./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW --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 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- 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-4e7fbc6 [2022-11-23 15:25:24,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:25:24,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:25:24,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:25:24,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:25:24,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:25:24,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:25:24,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:25:24,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:25:24,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:25:24,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:25:24,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:25:24,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:25:24,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:25:24,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:25:24,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:25:24,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:25:24,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:25:24,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:25:24,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:25:24,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:25:25,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:25:25,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:25:25,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:25:25,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:25:25,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:25:25,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:25:25,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:25:25,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:25:25,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:25:25,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:25:25,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:25:25,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:25:25,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:25:25,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:25:25,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:25:25,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:25:25,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:25:25,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:25:25,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:25:25,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:25:25,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:25:25,064 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:25:25,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:25:25,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:25:25,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:25:25,069 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:25:25,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:25:25,070 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:25:25,070 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:25:25,070 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:25:25,071 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:25:25,072 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:25:25,072 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:25:25,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:25:25,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:25:25,073 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:25:25,073 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:25:25,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:25:25,073 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:25:25,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:25:25,075 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:25:25,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:25:25,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:25:25,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:25:25,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:25:25,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:25:25,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:25:25,077 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:25:25,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:25:25,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:25:25,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:25:25,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:25:25,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:25:25,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:25:25,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:25:25,079 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:25:25,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:25:25,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:25:25,080 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:25:25,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:25:25,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:25:25,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:25:25,081 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_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2022-11-23 15:25:25,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:25:25,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:25:25,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:25:25,414 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:25:25,415 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:25:25,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2022-11-23 15:25:28,657 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:25:29,000 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:25:29,001 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2022-11-23 15:25:29,023 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/data/589fc92da/8f78f446c3cc4889907712442869ef37/FLAGb2dbbc20c [2022-11-23 15:25:29,040 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/data/589fc92da/8f78f446c3cc4889907712442869ef37 [2022-11-23 15:25:29,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:25:29,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:25:29,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:25:29,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:25:29,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:25:29,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:29,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1ad11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29, skipping insertion in model container [2022-11-23 15:25:29,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:29,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:25:29,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:25:29,659 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_1768fbb7-23a5-4205-b254-e46fe12d95d1/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2022-11-23 15:25:29,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:25:29,802 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:25:29,855 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_1768fbb7-23a5-4205-b254-e46fe12d95d1/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2022-11-23 15:25:29,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:25:29,960 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:25:29,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29 WrapperNode [2022-11-23 15:25:29,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:25:29,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:25:29,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:25:29,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:25:29,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,089 INFO L138 Inliner]: procedures = 97, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1178 [2022-11-23 15:25:30,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:25:30,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:25:30,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:25:30,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:25:30,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,148 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:25:30,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:25:30,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:25:30,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:25:30,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (1/1) ... [2022-11-23 15:25:30,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:25:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:30,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:25:30,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1768fbb7-23a5-4205-b254-e46fe12d95d1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:25:30,254 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 15:25:30,254 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 15:25:30,254 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:25:30,255 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:25:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:25:30,255 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:25:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:25:30,255 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:25:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:25:30,255 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:25:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:25:30,256 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:25:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:25:30,256 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:25:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:25:30,256 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:25:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:25:30,256 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:25:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:25:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:25:30,257 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:25:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-23 15:25:30,258 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-23 15:25:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:25:30,258 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:25:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:25:30,259 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:25:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-23 15:25:30,259 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-23 15:25:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:25:30,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:25:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:25:30,261 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:25:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:25:30,262 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:25:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-23 15:25:30,262 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-23 15:25:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:25:30,262 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:25:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:25:30,263 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:25:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:25:30,263 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:25:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:25:30,263 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:25:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:25:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:25:30,264 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:25:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:25:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:25:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:25:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:25:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-23 15:25:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-23 15:25:30,462 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:25:30,465 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:25:31,843 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:25:32,702 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:25:32,703 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:25:32,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:25:32 BoogieIcfgContainer [2022-11-23 15:25:32,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:25:32,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:25:32,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:25:32,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:25:32,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:25:29" (1/3) ... [2022-11-23 15:25:32,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a26f51c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:25:32, skipping insertion in model container [2022-11-23 15:25:32,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:29" (2/3) ... [2022-11-23 15:25:32,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a26f51c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:25:32, skipping insertion in model container [2022-11-23 15:25:32,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:25:32" (3/3) ... [2022-11-23 15:25:32,720 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2022-11-23 15:25:32,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:25:32,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:25:32,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:25:32,829 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;@7837d916, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:25:32,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:25:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-23 15:25:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 15:25:32,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:32,856 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] [2022-11-23 15:25:32,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:32,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1587334211, now seen corresponding path program 1 times [2022-11-23 15:25:32,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:32,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925788563] [2022-11-23 15:25:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:32,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:33,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:33,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925788563] [2022-11-23 15:25:33,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925788563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:33,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:33,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:25:33,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677461182] [2022-11-23 15:25:33,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:33,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:25:33,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:33,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:25:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:25:33,394 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 15:25:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:33,611 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-11-23 15:25:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:25:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-11-23 15:25:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:33,637 INFO L225 Difference]: With dead ends: 401 [2022-11-23 15:25:33,640 INFO L226 Difference]: Without dead ends: 379 [2022-11-23 15:25:33,645 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 [2022-11-23 15:25:33,652 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:33,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-23 15:25:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-23 15:25:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-23 15:25:33,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-11-23 15:25:33,764 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-11-23 15:25:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:33,765 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-11-23 15:25:33,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 15:25:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-11-23 15:25:33,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 15:25:33,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:33,779 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] [2022-11-23 15:25:33,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:25:33,779 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1461820053, now seen corresponding path program 1 times [2022-11-23 15:25:33,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:33,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769272112] [2022-11-23 15:25:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:34,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769272112] [2022-11-23 15:25:34,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769272112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:34,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:34,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:25:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424765425] [2022-11-23 15:25:34,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:34,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:25:34,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:25:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:25:34,384 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 15:25:36,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:36,847 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-11-23 15:25:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:25:36,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-11-23 15:25:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:36,856 INFO L225 Difference]: With dead ends: 1243 [2022-11-23 15:25:36,857 INFO L226 Difference]: Without dead ends: 880 [2022-11-23 15:25:36,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:25:36,862 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1226 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:36,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 1119 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 15:25:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-23 15:25:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-11-23 15:25:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2022-11-23 15:25:36,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-11-23 15:25:36,945 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-11-23 15:25:36,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:36,945 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-11-23 15:25:36,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 15:25:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-11-23 15:25:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 15:25:36,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:36,950 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:36,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:25:36,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:36,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1378588201, now seen corresponding path program 1 times [2022-11-23 15:25:36,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:36,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227338177] [2022-11-23 15:25:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:36,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:25:37,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:37,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227338177] [2022-11-23 15:25:37,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227338177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:37,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:37,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:25:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460778742] [2022-11-23 15:25:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:37,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:25:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:25:37,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:25:37,458 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 15:25:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:41,254 INFO L93 Difference]: Finished difference Result 2747 states and 4462 transitions. [2022-11-23 15:25:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 15:25:41,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-23 15:25:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:41,280 INFO L225 Difference]: With dead ends: 2747 [2022-11-23 15:25:41,280 INFO L226 Difference]: Without dead ends: 1970 [2022-11-23 15:25:41,292 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 [2022-11-23 15:25:41,296 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 1360 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4441 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 5140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 4441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:41,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 2160 Invalid, 5140 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [699 Valid, 4441 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 15:25:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-11-23 15:25:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1783. [2022-11-23 15:25:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1211 states have (on average 1.5730800990916598) internal successors, (1905), 1283 states have internal predecessors, (1905), 479 states have call successors, (479), 80 states have call predecessors, (479), 92 states have return successors, (498), 452 states have call predecessors, (498), 474 states have call successors, (498) [2022-11-23 15:25:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2882 transitions. [2022-11-23 15:25:41,484 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2882 transitions. Word has length 87 [2022-11-23 15:25:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:41,486 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2882 transitions. [2022-11-23 15:25:41,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 15:25:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2882 transitions. [2022-11-23 15:25:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 15:25:41,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:41,492 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:41,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:25:41,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1652019250, now seen corresponding path program 1 times [2022-11-23 15:25:41,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:41,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498324926] [2022-11-23 15:25:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:41,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:25:41,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:41,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498324926] [2022-11-23 15:25:41,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498324926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:41,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:41,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:25:41,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743198315] [2022-11-23 15:25:41,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:41,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:25:41,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:25:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:25:41,911 INFO L87 Difference]: Start difference. First operand 1783 states and 2882 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 15:25:44,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:44,364 INFO L93 Difference]: Finished difference Result 4518 states and 7313 transitions. [2022-11-23 15:25:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:25:44,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-11-23 15:25:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:44,390 INFO L225 Difference]: With dead ends: 4518 [2022-11-23 15:25:44,390 INFO L226 Difference]: Without dead ends: 2753 [2022-11-23 15:25:44,398 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 [2022-11-23 15:25:44,409 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 1158 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:44,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 1659 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 15:25:44,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2022-11-23 15:25:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2635. [2022-11-23 15:25:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1815 states have (on average 1.5801652892561984) internal successors, (2868), 1914 states have internal predecessors, (2868), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2022-11-23 15:25:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4253 transitions. [2022-11-23 15:25:44,613 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4253 transitions. Word has length 88 [2022-11-23 15:25:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:44,614 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4253 transitions. [2022-11-23 15:25:44,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 15:25:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4253 transitions. [2022-11-23 15:25:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-23 15:25:44,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:44,617 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:44,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:25:44,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash 762048878, now seen corresponding path program 1 times [2022-11-23 15:25:44,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:44,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540197599] [2022-11-23 15:25:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:44,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:25:44,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:44,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540197599] [2022-11-23 15:25:44,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540197599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:44,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:44,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:25:44,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216185266] [2022-11-23 15:25:44,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:44,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:25:44,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:44,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:25:44,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:25:44,907 INFO L87 Difference]: Start difference. First operand 2635 states and 4253 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 15:25:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:45,534 INFO L93 Difference]: Finished difference Result 2736 states and 4419 transitions. [2022-11-23 15:25:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:45,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-23 15:25:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:45,553 INFO L225 Difference]: With dead ends: 2736 [2022-11-23 15:25:45,553 INFO L226 Difference]: Without dead ends: 2721 [2022-11-23 15:25:45,555 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 [2022-11-23 15:25:45,558 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 690 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:45,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1484 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:25:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2022-11-23 15:25:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2641. [2022-11-23 15:25:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 1821 states have (on average 1.5782537067545306) internal successors, (2874), 1920 states have internal predecessors, (2874), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2022-11-23 15:25:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4259 transitions. [2022-11-23 15:25:45,796 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4259 transitions. Word has length 92 [2022-11-23 15:25:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:45,798 INFO L495 AbstractCegarLoop]: Abstraction has 2641 states and 4259 transitions. [2022-11-23 15:25:45,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 15:25:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4259 transitions. [2022-11-23 15:25:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-23 15:25:45,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:45,802 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:45,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:25:45,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash -432487050, now seen corresponding path program 1 times [2022-11-23 15:25:45,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:45,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255002584] [2022-11-23 15:25:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:45,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:25:46,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:46,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255002584] [2022-11-23 15:25:46,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255002584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:46,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:46,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 15:25:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649525124] [2022-11-23 15:25:46,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:46,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:25:46,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:25:46,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:25:46,379 INFO L87 Difference]: Start difference. First operand 2641 states and 4259 transitions. Second operand has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-23 15:25:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:52,883 INFO L93 Difference]: Finished difference Result 3066 states and 4901 transitions. [2022-11-23 15:25:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-23 15:25:52,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2022-11-23 15:25:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:52,904 INFO L225 Difference]: With dead ends: 3066 [2022-11-23 15:25:52,905 INFO L226 Difference]: Without dead ends: 3049 [2022-11-23 15:25:52,908 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 [2022-11-23 15:25:52,909 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 2661 mSDsluCounter, 3388 mSDsCounter, 0 mSdLazyCounter, 8713 mSolverCounterSat, 1567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 3940 SdHoareTripleChecker+Invalid, 10280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1567 IncrementalHoareTripleChecker+Valid, 8713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:52,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2687 Valid, 3940 Invalid, 10280 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1567 Valid, 8713 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-23 15:25:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2022-11-23 15:25:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2829. [2022-11-23 15:25:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 1963 states have (on average 1.577687213448803) internal successors, (3097), 2060 states have internal predecessors, (3097), 686 states have call successors, (686), 160 states have call predecessors, (686), 179 states have return successors, (737), 652 states have call predecessors, (737), 681 states have call successors, (737) [2022-11-23 15:25:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 4520 transitions. [2022-11-23 15:25:53,182 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 4520 transitions. Word has length 97 [2022-11-23 15:25:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:53,182 INFO L495 AbstractCegarLoop]: Abstraction has 2829 states and 4520 transitions. [2022-11-23 15:25:53,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-23 15:25:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 4520 transitions. [2022-11-23 15:25:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-23 15:25:53,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:53,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:53,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:25:53,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:53,193 INFO L85 PathProgramCache]: Analyzing trace with hash 117736752, now seen corresponding path program 1 times [2022-11-23 15:25:53,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:53,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411162893] [2022-11-23 15:25:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:53,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:25:53,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:53,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411162893] [2022-11-23 15:25:53,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411162893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:53,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:53,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:25:53,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478488570] [2022-11-23 15:25:53,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:53,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:25:53,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:53,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:25:53,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:25:53,496 INFO L87 Difference]: Start difference. First operand 2829 states and 4520 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:25:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:55,342 INFO L93 Difference]: Finished difference Result 7632 states and 12344 transitions. [2022-11-23 15:25:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:55,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2022-11-23 15:25:55,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:55,376 INFO L225 Difference]: With dead ends: 7632 [2022-11-23 15:25:55,376 INFO L226 Difference]: Without dead ends: 4823 [2022-11-23 15:25:55,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:25:55,393 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1170 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:55,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 731 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 15:25:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2022-11-23 15:25:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 4448. [2022-11-23 15:25:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 3093 states have (on average 1.5716133204009053) internal successors, (4861), 3254 states have internal predecessors, (4861), 1068 states have call successors, (1068), 241 states have call predecessors, (1068), 286 states have return successors, (1199), 1012 states have call predecessors, (1199), 1063 states have call successors, (1199) [2022-11-23 15:25:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 7128 transitions. [2022-11-23 15:25:55,873 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 7128 transitions. Word has length 104 [2022-11-23 15:25:55,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:55,875 INFO L495 AbstractCegarLoop]: Abstraction has 4448 states and 7128 transitions. [2022-11-23 15:25:55,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:25:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 7128 transitions. [2022-11-23 15:25:55,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-23 15:25:55,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:55,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:55,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:25:55,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:55,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash -645408902, now seen corresponding path program 1 times [2022-11-23 15:25:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:55,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357949725] [2022-11-23 15:25:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:55,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:25:56,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:56,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357949725] [2022-11-23 15:25:56,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357949725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:56,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:56,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:25:56,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444797036] [2022-11-23 15:25:56,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:56,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:25:56,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:25:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:25:56,224 INFO L87 Difference]: Start difference. First operand 4448 states and 7128 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:25:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:58,405 INFO L93 Difference]: Finished difference Result 12382 states and 20190 transitions. [2022-11-23 15:25:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2022-11-23 15:25:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:58,464 INFO L225 Difference]: With dead ends: 12382 [2022-11-23 15:25:58,464 INFO L226 Difference]: Without dead ends: 7957 [2022-11-23 15:25:58,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:25:58,491 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1157 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:58,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 740 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:25:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2022-11-23 15:25:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 7495. [2022-11-23 15:25:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7495 states, 5225 states have (on average 1.569377990430622) internal successors, (8200), 5527 states have internal predecessors, (8200), 1770 states have call successors, (1770), 403 states have call predecessors, (1770), 499 states have return successors, (2121), 1664 states have call predecessors, (2121), 1765 states have call successors, (2121) [2022-11-23 15:25:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7495 states to 7495 states and 12091 transitions. [2022-11-23 15:25:59,323 INFO L78 Accepts]: Start accepts. Automaton has 7495 states and 12091 transitions. Word has length 105 [2022-11-23 15:25:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:59,324 INFO L495 AbstractCegarLoop]: Abstraction has 7495 states and 12091 transitions. [2022-11-23 15:25:59,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:25:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 7495 states and 12091 transitions. [2022-11-23 15:25:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-23 15:25:59,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:59,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:59,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:25:59,330 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:59,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1466883506, now seen corresponding path program 1 times [2022-11-23 15:25:59,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:59,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104818443] [2022-11-23 15:25:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:59,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:25:59,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:59,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104818443] [2022-11-23 15:25:59,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104818443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:59,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:59,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:25:59,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086185982] [2022-11-23 15:25:59,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:59,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:25:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:25:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:25:59,591 INFO L87 Difference]: Start difference. First operand 7495 states and 12091 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:26:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:02,441 INFO L93 Difference]: Finished difference Result 21659 states and 35934 transitions. [2022-11-23 15:26:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:26:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2022-11-23 15:26:02,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:02,529 INFO L225 Difference]: With dead ends: 21659 [2022-11-23 15:26:02,529 INFO L226 Difference]: Without dead ends: 14193 [2022-11-23 15:26:02,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:26:02,568 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1144 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:02,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1214 Valid, 749 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:26:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14193 states. [2022-11-23 15:26:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14193 to 13528. [2022-11-23 15:26:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 9436 states have (on average 1.5652818991097923) internal successors, (14770), 10034 states have internal predecessors, (14770), 3152 states have call successors, (3152), 727 states have call predecessors, (3152), 939 states have return successors, (4195), 2946 states have call predecessors, (4195), 3147 states have call successors, (4195) [2022-11-23 15:26:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 22117 transitions. [2022-11-23 15:26:04,209 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 22117 transitions. Word has length 106 [2022-11-23 15:26:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:04,210 INFO L495 AbstractCegarLoop]: Abstraction has 13528 states and 22117 transitions. [2022-11-23 15:26:04,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:26:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 22117 transitions. [2022-11-23 15:26:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 15:26:04,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:04,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:04,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:26:04,219 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1771524676, now seen corresponding path program 1 times [2022-11-23 15:26:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:04,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814139064] [2022-11-23 15:26:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:04,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:26:04,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814139064] [2022-11-23 15:26:04,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814139064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:04,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:26:04,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:26:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306697689] [2022-11-23 15:26:04,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:04,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:26:04,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:04,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:26:04,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:26:04,551 INFO L87 Difference]: Start difference. First operand 13528 states and 22117 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:26:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:08,310 INFO L93 Difference]: Finished difference Result 40040 states and 68589 transitions. [2022-11-23 15:26:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:26:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2022-11-23 15:26:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:08,607 INFO L225 Difference]: With dead ends: 40040 [2022-11-23 15:26:08,608 INFO L226 Difference]: Without dead ends: 26553 [2022-11-23 15:26:08,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:26:08,672 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1131 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:08,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 761 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 15:26:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26553 states. [2022-11-23 15:26:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26553 to 25453. [2022-11-23 15:26:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25453 states, 17739 states have (on average 1.5597271548565308) internal successors, (27668), 18957 states have internal predecessors, (27668), 5866 states have call successors, (5866), 1375 states have call predecessors, (5866), 1847 states have return successors, (9145), 5460 states have call predecessors, (9145), 5861 states have call successors, (9145) [2022-11-23 15:26:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25453 states to 25453 states and 42679 transitions. [2022-11-23 15:26:12,190 INFO L78 Accepts]: Start accepts. Automaton has 25453 states and 42679 transitions. Word has length 107 [2022-11-23 15:26:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:12,190 INFO L495 AbstractCegarLoop]: Abstraction has 25453 states and 42679 transitions. [2022-11-23 15:26:12,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:26:12,191 INFO L276 IsEmpty]: Start isEmpty. Operand 25453 states and 42679 transitions. [2022-11-23 15:26:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-23 15:26:12,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:12,194 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:12,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:26:12,195 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:12,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash 917040692, now seen corresponding path program 1 times [2022-11-23 15:26:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:12,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427938886] [2022-11-23 15:26:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:12,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:26:12,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:12,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427938886] [2022-11-23 15:26:12,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427938886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:12,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:26:12,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:26:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254811856] [2022-11-23 15:26:12,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:12,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:26:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:26:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:26:12,455 INFO L87 Difference]: Start difference. First operand 25453 states and 42679 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:26:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:18,553 INFO L93 Difference]: Finished difference Result 76578 states and 138763 transitions. [2022-11-23 15:26:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:26:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-11-23 15:26:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:18,873 INFO L225 Difference]: With dead ends: 76578 [2022-11-23 15:26:18,874 INFO L226 Difference]: Without dead ends: 51180 [2022-11-23 15:26:18,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:26:18,984 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1140 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:18,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 754 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 15:26:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51180 states. [2022-11-23 15:26:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51180 to 48821. [2022-11-23 15:26:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 34042 states have (on average 1.5571059279713295) internal successors, (53007), 36446 states have internal predecessors, (53007), 11180 states have call successors, (11180), 2661 states have call predecessors, (11180), 3598 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2022-11-23 15:26:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 84970 transitions. [2022-11-23 15:26:25,416 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 84970 transitions. Word has length 108 [2022-11-23 15:26:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:25,417 INFO L495 AbstractCegarLoop]: Abstraction has 48821 states and 84970 transitions. [2022-11-23 15:26:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:26:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 84970 transitions. [2022-11-23 15:26:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 15:26:25,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:25,431 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:25,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:26:25,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 399502305, now seen corresponding path program 1 times [2022-11-23 15:26:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:25,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762728585] [2022-11-23 15:26:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 15:26:25,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:25,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762728585] [2022-11-23 15:26:25,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762728585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:25,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:26:25,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:26:25,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806383529] [2022-11-23 15:26:25,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:25,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:26:25,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:25,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:26:25,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:26:25,975 INFO L87 Difference]: Start difference. First operand 48821 states and 84970 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:26:30,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:30,699 INFO L93 Difference]: Finished difference Result 99308 states and 178942 transitions. [2022-11-23 15:26:30,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:26:30,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2022-11-23 15:26:30,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:30,970 INFO L225 Difference]: With dead ends: 99308 [2022-11-23 15:26:30,970 INFO L226 Difference]: Without dead ends: 50504 [2022-11-23 15:26:31,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:26:31,341 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 30 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:31,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1672 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:26:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50504 states. [2022-11-23 15:26:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50504 to 49019. [2022-11-23 15:26:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49019 states, 34240 states have (on average 1.5538843457943925) internal successors, (53205), 36644 states have internal predecessors, (53205), 11180 states have call successors, (11180), 2661 states have call predecessors, (11180), 3598 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783)