2021-11-21 00:36:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47454 to 23041. [2021-11-21 00:36:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23041 states, 23040 states have (on average 1.4389756944444445) internal successors, (33154), 23040 states have internal predecessors, (33154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23041 states to 23041 states and 33154 transitions. [2021-11-21 00:36:14,320 INFO L78 Accepts]: Start accepts. Automaton has 23041 states and 33154 transitions. Word has length 77 [2021-11-21 00:36:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:14,320 INFO L470 AbstractCegarLoop]: Abstraction has 23041 states and 33154 transitions. [2021-11-21 00:36:14,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:36:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 23041 states and 33154 transitions. [2021-11-21 00:36:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-21 00:36:14,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:14,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:14,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:36:14,327 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:14,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1852510427, now seen corresponding path program 1 times [2021-11-21 00:36:14,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:14,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128963423] [2021-11-21 00:36:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:14,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:36:15,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:15,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128963423] [2021-11-21 00:36:15,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128963423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:15,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243333940] [2021-11-21 00:36:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:15,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:15,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:15,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:15,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25f4e5e7-8934-49fd-aa32-9f7c98b9edcd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:36:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-21 00:36:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:36:21,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:37:48,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243333940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:37:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69883114] [2021-11-21 00:37:48,850 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2021-11-21 00:37:48,850 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:37:48,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:37:48,861 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:37:48,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:37:50,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:50,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-21 00:37:50,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:50,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:50,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:50,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:50,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:50,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31