./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh --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 b1a54cb791c5af35332ec00d8dfd3a394281252d9141996dd7e5974a534492ee --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:26:57,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:26:57,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:26:57,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:26:57,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:26:57,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:26:57,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:26:57,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:26:57,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:26:57,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:26:57,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:26:57,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:26:57,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:26:57,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:26:57,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:26:57,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:26:57,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:26:57,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:26:57,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:26:57,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:26:57,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:26:57,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:26:57,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:26:57,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:26:58,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:26:58,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:26:58,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:26:58,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:26:58,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:26:58,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:26:58,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:26:58,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:26:58,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:26:58,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:26:58,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:26:58,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:26:58,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:26:58,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:26:58,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:26:58,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:26:58,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:26:58,007 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:26:58,021 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:26:58,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:26:58,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:26:58,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:26:58,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:26:58,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:26:58,022 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:26:58,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:26:58,023 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:26:58,023 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:26:58,023 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:26:58,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:26:58,023 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:26:58,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:26:58,023 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:26:58,023 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:26:58,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:26:58,024 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:26:58,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:26:58,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:26:58,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:26:58,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:26:58,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:26:58,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:26:58,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:26:58,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:26:58,025 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:26:58,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:26:58,025 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:26:58,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:26:58,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:26:58,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:26:58,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:26:58,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:26:58,026 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:26:58,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:26:58,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:26:58,026 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:26:58,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:26:58,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:26:58,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:26:58,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1a54cb791c5af35332ec00d8dfd3a394281252d9141996dd7e5974a534492ee [2022-12-14 13:26:58,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:26:58,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:26:58,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:26:58,207 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:26:58,207 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:26:58,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2022-12-14 13:27:00,801 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:27:00,964 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:27:00,965 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2022-12-14 13:27:00,971 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/data/ab1c81267/bdff5218d95641429d5247a2f172ba9f/FLAG3d6d13097 [2022-12-14 13:27:01,384 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/data/ab1c81267/bdff5218d95641429d5247a2f172ba9f [2022-12-14 13:27:01,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:27:01,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:27:01,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:27:01,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:27:01,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:27:01,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@452bef14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01, skipping insertion in model container [2022-12-14 13:27:01,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:27:01,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:27:01,597 WARN L237 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_720c3a65-290e-4ca0-9664-62835bc2427c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[6694,6707] [2022-12-14 13:27:01,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:27:01,633 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:27:01,667 WARN L237 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_720c3a65-290e-4ca0-9664-62835bc2427c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[6694,6707] [2022-12-14 13:27:01,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:27:01,703 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:27:01,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01 WrapperNode [2022-12-14 13:27:01,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:27:01,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:27:01,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:27:01,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:27:01,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,742 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 495 [2022-12-14 13:27:01,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:27:01,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:27:01,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:27:01,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:27:01,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,765 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:27:01,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:27:01,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:27:01,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:27:01,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (1/1) ... [2022-12-14 13:27:01,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:27:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:27:01,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:27:01,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:27:01,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:27:01,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:27:01,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:27:01,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:27:01,919 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:27:01,921 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:27:02,315 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:27:02,428 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:27:02,429 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 13:27:02,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:27:02 BoogieIcfgContainer [2022-12-14 13:27:02,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:27:02,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:27:02,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:27:02,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:27:02,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:27:01" (1/3) ... [2022-12-14 13:27:02,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b231467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:27:02, skipping insertion in model container [2022-12-14 13:27:02,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:27:01" (2/3) ... [2022-12-14 13:27:02,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b231467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:27:02, skipping insertion in model container [2022-12-14 13:27:02,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:27:02" (3/3) ... [2022-12-14 13:27:02,440 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2022-12-14 13:27:02,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:27:02,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:27:02,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:27:02,497 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60eae51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:27:02,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:27:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 87 states have (on average 1.7586206896551724) internal successors, (153), 89 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:02,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 13:27:02,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:02,507 INFO L195 NwaCegarLoop]: 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] [2022-12-14 13:27:02,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:02,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1345585983, now seen corresponding path program 1 times [2022-12-14 13:27:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:02,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550651978] [2022-12-14 13:27:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:02,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:02,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550651978] [2022-12-14 13:27:02,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550651978] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:02,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:02,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:27:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966682125] [2022-12-14 13:27:02,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:02,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:27:02,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:27:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:27:02,919 INFO L87 Difference]: Start difference. First operand has 90 states, 87 states have (on average 1.7586206896551724) internal successors, (153), 89 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:03,001 INFO L93 Difference]: Finished difference Result 182 states and 287 transitions. [2022-12-14 13:27:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:27:03,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-14 13:27:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:03,010 INFO L225 Difference]: With dead ends: 182 [2022-12-14 13:27:03,010 INFO L226 Difference]: Without dead ends: 128 [2022-12-14 13:27:03,012 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:03,014 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 102 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:03,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 256 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-14 13:27:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-12-14 13:27:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.328) internal successors, (166), 125 states have internal predecessors, (166), 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) [2022-12-14 13:27:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2022-12-14 13:27:03,047 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 59 [2022-12-14 13:27:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:03,048 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2022-12-14 13:27:03,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:03,048 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2022-12-14 13:27:03,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 13:27:03,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:03,049 INFO L195 NwaCegarLoop]: 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] [2022-12-14 13:27:03,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:27:03,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash -17147218, now seen corresponding path program 1 times [2022-12-14 13:27:03,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:03,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297468375] [2022-12-14 13:27:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:03,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:03,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:03,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297468375] [2022-12-14 13:27:03,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297468375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:03,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:03,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:27:03,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754022516] [2022-12-14 13:27:03,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:03,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:27:03,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:03,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:27:03,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:27:03,154 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-12-14 13:27:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:03,215 INFO L93 Difference]: Finished difference Result 286 states and 402 transitions. [2022-12-14 13:27:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:27:03,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2022-12-14 13:27:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:03,216 INFO L225 Difference]: With dead ends: 286 [2022-12-14 13:27:03,216 INFO L226 Difference]: Without dead ends: 202 [2022-12-14 13:27:03,217 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:03,218 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 58 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:03,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 205 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-14 13:27:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-12-14 13:27:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.3819095477386936) internal successors, (275), 199 states have internal predecessors, (275), 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) [2022-12-14 13:27:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 275 transitions. [2022-12-14 13:27:03,240 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 275 transitions. Word has length 62 [2022-12-14 13:27:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:03,240 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 275 transitions. [2022-12-14 13:27:03,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-12-14 13:27:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 275 transitions. [2022-12-14 13:27:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 13:27:03,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:03,241 INFO L195 NwaCegarLoop]: 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] [2022-12-14 13:27:03,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:27:03,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:03,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1859071284, now seen corresponding path program 1 times [2022-12-14 13:27:03,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:03,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819624325] [2022-12-14 13:27:03,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:03,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:03,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819624325] [2022-12-14 13:27:03,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819624325] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:03,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:03,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:27:03,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544614446] [2022-12-14 13:27:03,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:03,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:27:03,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:27:03,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:27:03,308 INFO L87 Difference]: Start difference. First operand 200 states and 275 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:03,397 INFO L93 Difference]: Finished difference Result 500 states and 717 transitions. [2022-12-14 13:27:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:27:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-12-14 13:27:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:03,401 INFO L225 Difference]: With dead ends: 500 [2022-12-14 13:27:03,401 INFO L226 Difference]: Without dead ends: 342 [2022-12-14 13:27:03,402 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:03,403 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 53 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:03,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 201 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-12-14 13:27:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 340. [2022-12-14 13:27:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.4129793510324484) internal successors, (479), 339 states have internal predecessors, (479), 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) [2022-12-14 13:27:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 479 transitions. [2022-12-14 13:27:03,455 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 479 transitions. Word has length 65 [2022-12-14 13:27:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:03,455 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 479 transitions. [2022-12-14 13:27:03,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 479 transitions. [2022-12-14 13:27:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 13:27:03,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:03,457 INFO L195 NwaCegarLoop]: 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] [2022-12-14 13:27:03,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:27:03,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:03,458 INFO L85 PathProgramCache]: Analyzing trace with hash 358115966, now seen corresponding path program 1 times [2022-12-14 13:27:03,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:03,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573207304] [2022-12-14 13:27:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:03,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:03,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:03,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573207304] [2022-12-14 13:27:03,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573207304] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:03,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:03,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:27:03,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018235995] [2022-12-14 13:27:03,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:03,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:27:03,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:27:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:27:03,540 INFO L87 Difference]: Start difference. First operand 340 states and 479 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-12-14 13:27:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:03,637 INFO L93 Difference]: Finished difference Result 904 states and 1305 transitions. [2022-12-14 13:27:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:27:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2022-12-14 13:27:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:03,639 INFO L225 Difference]: With dead ends: 904 [2022-12-14 13:27:03,639 INFO L226 Difference]: Without dead ends: 606 [2022-12-14 13:27:03,641 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:03,642 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 48 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:03,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 197 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-12-14 13:27:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 604. [2022-12-14 13:27:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.4245439469320067) internal successors, (859), 603 states have internal predecessors, (859), 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) [2022-12-14 13:27:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 859 transitions. [2022-12-14 13:27:03,716 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 859 transitions. Word has length 68 [2022-12-14 13:27:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:03,717 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 859 transitions. [2022-12-14 13:27:03,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-12-14 13:27:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 859 transitions. [2022-12-14 13:27:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 13:27:03,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:03,718 INFO L195 NwaCegarLoop]: 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] [2022-12-14 13:27:03,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:27:03,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1606113817, now seen corresponding path program 1 times [2022-12-14 13:27:03,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:03,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541118978] [2022-12-14 13:27:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:03,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:03,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:03,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541118978] [2022-12-14 13:27:03,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541118978] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:03,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:03,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:27:03,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383469429] [2022-12-14 13:27:03,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:03,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:27:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:27:03,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:27:03,792 INFO L87 Difference]: Start difference. First operand 604 states and 859 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-12-14 13:27:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:04,000 INFO L93 Difference]: Finished difference Result 1664 states and 2397 transitions. [2022-12-14 13:27:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:27:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2022-12-14 13:27:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:04,005 INFO L225 Difference]: With dead ends: 1664 [2022-12-14 13:27:04,005 INFO L226 Difference]: Without dead ends: 1102 [2022-12-14 13:27:04,007 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:04,008 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 43 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:04,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 193 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-12-14 13:27:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1100. [2022-12-14 13:27:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 1.4222020018198362) internal successors, (1563), 1099 states have internal predecessors, (1563), 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) [2022-12-14 13:27:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1563 transitions. [2022-12-14 13:27:04,177 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1563 transitions. Word has length 71 [2022-12-14 13:27:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:04,178 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1563 transitions. [2022-12-14 13:27:04,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-12-14 13:27:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1563 transitions. [2022-12-14 13:27:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 13:27:04,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:04,179 INFO L195 NwaCegarLoop]: 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] [2022-12-14 13:27:04,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:27:04,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash -974143445, now seen corresponding path program 1 times [2022-12-14 13:27:04,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:04,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069135700] [2022-12-14 13:27:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:04,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:04,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:04,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069135700] [2022-12-14 13:27:04,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069135700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:04,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:04,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:27:04,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607543382] [2022-12-14 13:27:04,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:04,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:27:04,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:27:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:27:04,262 INFO L87 Difference]: Start difference. First operand 1100 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2022-12-14 13:27:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:04,531 INFO L93 Difference]: Finished difference Result 3088 states and 4413 transitions. [2022-12-14 13:27:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:27:04,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2022-12-14 13:27:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:04,539 INFO L225 Difference]: With dead ends: 3088 [2022-12-14 13:27:04,539 INFO L226 Difference]: Without dead ends: 2030 [2022-12-14 13:27:04,541 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:04,542 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 38 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:04,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 189 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-12-14 13:27:04,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 2028. [2022-12-14 13:27:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 1.4104588061174148) internal successors, (2859), 2027 states have internal predecessors, (2859), 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) [2022-12-14 13:27:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2859 transitions. [2022-12-14 13:27:04,710 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2859 transitions. Word has length 74 [2022-12-14 13:27:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:04,711 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 2859 transitions. [2022-12-14 13:27:04,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2022-12-14 13:27:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2859 transitions. [2022-12-14 13:27:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 13:27:04,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:04,711 INFO L195 NwaCegarLoop]: 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] [2022-12-14 13:27:04,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:27:04,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:04,712 INFO L85 PathProgramCache]: Analyzing trace with hash 88724831, now seen corresponding path program 1 times [2022-12-14 13:27:04,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:04,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152584142] [2022-12-14 13:27:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:04,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:04,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:04,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152584142] [2022-12-14 13:27:04,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152584142] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:04,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:04,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:27:04,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071734937] [2022-12-14 13:27:04,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:04,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:27:04,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:04,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:27:04,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:27:04,878 INFO L87 Difference]: Start difference. First operand 2028 states and 2859 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2022-12-14 13:27:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:05,735 INFO L93 Difference]: Finished difference Result 8258 states and 11740 transitions. [2022-12-14 13:27:05,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 13:27:05,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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 [2022-12-14 13:27:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:05,752 INFO L225 Difference]: With dead ends: 8258 [2022-12-14 13:27:05,752 INFO L226 Difference]: Without dead ends: 6272 [2022-12-14 13:27:05,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:27:05,756 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 809 mSDsluCounter, 2073 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:05,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 2171 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:27:05,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2022-12-14 13:27:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 2728. [2022-12-14 13:27:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2727 states have (on average 1.3986065273193986) internal successors, (3814), 2727 states have internal predecessors, (3814), 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) [2022-12-14 13:27:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 3814 transitions. [2022-12-14 13:27:06,032 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 3814 transitions. Word has length 77 [2022-12-14 13:27:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:06,032 INFO L495 AbstractCegarLoop]: Abstraction has 2728 states and 3814 transitions. [2022-12-14 13:27:06,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2022-12-14 13:27:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 3814 transitions. [2022-12-14 13:27:06,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 13:27:06,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:06,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:06,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:27:06,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1556602981, now seen corresponding path program 1 times [2022-12-14 13:27:06,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:06,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414778944] [2022-12-14 13:27:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:06,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:06,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414778944] [2022-12-14 13:27:06,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414778944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:06,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:06,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:27:06,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761292226] [2022-12-14 13:27:06,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:06,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:27:06,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:06,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:27:06,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:27:06,111 INFO L87 Difference]: Start difference. First operand 2728 states and 3814 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-12-14 13:27:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:06,521 INFO L93 Difference]: Finished difference Result 6982 states and 9840 transitions. [2022-12-14 13:27:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:27:06,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2022-12-14 13:27:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:06,530 INFO L225 Difference]: With dead ends: 6982 [2022-12-14 13:27:06,530 INFO L226 Difference]: Without dead ends: 4296 [2022-12-14 13:27:06,532 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:06,533 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 32 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:06,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 157 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2022-12-14 13:27:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4294. [2022-12-14 13:27:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.4055439086885628) internal successors, (6034), 4293 states have internal predecessors, (6034), 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) [2022-12-14 13:27:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6034 transitions. [2022-12-14 13:27:06,928 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6034 transitions. Word has length 79 [2022-12-14 13:27:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:06,928 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 6034 transitions. [2022-12-14 13:27:06,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-12-14 13:27:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6034 transitions. [2022-12-14 13:27:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 13:27:06,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:06,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:06,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:27:06,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1535600326, now seen corresponding path program 1 times [2022-12-14 13:27:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:06,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675289879] [2022-12-14 13:27:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:06,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:07,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:07,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675289879] [2022-12-14 13:27:07,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675289879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:07,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:07,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:27:07,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667742398] [2022-12-14 13:27:07,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:07,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:27:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:27:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:27:07,189 INFO L87 Difference]: Start difference. First operand 4294 states and 6034 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 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) [2022-12-14 13:27:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:07,832 INFO L93 Difference]: Finished difference Result 8546 states and 12025 transitions. [2022-12-14 13:27:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:27:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 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 79 [2022-12-14 13:27:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:07,840 INFO L225 Difference]: With dead ends: 8546 [2022-12-14 13:27:07,840 INFO L226 Difference]: Without dead ends: 4296 [2022-12-14 13:27:07,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:27:07,844 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 165 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:07,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 418 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:27:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2022-12-14 13:27:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4294. [2022-12-14 13:27:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.4050780340088516) internal successors, (6032), 4293 states have internal predecessors, (6032), 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) [2022-12-14 13:27:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6032 transitions. [2022-12-14 13:27:08,272 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6032 transitions. Word has length 79 [2022-12-14 13:27:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:08,272 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 6032 transitions. [2022-12-14 13:27:08,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 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) [2022-12-14 13:27:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6032 transitions. [2022-12-14 13:27:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:27:08,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:08,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:08,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:27:08,273 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:08,273 INFO L85 PathProgramCache]: Analyzing trace with hash -360879165, now seen corresponding path program 1 times [2022-12-14 13:27:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:08,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753745486] [2022-12-14 13:27:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:08,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:08,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753745486] [2022-12-14 13:27:08,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753745486] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:08,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:08,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:27:08,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330757128] [2022-12-14 13:27:08,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:08,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:27:08,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:27:08,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:27:08,360 INFO L87 Difference]: Start difference. First operand 4294 states and 6032 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-12-14 13:27:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:08,909 INFO L93 Difference]: Finished difference Result 8544 states and 12020 transitions. [2022-12-14 13:27:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:27:08,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 80 [2022-12-14 13:27:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:08,917 INFO L225 Difference]: With dead ends: 8544 [2022-12-14 13:27:08,917 INFO L226 Difference]: Without dead ends: 4294 [2022-12-14 13:27:08,919 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:08,920 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 244 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:08,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 83 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2022-12-14 13:27:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4294. [2022-12-14 13:27:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3901700442580947) internal successors, (5968), 4293 states have internal predecessors, (5968), 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) [2022-12-14 13:27:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5968 transitions. [2022-12-14 13:27:09,406 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5968 transitions. Word has length 80 [2022-12-14 13:27:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:09,406 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5968 transitions. [2022-12-14 13:27:09,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-12-14 13:27:09,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5968 transitions. [2022-12-14 13:27:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:27:09,407 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:09,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:09,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:27:09,408 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1123742872, now seen corresponding path program 1 times [2022-12-14 13:27:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:09,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156713367] [2022-12-14 13:27:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:09,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:09,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156713367] [2022-12-14 13:27:09,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156713367] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:09,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:09,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:27:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136571293] [2022-12-14 13:27:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:09,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:27:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:27:09,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:27:09,497 INFO L87 Difference]: Start difference. First operand 4294 states and 5968 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-12-14 13:27:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:10,055 INFO L93 Difference]: Finished difference Result 8544 states and 11892 transitions. [2022-12-14 13:27:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:27:10,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 80 [2022-12-14 13:27:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:10,063 INFO L225 Difference]: With dead ends: 8544 [2022-12-14 13:27:10,063 INFO L226 Difference]: Without dead ends: 4294 [2022-12-14 13:27:10,066 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:10,067 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 215 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:10,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 99 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2022-12-14 13:27:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4294. [2022-12-14 13:27:10,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3780573025856044) internal successors, (5916), 4293 states have internal predecessors, (5916), 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) [2022-12-14 13:27:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5916 transitions. [2022-12-14 13:27:10,579 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5916 transitions. Word has length 80 [2022-12-14 13:27:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:10,579 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5916 transitions. [2022-12-14 13:27:10,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-12-14 13:27:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5916 transitions. [2022-12-14 13:27:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:27:10,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:10,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:10,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:27:10,581 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:10,581 INFO L85 PathProgramCache]: Analyzing trace with hash -258210483, now seen corresponding path program 1 times [2022-12-14 13:27:10,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:10,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615775458] [2022-12-14 13:27:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:10,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:10,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:10,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615775458] [2022-12-14 13:27:10,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615775458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:10,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:10,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:27:10,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238326912] [2022-12-14 13:27:10,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:10,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:27:10,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:10,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:27:10,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:27:10,676 INFO L87 Difference]: Start difference. First operand 4294 states and 5916 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-12-14 13:27:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:11,352 INFO L93 Difference]: Finished difference Result 8544 states and 11788 transitions. [2022-12-14 13:27:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:27:11,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 80 [2022-12-14 13:27:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:11,362 INFO L225 Difference]: With dead ends: 8544 [2022-12-14 13:27:11,362 INFO L226 Difference]: Without dead ends: 4294 [2022-12-14 13:27:11,367 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:27:11,368 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 264 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:11,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 67 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2022-12-14 13:27:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4294. [2022-12-14 13:27:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3482413230840904) internal successors, (5788), 4293 states have internal predecessors, (5788), 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) [2022-12-14 13:27:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5788 transitions. [2022-12-14 13:27:11,903 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5788 transitions. Word has length 80 [2022-12-14 13:27:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:11,903 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5788 transitions. [2022-12-14 13:27:11,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-12-14 13:27:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5788 transitions. [2022-12-14 13:27:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:27:11,904 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:11,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:11,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:27:11,904 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1999627598, now seen corresponding path program 1 times [2022-12-14 13:27:11,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:11,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432237280] [2022-12-14 13:27:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:11,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:12,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:12,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432237280] [2022-12-14 13:27:12,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432237280] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:12,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:12,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:27:12,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867208221] [2022-12-14 13:27:12,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:12,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:27:12,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:27:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:27:12,037 INFO L87 Difference]: Start difference. First operand 4294 states and 5788 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-12-14 13:27:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:13,270 INFO L93 Difference]: Finished difference Result 7185 states and 9610 transitions. [2022-12-14 13:27:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:27:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 80 [2022-12-14 13:27:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:13,279 INFO L225 Difference]: With dead ends: 7185 [2022-12-14 13:27:13,279 INFO L226 Difference]: Without dead ends: 7183 [2022-12-14 13:27:13,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:27:13,281 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 113 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:13,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 478 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:27:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7183 states. [2022-12-14 13:27:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7183 to 4422. [2022-12-14 13:27:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4421 states have (on average 1.31644424338385) internal successors, (5820), 4421 states have internal predecessors, (5820), 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) [2022-12-14 13:27:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 5820 transitions. [2022-12-14 13:27:14,202 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 5820 transitions. Word has length 80 [2022-12-14 13:27:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:14,203 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 5820 transitions. [2022-12-14 13:27:14,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-12-14 13:27:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 5820 transitions. [2022-12-14 13:27:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 13:27:14,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:14,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:14,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 13:27:14,204 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:14,205 INFO L85 PathProgramCache]: Analyzing trace with hash -430738576, now seen corresponding path program 1 times [2022-12-14 13:27:14,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:14,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420503358] [2022-12-14 13:27:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:14,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:25,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:25,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420503358] [2022-12-14 13:27:25,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420503358] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:27:25,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028945345] [2022-12-14 13:27:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:25,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:25,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:27:25,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:27:25,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720c3a65-290e-4ca0-9664-62835bc2427c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:27:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:25,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 13:27:25,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:44,985 INFO L328 TraceCheckSpWp]: Computing backward predicates...