./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9 --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 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- 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-6b4ec56 [2022-11-20 19:59:51,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:59:51,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:59:51,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:59:51,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:59:51,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:59:51,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:59:51,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:59:51,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:59:51,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:59:51,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:59:51,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:59:51,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:59:51,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:59:51,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:59:51,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:59:51,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:59:51,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:59:51,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:59:51,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:59:51,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:59:51,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:59:51,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:59:51,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:59:51,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:59:51,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:59:51,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:59:51,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:59:51,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:59:51,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:59:51,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:59:51,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:59:51,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:59:51,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:59:51,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:59:51,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:59:51,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:59:51,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:59:51,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:59:51,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:59:51,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:59:51,962 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:59:51,985 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:59:51,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:59:51,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:59:51,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:59:51,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:59:51,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:59:51,987 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:59:51,987 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:59:51,987 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:59:51,987 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:59:51,988 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:59:51,988 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:59:51,988 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:59:51,988 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:59:51,988 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:59:51,989 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:59:51,989 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:59:51,989 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:59:51,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:59:51,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:59:51,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:59:51,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:59:51,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:59:51,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:59:51,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:59:51,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:59:51,991 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:59:51,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:59:51,991 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:59:51,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:59:51,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:59:51,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:59:51,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:59:51,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:59:51,992 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:59:51,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:59:51,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:59:51,993 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:59:51,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:59:51,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:59:51,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:59:51,994 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_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2022-11-20 19:59:52,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:59:52,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:59:52,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:59:52,275 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:59:52,277 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:59:52,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-11-20 19:59:55,324 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:59:55,637 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:59:55,645 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-11-20 19:59:55,662 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/data/12173d2d5/a9fe8cbfb9b3453e81a8a5c63baa1d8e/FLAGfab22494f [2022-11-20 19:59:55,677 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/data/12173d2d5/a9fe8cbfb9b3453e81a8a5c63baa1d8e [2022-11-20 19:59:55,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:59:55,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:59:55,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:59:55,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:59:55,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:59:55,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:59:55" (1/1) ... [2022-11-20 19:59:55,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5f2013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:55, skipping insertion in model container [2022-11-20 19:59:55,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:59:55" (1/1) ... [2022-11-20 19:59:55,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:59:55,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:59:56,028 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_a716ebba-da16-4c4e-8a88-0da3117976e7/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-11-20 19:59:56,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:59:56,350 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:59:56,421 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_a716ebba-da16-4c4e-8a88-0da3117976e7/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-11-20 19:59:56,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:59:56,593 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:59:56,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56 WrapperNode [2022-11-20 19:59:56,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:59:56,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:59:56,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:59:56,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:59:56,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,675 INFO L138 Inliner]: procedures = 95, calls = 344, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 873 [2022-11-20 19:59:56,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:59:56,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:59:56,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:59:56,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:59:56,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,735 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:59:56,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:59:56,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:59:56,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:59:56,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (1/1) ... [2022-11-20 19:59:56,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:59:56,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:56,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:59:56,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a716ebba-da16-4c4e-8a88-0da3117976e7/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:59:56,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:59:56,838 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-20 19:59:56,838 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-20 19:59:56,838 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-20 19:59:56,838 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-20 19:59:56,838 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-20 19:59:56,839 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-20 19:59:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-20 19:59:56,839 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-20 19:59:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-20 19:59:56,839 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-20 19:59:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-20 19:59:56,840 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-20 19:59:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 19:59:56,840 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 19:59:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 19:59:56,840 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 19:59:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-20 19:59:56,840 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-20 19:59:56,841 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-20 19:59:56,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-20 19:59:56,841 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-20 19:59:56,842 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-20 19:59:56,842 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-20 19:59:56,842 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-20 19:59:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-20 19:59:56,843 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-20 19:59:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-20 19:59:56,844 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-20 19:59:56,844 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-20 19:59:56,844 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-20 19:59:56,844 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-20 19:59:56,844 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-20 19:59:56,844 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-20 19:59:56,845 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-20 19:59:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-20 19:59:56,845 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-20 19:59:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-20 19:59:56,845 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-20 19:59:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-20 19:59:56,846 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-20 19:59:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:59:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-20 19:59:56,846 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-20 19:59:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-20 19:59:56,847 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-20 19:59:56,847 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-20 19:59:56,848 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-20 19:59:56,848 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-20 19:59:56,848 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-20 19:59:56,849 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-20 19:59:56,849 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-20 19:59:56,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:59:56,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:59:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-20 19:59:56,850 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-20 19:59:57,049 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:59:57,051 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:59:58,263 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:59:59,109 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:59:59,109 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 19:59:59,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:59:59 BoogieIcfgContainer [2022-11-20 19:59:59,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:59:59,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:59:59,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:59:59,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:59:59,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:59:55" (1/3) ... [2022-11-20 19:59:59,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8badec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:59:59, skipping insertion in model container [2022-11-20 19:59:59,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:56" (2/3) ... [2022-11-20 19:59:59,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8badec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:59:59, skipping insertion in model container [2022-11-20 19:59:59,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:59:59" (3/3) ... [2022-11-20 19:59:59,127 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product30.cil.c [2022-11-20 19:59:59,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:59:59,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:59:59,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:59:59,234 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;@929ab7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:59:59,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:59:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2022-11-20 19:59:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 19:59:59,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:59,264 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] [2022-11-20 19:59:59,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:59,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1920796370, now seen corresponding path program 1 times [2022-11-20 19:59:59,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:59,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470006681] [2022-11-20 19:59:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:59,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:59:59,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:59,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470006681] [2022-11-20 19:59:59,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470006681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:59,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:59:59,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:59:59,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722619885] [2022-11-20 19:59:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:59,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 19:59:59,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 19:59:59,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:59:59,837 INFO L87 Difference]: Start difference. First operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-20 20:00:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:00,049 INFO L93 Difference]: Finished difference Result 396 states and 622 transitions. [2022-11-20 20:00:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:00:00,052 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2022-11-20 20:00:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:00,069 INFO L225 Difference]: With dead ends: 396 [2022-11-20 20:00:00,069 INFO L226 Difference]: Without dead ends: 374 [2022-11-20 20:00:00,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:00:00,076 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:00,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 549 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-20 20:00:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2022-11-20 20:00:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 252 states have (on average 1.5753968253968254) internal successors, (397), 273 states have internal predecessors, (397), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-20 20:00:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 584 transitions. [2022-11-20 20:00:00,152 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 584 transitions. Word has length 43 [2022-11-20 20:00:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:00,157 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 584 transitions. [2022-11-20 20:00:00,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-20 20:00:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 584 transitions. [2022-11-20 20:00:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:00:00,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:00,162 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] [2022-11-20 20:00:00,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:00:00,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:00,163 INFO L85 PathProgramCache]: Analyzing trace with hash -238457962, now seen corresponding path program 1 times [2022-11-20 20:00:00,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:00,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684606671] [2022-11-20 20:00:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:00,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:00,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:00,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684606671] [2022-11-20 20:00:00,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684606671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:00,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:00,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:00:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781280974] [2022-11-20 20:00:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:00,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:00:00,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:00,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:00:00,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:00,781 INFO L87 Difference]: Start difference. First operand 374 states and 584 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 20:00:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:03,273 INFO L93 Difference]: Finished difference Result 1210 states and 1926 transitions. [2022-11-20 20:00:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:00:03,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-11-20 20:00:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:03,293 INFO L225 Difference]: With dead ends: 1210 [2022-11-20 20:00:03,296 INFO L226 Difference]: Without dead ends: 852 [2022-11-20 20:00:03,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:00:03,308 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1198 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:03,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 894 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 20:00:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-11-20 20:00:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 755. [2022-11-20 20:00:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 528 states have (on average 1.5909090909090908) internal successors, (840), 558 states have internal predecessors, (840), 179 states have call successors, (179), 46 states have call predecessors, (179), 47 states have return successors, (181), 163 states have call predecessors, (181), 174 states have call successors, (181) [2022-11-20 20:00:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1200 transitions. [2022-11-20 20:00:03,443 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1200 transitions. Word has length 44 [2022-11-20 20:00:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:03,444 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1200 transitions. [2022-11-20 20:00:03,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 20:00:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1200 transitions. [2022-11-20 20:00:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 20:00:03,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:03,461 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] [2022-11-20 20:00:03,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:00:03,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:03,467 INFO L85 PathProgramCache]: Analyzing trace with hash -984985736, now seen corresponding path program 1 times [2022-11-20 20:00:03,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:03,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713177003] [2022-11-20 20:00:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:03,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:04,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:04,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713177003] [2022-11-20 20:00:04,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713177003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:04,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:04,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:00:04,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379175277] [2022-11-20 20:00:04,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:04,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:00:04,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:04,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:00:04,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:00:04,050 INFO L87 Difference]: Start difference. First operand 755 states and 1200 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-20 20:00:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:07,460 INFO L93 Difference]: Finished difference Result 2572 states and 4125 transitions. [2022-11-20 20:00:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:00:07,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-11-20 20:00:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:07,478 INFO L225 Difference]: With dead ends: 2572 [2022-11-20 20:00:07,479 INFO L226 Difference]: Without dead ends: 1833 [2022-11-20 20:00:07,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:00:07,493 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 1280 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 4959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:07,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 1962 Invalid, 4959 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [635 Valid, 4324 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 20:00:07,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-11-20 20:00:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1680. [2022-11-20 20:00:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1143 states have (on average 1.5643044619422573) internal successors, (1788), 1215 states have internal predecessors, (1788), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-11-20 20:00:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2685 transitions. [2022-11-20 20:00:07,657 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2685 transitions. Word has length 75 [2022-11-20 20:00:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:07,657 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 2685 transitions. [2022-11-20 20:00:07,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-20 20:00:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2685 transitions. [2022-11-20 20:00:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 20:00:07,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:07,660 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] [2022-11-20 20:00:07,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:00:07,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:07,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1337377476, now seen corresponding path program 1 times [2022-11-20 20:00:07,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:07,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867260865] [2022-11-20 20:00:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:07,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:08,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867260865] [2022-11-20 20:00:08,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867260865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:08,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:08,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:00:08,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115421743] [2022-11-20 20:00:08,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:08,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:00:08,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:00:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:00:08,050 INFO L87 Difference]: Start difference. First operand 1680 states and 2685 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-20 20:00:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:08,499 INFO L93 Difference]: Finished difference Result 3915 states and 6340 transitions. [2022-11-20 20:00:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:00:08,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-11-20 20:00:08,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:08,521 INFO L225 Difference]: With dead ends: 3915 [2022-11-20 20:00:08,521 INFO L226 Difference]: Without dead ends: 2253 [2022-11-20 20:00:08,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:00:08,570 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 177 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:08,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2240 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:00:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-11-20 20:00:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1698. [2022-11-20 20:00:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1161 states have (on average 1.5555555555555556) internal successors, (1806), 1233 states have internal predecessors, (1806), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-11-20 20:00:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2703 transitions. [2022-11-20 20:00:08,786 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2703 transitions. Word has length 76 [2022-11-20 20:00:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:08,787 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2703 transitions. [2022-11-20 20:00:08,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-20 20:00:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2703 transitions. [2022-11-20 20:00:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 20:00:08,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:08,792 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:00:08,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:00:08,793 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:08,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1193998400, now seen corresponding path program 1 times [2022-11-20 20:00:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:08,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530247177] [2022-11-20 20:00:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:08,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:00:09,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530247177] [2022-11-20 20:00:09,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530247177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:09,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:09,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 20:00:09,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730395859] [2022-11-20 20:00:09,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:09,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:00:09,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:00:09,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:09,332 INFO L87 Difference]: Start difference. First operand 1698 states and 2703 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-20 20:00:13,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:13,006 INFO L93 Difference]: Finished difference Result 4769 states and 7618 transitions. [2022-11-20 20:00:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:00:13,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 78 [2022-11-20 20:00:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:13,028 INFO L225 Difference]: With dead ends: 4769 [2022-11-20 20:00:13,028 INFO L226 Difference]: Without dead ends: 3089 [2022-11-20 20:00:13,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:00:13,039 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1715 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 4498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:13,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1775 Valid, 2331 Invalid, 4498 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [589 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 20:00:13,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2022-11-20 20:00:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2954. [2022-11-20 20:00:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2093 states have (on average 1.5805064500716675) internal successors, (3308), 2184 states have internal predecessors, (3308), 680 states have call successors, (680), 150 states have call predecessors, (680), 180 states have return successors, (743), 663 states have call predecessors, (743), 675 states have call successors, (743) [2022-11-20 20:00:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 4731 transitions. [2022-11-20 20:00:13,325 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 4731 transitions. Word has length 78 [2022-11-20 20:00:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:13,326 INFO L495 AbstractCegarLoop]: Abstraction has 2954 states and 4731 transitions. [2022-11-20 20:00:13,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-20 20:00:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 4731 transitions. [2022-11-20 20:00:13,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 20:00:13,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:13,330 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:13,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:00:13,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1996315124, now seen corresponding path program 1 times [2022-11-20 20:00:13,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:13,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267743867] [2022-11-20 20:00:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:13,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:00:13,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:13,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267743867] [2022-11-20 20:00:13,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267743867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:13,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:13,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:00:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220144415] [2022-11-20 20:00:13,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:13,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:00:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:00:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:00:13,650 INFO L87 Difference]: Start difference. First operand 2954 states and 4731 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:00:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:14,077 INFO L93 Difference]: Finished difference Result 5282 states and 8482 transitions. [2022-11-20 20:00:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:00:14,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-11-20 20:00:14,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:14,099 INFO L225 Difference]: With dead ends: 5282 [2022-11-20 20:00:14,100 INFO L226 Difference]: Without dead ends: 3066 [2022-11-20 20:00:14,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:00:14,114 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 7 mSDsluCounter, 2695 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:14,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3242 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:00:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2022-11-20 20:00:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 3024. [2022-11-20 20:00:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 2143 states have (on average 1.566962202519832) internal successors, (3358), 2234 states have internal predecessors, (3358), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 683 states have call predecessors, (793), 675 states have call successors, (793) [2022-11-20 20:00:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 4831 transitions. [2022-11-20 20:00:14,391 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 4831 transitions. Word has length 83 [2022-11-20 20:00:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:14,394 INFO L495 AbstractCegarLoop]: Abstraction has 3024 states and 4831 transitions. [2022-11-20 20:00:14,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:00:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 4831 transitions. [2022-11-20 20:00:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 20:00:14,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:14,398 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:00:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:00:14,398 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash -591162, now seen corresponding path program 1 times [2022-11-20 20:00:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:14,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795658430] [2022-11-20 20:00:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:00:14,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:14,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795658430] [2022-11-20 20:00:14,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795658430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:14,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:14,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:00:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156865268] [2022-11-20 20:00:14,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:14,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:00:14,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:00:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:00:14,672 INFO L87 Difference]: Start difference. First operand 3024 states and 4831 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:00:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:15,114 INFO L93 Difference]: Finished difference Result 5388 states and 8622 transitions. [2022-11-20 20:00:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:00:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-11-20 20:00:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:15,137 INFO L225 Difference]: With dead ends: 5388 [2022-11-20 20:00:15,138 INFO L226 Difference]: Without dead ends: 3116 [2022-11-20 20:00:15,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:00:15,152 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 6 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:15,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3261 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:00:15,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-11-20 20:00:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3034. [2022-11-20 20:00:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 2153 states have (on average 1.564328843474222) internal successors, (3368), 2234 states have internal predecessors, (3368), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 693 states have call predecessors, (793), 675 states have call successors, (793) [2022-11-20 20:00:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4841 transitions. [2022-11-20 20:00:15,440 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4841 transitions. Word has length 82 [2022-11-20 20:00:15,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:15,441 INFO L495 AbstractCegarLoop]: Abstraction has 3034 states and 4841 transitions. [2022-11-20 20:00:15,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:00:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4841 transitions. [2022-11-20 20:00:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 20:00:15,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:15,445 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:15,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:00:15,445 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:15,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1877902356, now seen corresponding path program 1 times [2022-11-20 20:00:15,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:15,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411870148] [2022-11-20 20:00:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:15,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:00:15,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:15,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411870148] [2022-11-20 20:00:15,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411870148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:15,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:15,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:00:15,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244693754] [2022-11-20 20:00:15,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:15,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:00:15,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:00:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:00:15,729 INFO L87 Difference]: Start difference. First operand 3034 states and 4841 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:00:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:16,266 INFO L93 Difference]: Finished difference Result 5406 states and 8640 transitions. [2022-11-20 20:00:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:00:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-11-20 20:00:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:16,290 INFO L225 Difference]: With dead ends: 5406 [2022-11-20 20:00:16,290 INFO L226 Difference]: Without dead ends: 3126 [2022-11-20 20:00:16,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:00:16,306 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 6 mSDsluCounter, 2714 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:16,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3266 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:00:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2022-11-20 20:00:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3044. [2022-11-20 20:00:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2163 states have (on average 1.5617198335644937) internal successors, (3378), 2234 states have internal predecessors, (3378), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 703 states have call predecessors, (793), 675 states have call successors, (793) [2022-11-20 20:00:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4851 transitions. [2022-11-20 20:00:16,578 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4851 transitions. Word has length 83 [2022-11-20 20:00:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:16,578 INFO L495 AbstractCegarLoop]: Abstraction has 3044 states and 4851 transitions. [2022-11-20 20:00:16,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:00:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4851 transitions. [2022-11-20 20:00:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 20:00:16,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:16,583 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:16,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:00:16,584 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:16,584 INFO L85 PathProgramCache]: Analyzing trace with hash -385724476, now seen corresponding path program 1 times [2022-11-20 20:00:16,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:16,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080293652] [2022-11-20 20:00:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:16,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:00:16,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:16,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080293652] [2022-11-20 20:00:16,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080293652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:16,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:16,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:00:16,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639457403] [2022-11-20 20:00:16,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:16,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:00:16,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:00:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:00:16,950 INFO L87 Difference]: Start difference. First operand 3044 states and 4851 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-20 20:00:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:19,917 INFO L93 Difference]: Finished difference Result 7552 states and 12115 transitions. [2022-11-20 20:00:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:00:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) Word has length 87 [2022-11-20 20:00:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:19,945 INFO L225 Difference]: With dead ends: 7552 [2022-11-20 20:00:19,945 INFO L226 Difference]: Without dead ends: 5022 [2022-11-20 20:00:19,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:19,963 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 1689 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 3020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:19,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1844 Valid, 1365 Invalid, 3020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 20:00:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2022-11-20 20:00:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 4910. [2022-11-20 20:00:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 3416 states have (on average 1.5199063231850116) internal successors, (5192), 3557 states have internal predecessors, (5192), 1147 states have call successors, (1147), 266 states have call predecessors, (1147), 346 states have return successors, (1367), 1163 states have call predecessors, (1367), 1142 states have call successors, (1367) [2022-11-20 20:00:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 7706 transitions. [2022-11-20 20:00:20,477 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 7706 transitions. Word has length 87 [2022-11-20 20:00:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:20,478 INFO L495 AbstractCegarLoop]: Abstraction has 4910 states and 7706 transitions. [2022-11-20 20:00:20,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-20 20:00:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 7706 transitions. [2022-11-20 20:00:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-20 20:00:20,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:20,482 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:20,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:00:20,482 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1409040281, now seen corresponding path program 1 times [2022-11-20 20:00:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:20,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587004940] [2022-11-20 20:00:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:00:21,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:21,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587004940] [2022-11-20 20:00:21,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587004940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:21,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:21,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 20:00:21,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121141063] [2022-11-20 20:00:21,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:21,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:00:21,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:00:21,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:00:21,029 INFO L87 Difference]: Start difference. First operand 4910 states and 7706 transitions. Second operand has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-20 20:00:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:27,083 INFO L93 Difference]: Finished difference Result 10325 states and 16514 transitions. [2022-11-20 20:00:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 20:00:27,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 89 [2022-11-20 20:00:27,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:27,134 INFO L225 Difference]: With dead ends: 10325 [2022-11-20 20:00:27,135 INFO L226 Difference]: Without dead ends: 5841 [2022-11-20 20:00:27,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 20:00:27,168 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 2025 mSDsluCounter, 3648 mSDsCounter, 0 mSdLazyCounter, 7682 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 4134 SdHoareTripleChecker+Invalid, 8855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 7682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:27,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2043 Valid, 4134 Invalid, 8855 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1173 Valid, 7682 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-20 20:00:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-11-20 20:00:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 5691. [2022-11-20 20:00:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5691 states, 4127 states have (on average 1.5294402713835715) internal successors, (6312), 4288 states have internal predecessors, (6312), 1167 states have call successors, (1167), 296 states have call predecessors, (1167), 396 states have return successors, (1387), 1183 states have call predecessors, (1387), 1162 states have call successors, (1387) [2022-11-20 20:00:27,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5691 states to 5691 states and 8866 transitions. [2022-11-20 20:00:27,714 INFO L78 Accepts]: Start accepts. Automaton has 5691 states and 8866 transitions. Word has length 89 [2022-11-20 20:00:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:27,715 INFO L495 AbstractCegarLoop]: Abstraction has 5691 states and 8866 transitions. [2022-11-20 20:00:27,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-20 20:00:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5691 states and 8866 transitions. [2022-11-20 20:00:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-20 20:00:27,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:27,719 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:27,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:00:27,720 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1094495665, now seen corresponding path program 1 times [2022-11-20 20:00:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:27,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498527267] [2022-11-20 20:00:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:27,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:00:28,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:28,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498527267] [2022-11-20 20:00:28,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498527267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:28,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:28,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:00:28,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684111453] [2022-11-20 20:00:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:28,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:00:28,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:00:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:28,084 INFO L87 Difference]: Start difference. First operand 5691 states and 8866 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:00:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:32,541 INFO L93 Difference]: Finished difference Result 18506 states and 29592 transitions. [2022-11-20 20:00:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:00:32,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 90 [2022-11-20 20:00:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:32,630 INFO L225 Difference]: With dead ends: 18506 [2022-11-20 20:00:32,631 INFO L226 Difference]: Without dead ends: 12833 [2022-11-20 20:00:32,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:32,656 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 2218 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:32,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2325 Valid, 1593 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 20:00:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12833 states. [2022-11-20 20:00:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12833 to 11957. [2022-11-20 20:00:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 8499 states have (on average 1.5166490175314742) internal successors, (12890), 8942 states have internal predecessors, (12890), 2644 states have call successors, (2644), 608 states have call predecessors, (2644), 813 states have return successors, (3306), 2637 states have call predecessors, (3306), 2639 states have call successors, (3306) [2022-11-20 20:00:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 18840 transitions. [2022-11-20 20:00:34,027 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 18840 transitions. Word has length 90 [2022-11-20 20:00:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:34,028 INFO L495 AbstractCegarLoop]: Abstraction has 11957 states and 18840 transitions. [2022-11-20 20:00:34,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:00:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 18840 transitions. [2022-11-20 20:00:34,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 20:00:34,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:34,031 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:34,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:00:34,032 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1459145640, now seen corresponding path program 1 times [2022-11-20 20:00:34,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:34,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979033706] [2022-11-20 20:00:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:34,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:00:34,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:34,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979033706] [2022-11-20 20:00:34,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979033706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:34,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:34,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:00:34,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840189221] [2022-11-20 20:00:34,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:34,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:00:34,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:34,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:00:34,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:00:34,369 INFO L87 Difference]: Start difference. First operand 11957 states and 18840 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 20:00:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:37,446 INFO L93 Difference]: Finished difference Result 23286 states and 36876 transitions. [2022-11-20 20:00:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:00:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2022-11-20 20:00:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:37,535 INFO L225 Difference]: With dead ends: 23286 [2022-11-20 20:00:37,535 INFO L226 Difference]: Without dead ends: 12875 [2022-11-20 20:00:37,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:00:37,581 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 969 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:37,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 1482 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 20:00:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12875 states. [2022-11-20 20:00:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12875 to 12163. [2022-11-20 20:00:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12163 states, 8643 states have (on average 1.5133634154807358) internal successors, (13080), 9114 states have internal predecessors, (13080), 2648 states have call successors, (2648), 640 states have call predecessors, (2648), 871 states have return successors, (3384), 2639 states have call predecessors, (3384), 2643 states have call successors, (3384) [2022-11-20 20:00:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12163 states to 12163 states and 19112 transitions. [2022-11-20 20:00:38,870 INFO L78 Accepts]: Start accepts. Automaton has 12163 states and 19112 transitions. Word has length 91 [2022-11-20 20:00:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:38,871 INFO L495 AbstractCegarLoop]: Abstraction has 12163 states and 19112 transitions. [2022-11-20 20:00:38,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 20:00:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12163 states and 19112 transitions. [2022-11-20 20:00:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 20:00:38,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:38,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:38,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:00:38,877 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:38,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:38,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1341897307, now seen corresponding path program 1 times [2022-11-20 20:00:38,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:38,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266372231] [2022-11-20 20:00:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:38,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:00:39,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266372231] [2022-11-20 20:00:39,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266372231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:39,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:39,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:00:39,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733179741] [2022-11-20 20:00:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:39,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:00:39,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:00:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:39,137 INFO L87 Difference]: Start difference. First operand 12163 states and 19112 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-20 20:00:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:40,684 INFO L93 Difference]: Finished difference Result 12289 states and 19321 transitions. [2022-11-20 20:00:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:00:40,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2022-11-20 20:00:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:40,753 INFO L225 Difference]: With dead ends: 12289 [2022-11-20 20:00:40,753 INFO L226 Difference]: Without dead ends: 12274 [2022-11-20 20:00:40,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:00:40,764 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 649 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:40,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1800 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:00:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12274 states. [2022-11-20 20:00:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12274 to 12171. [2022-11-20 20:00:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12171 states, 8651 states have (on average 1.5128886833892035) internal successors, (13088), 9122 states have internal predecessors, (13088), 2648 states have call successors, (2648), 640 states have call predecessors, (2648), 871 states have return successors, (3384), 2639 states have call predecessors, (3384), 2643 states have call successors, (3384) [2022-11-20 20:00:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12171 states to 12171 states and 19120 transitions. [2022-11-20 20:00:42,019 INFO L78 Accepts]: Start accepts. Automaton has 12171 states and 19120 transitions. Word has length 96 [2022-11-20 20:00:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:42,020 INFO L495 AbstractCegarLoop]: Abstraction has 12171 states and 19120 transitions. [2022-11-20 20:00:42,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-20 20:00:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 12171 states and 19120 transitions. [2022-11-20 20:00:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 20:00:42,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:42,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:42,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 20:00:42,025 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1279064998, now seen corresponding path program 1 times [2022-11-20 20:00:42,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:42,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046356721] [2022-11-20 20:00:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:42,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:00:42,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046356721] [2022-11-20 20:00:42,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046356721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:42,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:42,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 20:00:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942278588] [2022-11-20 20:00:42,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:42,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:00:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:00:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:00:42,626 INFO L87 Difference]: Start difference. First operand 12171 states and 19120 transitions. Second operand has 13 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-20 20:00:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:48,812 INFO L93 Difference]: Finished difference Result 13281 states and 20832 transitions. [2022-11-20 20:00:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 20:00:48,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 100 [2022-11-20 20:00:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:48,902 INFO L225 Difference]: With dead ends: 13281 [2022-11-20 20:00:48,902 INFO L226 Difference]: Without dead ends: 13264 [2022-11-20 20:00:48,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 20:00:48,919 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 2552 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 7768 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2578 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 9198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 7768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:48,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2578 Valid, 3559 Invalid, 9198 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1430 Valid, 7768 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-20 20:00:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13264 states. [2022-11-20 20:00:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13264 to 12791. [2022-11-20 20:00:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12791 states, 9139 states have (on average 1.520078783236678) internal successors, (13892), 9606 states have internal predecessors, (13892), 2690 states have call successors, (2690), 731 states have call predecessors, (2690), 961 states have return successors, (3437), 2684 states have call predecessors, (3437), 2685 states have call successors, (3437) [2022-11-20 20:00:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12791 states to 12791 states and 20019 transitions. [2022-11-20 20:00:50,138 INFO L78 Accepts]: Start accepts. Automaton has 12791 states and 20019 transitions. Word has length 100 [2022-11-20 20:00:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:50,139 INFO L495 AbstractCegarLoop]: Abstraction has 12791 states and 20019 transitions. [2022-11-20 20:00:50,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-20 20:00:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 12791 states and 20019 transitions. [2022-11-20 20:00:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-20 20:00:50,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:50,144 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:50,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 20:00:50,145 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:50,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:50,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1114040842, now seen corresponding path program 1 times [2022-11-20 20:00:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:50,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002900206] [2022-11-20 20:00:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:50,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:00:50,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:50,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002900206] [2022-11-20 20:00:50,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002900206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:50,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:50,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:00:50,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161084695] [2022-11-20 20:00:50,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:50,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:50,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:50,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:50,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:00:50,280 INFO L87 Difference]: Start difference. First operand 12791 states and 20019 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:00:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:52,437 INFO L93 Difference]: Finished difference Result 35491 states and 55920 transitions. [2022-11-20 20:00:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:52,438 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), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2022-11-20 20:00:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:52,591 INFO L225 Difference]: With dead ends: 35491 [2022-11-20 20:00:52,591 INFO L226 Difference]: Without dead ends: 22723 [2022-11-20 20:00:52,655 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 [2022-11-20 20:00:52,656 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 540 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:52,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1193 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22723 states. [2022-11-20 20:00:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22723 to 22414. [2022-11-20 20:00:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22414 states, 16077 states have (on average 1.519873110654973) internal successors, (24435), 16942 states have internal predecessors, (24435), 4649 states have call successors, (4649), 1279 states have call predecessors, (4649), 1687 states have return successors, (6162), 4528 states have call predecessors, (6162), 4644 states have call successors, (6162) [2022-11-20 20:00:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22414 states to 22414 states and 35246 transitions. [2022-11-20 20:00:55,000 INFO L78 Accepts]: Start accepts. Automaton has 22414 states and 35246 transitions. Word has length 107 [2022-11-20 20:00:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:55,000 INFO L495 AbstractCegarLoop]: Abstraction has 22414 states and 35246 transitions. [2022-11-20 20:00:55,001 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), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:00:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 22414 states and 35246 transitions. [2022-11-20 20:00:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 20:00:55,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:55,005 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:55,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 20:00:55,006 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash -175666144, now seen corresponding path program 1 times [2022-11-20 20:00:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:55,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736758876] [2022-11-20 20:00:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:00:55,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:55,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736758876] [2022-11-20 20:00:55,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736758876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:55,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:55,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:00:55,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141481705] [2022-11-20 20:00:55,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:55,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:55,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:00:55,348 INFO L87 Difference]: Start difference. First operand 22414 states and 35246 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:00:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:59,047 INFO L93 Difference]: Finished difference Result 64359 states and 102160 transitions. [2022-11-20 20:00:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:59,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 108 [2022-11-20 20:00:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:59,309 INFO L225 Difference]: With dead ends: 64359 [2022-11-20 20:00:59,309 INFO L226 Difference]: Without dead ends: 41971 [2022-11-20 20:00:59,552 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 [2022-11-20 20:00:59,552 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 539 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:59,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1199 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41971 states. [2022-11-20 20:01:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41971 to 41671. [2022-11-20 20:01:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41671 states, 29964 states have (on average 1.5186223468161795) internal successors, (45504), 31625 states have internal predecessors, (45504), 8567 states have call successors, (8567), 2375 states have call predecessors, (8567), 3139 states have return successors, (11920), 8216 states have call predecessors, (11920), 8562 states have call successors, (11920) [2022-11-20 20:01:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41671 states to 41671 states and 65991 transitions. [2022-11-20 20:01:03,423 INFO L78 Accepts]: Start accepts. Automaton has 41671 states and 65991 transitions. Word has length 108 [2022-11-20 20:01:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:03,424 INFO L495 AbstractCegarLoop]: Abstraction has 41671 states and 65991 transitions. [2022-11-20 20:01:03,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:01:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 41671 states and 65991 transitions. [2022-11-20 20:01:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 20:01:03,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:03,428 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:03,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 20:01:03,428 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:03,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1150817672, now seen corresponding path program 1 times [2022-11-20 20:01:03,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:03,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552256613] [2022-11-20 20:01:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:03,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:01:03,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:03,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552256613] [2022-11-20 20:01:03,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552256613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:03,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:03,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:01:03,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287279933] [2022-11-20 20:01:03,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:03,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:01:03,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:01:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:01:03,540 INFO L87 Difference]: Start difference. First operand 41671 states and 65991 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:01:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:10,679 INFO L93 Difference]: Finished difference Result 122126 states and 196136 transitions. [2022-11-20 20:01:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:01:10,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 109 [2022-11-20 20:01:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:11,017 INFO L225 Difference]: With dead ends: 122126 [2022-11-20 20:01:11,018 INFO L226 Difference]: Without dead ends: 80487 [2022-11-20 20:01:11,152 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 [2022-11-20 20:01:11,152 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 538 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:11,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1206 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:01:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80487 states.