./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:59:18,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:59:18,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:59:18,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:59:18,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:59:18,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:59:18,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:59:18,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:59:18,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:59:18,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:59:18,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:59:18,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:59:18,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:59:18,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:59:18,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:59:18,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:59:18,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:59:18,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:59:18,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:59:18,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:59:18,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:59:18,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:59:18,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:59:18,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:59:18,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:59:18,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:59:18,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:59:18,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:59:18,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:59:18,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:59:18,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:59:18,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:59:18,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:59:18,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:59:18,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:59:18,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:59:18,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:59:18,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:59:18,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:59:18,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:59:18,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:59:18,325 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:59:18,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:59:18,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:59:18,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:59:18,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:59:18,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:59:18,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:59:18,346 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:59:18,346 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:59:18,346 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:59:18,346 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:59:18,346 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:59:18,347 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:59:18,347 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:59:18,347 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:59:18,347 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:59:18,347 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:59:18,347 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:59:18,348 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:59:18,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:59:18,348 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:59:18,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:59:18,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:59:18,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:59:18,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:59:18,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:59:18,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:59:18,349 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:59:18,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:59:18,350 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:59:18,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:59:18,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:59:18,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:59:18,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:59:18,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:59:18,351 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:59:18,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:59:18,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:59:18,351 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:59:18,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:59:18,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:59:18,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:59:18,352 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_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 [2022-12-14 11:59:18,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:59:18,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:59:18,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:59:18,562 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:59:18,562 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:59:18,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2022-12-14 11:59:21,118 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:59:21,371 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:59:21,371 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2022-12-14 11:59:21,393 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/data/5f263405a/794270800a4244d7b81b4312ba45b20e/FLAG3de1c936d [2022-12-14 11:59:21,676 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/data/5f263405a/794270800a4244d7b81b4312ba45b20e [2022-12-14 11:59:21,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:59:21,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:59:21,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:59:21,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:59:21,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:59:21,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:59:21" (1/1) ... [2022-12-14 11:59:21,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ff23668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:21, skipping insertion in model container [2022-12-14 11:59:21,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:59:21" (1/1) ... [2022-12-14 11:59:21,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:59:21,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:59:21,971 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_457ee5ae-7558-4ee1-a074-60d1469bbf84/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2022-12-14 11:59:22,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:59:22,059 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:59:22,098 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_457ee5ae-7558-4ee1-a074-60d1469bbf84/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2022-12-14 11:59:22,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:59:22,142 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:59:22,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22 WrapperNode [2022-12-14 11:59:22,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:59:22,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:59:22,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:59:22,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:59:22,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,194 INFO L138 Inliner]: procedures = 96, calls = 346, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1134 [2022-12-14 11:59:22,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:59:22,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:59:22,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:59:22,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:59:22,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,228 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:59:22,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:59:22,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:59:22,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:59:22,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (1/1) ... [2022-12-14 11:59:22,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:59:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:59:22,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:59:22,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:59:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:59:22,296 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 11:59:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 11:59:22,296 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 11:59:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 11:59:22,296 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 11:59:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 11:59:22,296 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 11:59:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 11:59:22,296 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 11:59:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 11:59:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 11:59:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 11:59:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 11:59:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 11:59:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 11:59:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 11:59:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 11:59:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 11:59:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 11:59:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 11:59:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 11:59:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 11:59:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 11:59:22,298 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 11:59:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 11:59:22,306 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 11:59:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 11:59:22,306 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 11:59:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 11:59:22,307 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 11:59:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 11:59:22,307 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 11:59:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 11:59:22,307 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 11:59:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 11:59:22,307 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 11:59:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 11:59:22,308 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 11:59:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 11:59:22,308 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 11:59:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:59:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 11:59:22,308 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 11:59:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 11:59:22,308 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 11:59:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 11:59:22,309 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 11:59:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:59:22,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:59:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 11:59:22,309 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 11:59:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 11:59:22,309 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 11:59:22,433 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:59:22,434 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:59:23,110 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:59:23,562 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:59:23,562 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:59:23,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:59:23 BoogieIcfgContainer [2022-12-14 11:59:23,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:59:23,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:59:23,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:59:23,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:59:23,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:59:21" (1/3) ... [2022-12-14 11:59:23,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e41db9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:59:23, skipping insertion in model container [2022-12-14 11:59:23,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:59:22" (2/3) ... [2022-12-14 11:59:23,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e41db9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:59:23, skipping insertion in model container [2022-12-14 11:59:23,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:59:23" (3/3) ... [2022-12-14 11:59:23,574 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product20.cil.c [2022-12-14 11:59:23,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:59:23,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:59:23,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:59:23,651 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;@5adb0222, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:59:23,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:59:23,657 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) [2022-12-14 11:59:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 11:59:23,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:23,669 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] [2022-12-14 11:59:23,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:23,674 INFO L85 PathProgramCache]: Analyzing trace with hash -412004903, now seen corresponding path program 1 times [2022-12-14 11:59:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:23,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912735740] [2022-12-14 11:59:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:23,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:59:23,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:23,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912735740] [2022-12-14 11:59:23,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912735740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:23,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:23,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:59:23,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242820685] [2022-12-14 11:59:23,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:23,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 11:59:23,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:24,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 11:59:24,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:59:24,013 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) [2022-12-14 11:59:24,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:24,139 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-12-14 11:59:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 11:59:24,141 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 [2022-12-14 11:59:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:24,152 INFO L225 Difference]: With dead ends: 401 [2022-12-14 11:59:24,152 INFO L226 Difference]: Without dead ends: 379 [2022-12-14 11:59:24,154 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 [2022-12-14 11:59:24,157 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 [2022-12-14 11:59:24,157 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] [2022-12-14 11:59:24,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-12-14 11:59:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-12-14 11:59:24,215 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) [2022-12-14 11:59:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-12-14 11:59:24,221 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-12-14 11:59:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:24,223 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-12-14 11:59:24,223 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) [2022-12-14 11:59:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-12-14 11:59:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 11:59:24,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:24,226 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] [2022-12-14 11:59:24,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:59:24,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2039784009, now seen corresponding path program 1 times [2022-12-14 11:59:24,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:24,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784895157] [2022-12-14 11:59:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:24,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:59:24,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784895157] [2022-12-14 11:59:24,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784895157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:24,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:24,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:59:24,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967227763] [2022-12-14 11:59:24,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:24,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:59:24,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:59:24,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:59:24,520 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) [2022-12-14 11:59:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:26,075 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-12-14 11:59:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:59:26,076 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 [2022-12-14 11:59:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:26,083 INFO L225 Difference]: With dead ends: 1243 [2022-12-14 11:59:26,083 INFO L226 Difference]: Without dead ends: 880 [2022-12-14 11:59:26,087 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 [2022-12-14 11:59:26,088 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1225 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:26,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 1112 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 11:59:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-12-14 11:59:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-12-14 11:59:26,155 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) [2022-12-14 11:59:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-12-14 11:59:26,163 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-12-14 11:59:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:26,163 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-12-14 11:59:26,163 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) [2022-12-14 11:59:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-12-14 11:59:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 11:59:26,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:26,170 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] [2022-12-14 11:59:26,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:59:26,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:26,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash 234170480, now seen corresponding path program 1 times [2022-12-14 11:59:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:26,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562507312] [2022-12-14 11:59:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:59:26,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:26,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562507312] [2022-12-14 11:59:26,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562507312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:26,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:26,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:59:26,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244543799] [2022-12-14 11:59:26,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:26,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:59:26,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:59:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:59:26,600 INFO L87 Difference]: Start difference. First operand 793 states and 1277 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) [2022-12-14 11:59:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:28,128 INFO L93 Difference]: Finished difference Result 2479 states and 4037 transitions. [2022-12-14 11:59:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:59:28,129 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 [2022-12-14 11:59:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:28,136 INFO L225 Difference]: With dead ends: 2479 [2022-12-14 11:59:28,136 INFO L226 Difference]: Without dead ends: 1703 [2022-12-14 11:59:28,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:59:28,140 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1159 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:28,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1663 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2543 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 11:59:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-12-14 11:59:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1616. [2022-12-14 11:59:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1143 states have (on average 1.6071741032370954) internal successors, (1837), 1199 states have internal predecessors, (1837), 382 states have call successors, (382), 83 states have call predecessors, (382), 90 states have return successors, (409), 357 states have call predecessors, (409), 377 states have call successors, (409) [2022-12-14 11:59:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2628 transitions. [2022-12-14 11:59:28,233 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2628 transitions. Word has length 88 [2022-12-14 11:59:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:28,234 INFO L495 AbstractCegarLoop]: Abstraction has 1616 states and 2628 transitions. [2022-12-14 11:59:28,234 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) [2022-12-14 11:59:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2628 transitions. [2022-12-14 11:59:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 11:59:28,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:28,239 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] [2022-12-14 11:59:28,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:59:28,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash 82456025, now seen corresponding path program 1 times [2022-12-14 11:59:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:28,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715148295] [2022-12-14 11:59:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:28,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:59:28,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:28,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715148295] [2022-12-14 11:59:28,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715148295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:28,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:28,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:59:28,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657551288] [2022-12-14 11:59:28,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:28,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:59:28,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:28,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:59:28,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:59:28,437 INFO L87 Difference]: Start difference. First operand 1616 states and 2628 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) [2022-12-14 11:59:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:28,942 INFO L93 Difference]: Finished difference Result 1715 states and 2790 transitions. [2022-12-14 11:59:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:59:28,943 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 [2022-12-14 11:59:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:28,955 INFO L225 Difference]: With dead ends: 1715 [2022-12-14 11:59:28,955 INFO L226 Difference]: Without dead ends: 1700 [2022-12-14 11:59:28,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:59:28,958 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 690 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:28,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1848 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:59:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-12-14 11:59:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1622. [2022-12-14 11:59:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1149 states have (on average 1.6040034812880766) internal successors, (1843), 1205 states have internal predecessors, (1843), 382 states have call successors, (382), 83 states have call predecessors, (382), 90 states have return successors, (409), 357 states have call predecessors, (409), 377 states have call successors, (409) [2022-12-14 11:59:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2634 transitions. [2022-12-14 11:59:29,054 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2634 transitions. Word has length 92 [2022-12-14 11:59:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:29,055 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2634 transitions. [2022-12-14 11:59:29,055 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) [2022-12-14 11:59:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2634 transitions. [2022-12-14 11:59:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 11:59:29,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:29,058 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] [2022-12-14 11:59:29,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:59:29,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1545960171, now seen corresponding path program 1 times [2022-12-14 11:59:29,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:29,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904597919] [2022-12-14 11:59:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:29,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:59:29,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904597919] [2022-12-14 11:59:29,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904597919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:29,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:29,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:59:29,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099912504] [2022-12-14 11:59:29,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:29,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:59:29,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:29,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:59:29,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:59:29,251 INFO L87 Difference]: Start difference. First operand 1622 states and 2634 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:59:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:29,697 INFO L93 Difference]: Finished difference Result 1762 states and 2832 transitions. [2022-12-14 11:59:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 11:59:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-12-14 11:59:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:29,704 INFO L225 Difference]: With dead ends: 1762 [2022-12-14 11:59:29,705 INFO L226 Difference]: Without dead ends: 1747 [2022-12-14 11:59:29,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:59:29,706 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 623 mSDsluCounter, 2192 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:29,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 2765 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:59:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-12-14 11:59:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1698. [2022-12-14 11:59:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1201 states have (on average 1.5928393005828476) internal successors, (1913), 1257 states have internal predecessors, (1913), 398 states have call successors, (398), 91 states have call predecessors, (398), 98 states have return successors, (433), 373 states have call predecessors, (433), 393 states have call successors, (433) [2022-12-14 11:59:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2744 transitions. [2022-12-14 11:59:29,786 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2744 transitions. Word has length 97 [2022-12-14 11:59:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:29,786 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2744 transitions. [2022-12-14 11:59:29,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:59:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2744 transitions. [2022-12-14 11:59:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 11:59:29,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:29,789 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] [2022-12-14 11:59:29,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:59:29,789 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:29,789 INFO L85 PathProgramCache]: Analyzing trace with hash -303166623, now seen corresponding path program 1 times [2022-12-14 11:59:29,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:29,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811232979] [2022-12-14 11:59:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:29,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:59:29,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:29,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811232979] [2022-12-14 11:59:29,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811232979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:29,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:29,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:59:29,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786045128] [2022-12-14 11:59:29,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:29,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:59:29,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:59:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:59:29,954 INFO L87 Difference]: Start difference. First operand 1698 states and 2744 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) [2022-12-14 11:59:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:31,071 INFO L93 Difference]: Finished difference Result 4640 states and 7623 transitions. [2022-12-14 11:59:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:59:31,072 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 [2022-12-14 11:59:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:31,088 INFO L225 Difference]: With dead ends: 4640 [2022-12-14 11:59:31,088 INFO L226 Difference]: Without dead ends: 2958 [2022-12-14 11:59:31,095 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 [2022-12-14 11:59:31,095 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1169 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:31,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 730 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:59:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2022-12-14 11:59:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2696. [2022-12-14 11:59:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 1910 states have (on average 1.5853403141361258) internal successors, (3028), 2002 states have internal predecessors, (3028), 624 states have call successors, (624), 140 states have call predecessors, (624), 161 states have return successors, (730), 586 states have call predecessors, (730), 619 states have call successors, (730) [2022-12-14 11:59:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 4382 transitions. [2022-12-14 11:59:31,229 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 4382 transitions. Word has length 104 [2022-12-14 11:59:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:31,229 INFO L495 AbstractCegarLoop]: Abstraction has 2696 states and 4382 transitions. [2022-12-14 11:59:31,229 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) [2022-12-14 11:59:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 4382 transitions. [2022-12-14 11:59:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 11:59:31,232 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:31,232 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] [2022-12-14 11:59:31,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:59:31,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1241764041, now seen corresponding path program 1 times [2022-12-14 11:59:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:31,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109521692] [2022-12-14 11:59:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:31,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:59:31,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:31,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109521692] [2022-12-14 11:59:31,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109521692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:31,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:31,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 11:59:31,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350068696] [2022-12-14 11:59:31,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:31,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:59:31,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:59:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:59:31,516 INFO L87 Difference]: Start difference. First operand 2696 states and 4382 transitions. Second operand has 9 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 11:59:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:33,531 INFO L93 Difference]: Finished difference Result 6714 states and 10924 transitions. [2022-12-14 11:59:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 11:59:33,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 104 [2022-12-14 11:59:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:33,543 INFO L225 Difference]: With dead ends: 6714 [2022-12-14 11:59:33,543 INFO L226 Difference]: Without dead ends: 4034 [2022-12-14 11:59:33,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-12-14 11:59:33,552 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 1002 mSDsluCounter, 2202 mSDsCounter, 0 mSdLazyCounter, 4939 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 5331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 4939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:33,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 2787 Invalid, 5331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 4939 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 11:59:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2022-12-14 11:59:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 3926. [2022-12-14 11:59:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 2756 states have (on average 1.5711175616835995) internal successors, (4330), 2886 states have internal predecessors, (4330), 922 states have call successors, (922), 203 states have call predecessors, (922), 247 states have return successors, (1078), 881 states have call predecessors, (1078), 917 states have call successors, (1078) [2022-12-14 11:59:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 6330 transitions. [2022-12-14 11:59:33,753 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 6330 transitions. Word has length 104 [2022-12-14 11:59:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:33,753 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 6330 transitions. [2022-12-14 11:59:33,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 11:59:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 6330 transitions. [2022-12-14 11:59:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 11:59:33,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:33,756 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] [2022-12-14 11:59:33,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:59:33,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash -808511679, now seen corresponding path program 1 times [2022-12-14 11:59:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:33,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644570164] [2022-12-14 11:59:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:33,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:59:33,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:33,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644570164] [2022-12-14 11:59:33,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644570164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:33,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:33,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:59:33,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320135682] [2022-12-14 11:59:33,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:33,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:59:33,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:33,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:59:33,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:59:33,897 INFO L87 Difference]: Start difference. First operand 3926 states and 6330 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) [2022-12-14 11:59:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:35,353 INFO L93 Difference]: Finished difference Result 11025 states and 18284 transitions. [2022-12-14 11:59:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:59:35,354 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 [2022-12-14 11:59:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:35,382 INFO L225 Difference]: With dead ends: 11025 [2022-12-14 11:59:35,382 INFO L226 Difference]: Without dead ends: 7118 [2022-12-14 11:59:35,394 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 [2022-12-14 11:59:35,395 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1156 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:35,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 742 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 11:59:35,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2022-12-14 11:59:35,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 6647. [2022-12-14 11:59:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6647 states, 4675 states have (on average 1.5670588235294118) internal successors, (7326), 4923 states have internal predecessors, (7326), 1532 states have call successors, (1532), 343 states have call predecessors, (1532), 439 states have return successors, (1994), 1455 states have call predecessors, (1994), 1527 states have call successors, (1994) [2022-12-14 11:59:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6647 states to 6647 states and 10852 transitions. [2022-12-14 11:59:35,796 INFO L78 Accepts]: Start accepts. Automaton has 6647 states and 10852 transitions. Word has length 105 [2022-12-14 11:59:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:35,797 INFO L495 AbstractCegarLoop]: Abstraction has 6647 states and 10852 transitions. [2022-12-14 11:59:35,797 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) [2022-12-14 11:59:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 6647 states and 10852 transitions. [2022-12-14 11:59:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 11:59:35,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:35,801 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] [2022-12-14 11:59:35,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 11:59:35,801 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:35,801 INFO L85 PathProgramCache]: Analyzing trace with hash 705664675, now seen corresponding path program 1 times [2022-12-14 11:59:35,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:35,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337685858] [2022-12-14 11:59:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:35,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:59:36,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:36,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337685858] [2022-12-14 11:59:36,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337685858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:36,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:36,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:59:36,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851171585] [2022-12-14 11:59:36,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:36,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:59:36,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:36,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:59:36,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:59:36,013 INFO L87 Difference]: Start difference. First operand 6647 states and 10852 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) [2022-12-14 11:59:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:37,524 INFO L93 Difference]: Finished difference Result 19370 states and 33133 transitions. [2022-12-14 11:59:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:59:37,525 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 [2022-12-14 11:59:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:37,582 INFO L225 Difference]: With dead ends: 19370 [2022-12-14 11:59:37,582 INFO L226 Difference]: Without dead ends: 12748 [2022-12-14 11:59:37,602 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 [2022-12-14 11:59:37,603 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1143 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:37,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 754 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:59:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12748 states. [2022-12-14 11:59:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12748 to 12032. [2022-12-14 11:59:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12032 states, 8462 states have (on average 1.5613330181990073) internal successors, (13212), 8962 states have internal predecessors, (13212), 2730 states have call successors, (2730), 623 states have call predecessors, (2730), 839 states have return successors, (4188), 2581 states have call predecessors, (4188), 2725 states have call successors, (4188) [2022-12-14 11:59:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12032 states to 12032 states and 20130 transitions. [2022-12-14 11:59:38,344 INFO L78 Accepts]: Start accepts. Automaton has 12032 states and 20130 transitions. Word has length 106 [2022-12-14 11:59:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:38,345 INFO L495 AbstractCegarLoop]: Abstraction has 12032 states and 20130 transitions. [2022-12-14 11:59:38,345 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) [2022-12-14 11:59:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 12032 states and 20130 transitions. [2022-12-14 11:59:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 11:59:38,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:38,348 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] [2022-12-14 11:59:38,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 11:59:38,348 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:38,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:38,348 INFO L85 PathProgramCache]: Analyzing trace with hash 400495299, now seen corresponding path program 1 times [2022-12-14 11:59:38,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:38,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646521341] [2022-12-14 11:59:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:38,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:59:38,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646521341] [2022-12-14 11:59:38,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646521341] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:38,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:38,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:59:38,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024097721] [2022-12-14 11:59:38,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:38,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:59:38,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:38,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:59:38,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:59:38,525 INFO L87 Difference]: Start difference. First operand 12032 states and 20130 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) [2022-12-14 11:59:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:40,875 INFO L93 Difference]: Finished difference Result 35899 states and 64844 transitions. [2022-12-14 11:59:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:59:40,876 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 [2022-12-14 11:59:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:40,963 INFO L225 Difference]: With dead ends: 35899 [2022-12-14 11:59:40,963 INFO L226 Difference]: Without dead ends: 23904 [2022-12-14 11:59:41,003 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 [2022-12-14 11:59:41,004 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1130 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:41,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 763 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:59:41,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23904 states. [2022-12-14 11:59:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23904 to 22669. [2022-12-14 11:59:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22669 states, 15921 states have (on average 1.5542993530557125) internal successors, (24746), 16957 states have internal predecessors, (24746), 5076 states have call successors, (5076), 1183 states have call predecessors, (5076), 1671 states have return successors, (9822), 4783 states have call predecessors, (9822), 5071 states have call successors, (9822) [2022-12-14 11:59:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22669 states to 22669 states and 39644 transitions. [2022-12-14 11:59:42,612 INFO L78 Accepts]: Start accepts. Automaton has 22669 states and 39644 transitions. Word has length 107 [2022-12-14 11:59:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:42,612 INFO L495 AbstractCegarLoop]: Abstraction has 22669 states and 39644 transitions. [2022-12-14 11:59:42,613 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) [2022-12-14 11:59:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 22669 states and 39644 transitions. [2022-12-14 11:59:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 11:59:42,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:42,615 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] [2022-12-14 11:59:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 11:59:42,615 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -469816859, now seen corresponding path program 1 times [2022-12-14 11:59:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:42,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210634530] [2022-12-14 11:59:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:59:42,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:42,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210634530] [2022-12-14 11:59:42,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210634530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:42,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:42,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:59:42,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620456697] [2022-12-14 11:59:42,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:42,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:59:42,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:59:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:59:42,758 INFO L87 Difference]: Start difference. First operand 22669 states and 39644 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) [2022-12-14 11:59:46,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:46,844 INFO L93 Difference]: Finished difference Result 68745 states and 135984 transitions. [2022-12-14 11:59:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:59:46,845 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 [2022-12-14 11:59:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:47,060 INFO L225 Difference]: With dead ends: 68745 [2022-12-14 11:59:47,060 INFO L226 Difference]: Without dead ends: 46127 [2022-12-14 11:59:47,142 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 [2022-12-14 11:59:47,143 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1140 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:47,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 754 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:59:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46127 states. [2022-12-14 11:59:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46127 to 43534. [2022-12-14 11:59:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43534 states, 30614 states have (on average 1.5510550728424903) internal successors, (47484), 32658 states have internal predecessors, (47484), 9655 states have call successors, (9655), 2295 states have call predecessors, (9655), 3264 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-12-14 11:59:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43534 states to 43534 states and 80890 transitions. [2022-12-14 11:59:50,922 INFO L78 Accepts]: Start accepts. Automaton has 43534 states and 80890 transitions. Word has length 108 [2022-12-14 11:59:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:50,922 INFO L495 AbstractCegarLoop]: Abstraction has 43534 states and 80890 transitions. [2022-12-14 11:59:50,922 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) [2022-12-14 11:59:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 43534 states and 80890 transitions. [2022-12-14 11:59:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 11:59:50,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:50,928 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] [2022-12-14 11:59:50,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 11:59:50,928 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1925020149, now seen corresponding path program 1 times [2022-12-14 11:59:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:50,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586952060] [2022-12-14 11:59:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:50,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 11:59:51,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:51,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586952060] [2022-12-14 11:59:51,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586952060] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:51,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:51,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:59:51,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173688544] [2022-12-14 11:59:51,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:51,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:59:51,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:51,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:59:51,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:59:51,065 INFO L87 Difference]: Start difference. First operand 43534 states and 80890 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) [2022-12-14 11:59:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:53,759 INFO L93 Difference]: Finished difference Result 88668 states and 173312 transitions. [2022-12-14 11:59:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:59:53,760 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 [2022-12-14 11:59:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:53,945 INFO L225 Difference]: With dead ends: 88668 [2022-12-14 11:59:53,945 INFO L226 Difference]: Without dead ends: 45151 [2022-12-14 11:59:54,101 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 [2022-12-14 11:59:54,102 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 30 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1669 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 [2022-12-14 11:59:54,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1669 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:59:54,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45151 states. [2022-12-14 11:59:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45151 to 43732. [2022-12-14 11:59:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43732 states, 30812 states have (on average 1.5475139556017137) internal successors, (47682), 32856 states have internal predecessors, (47682), 9655 states have call successors, (9655), 2295 states have call predecessors, (9655), 3264 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-12-14 11:59:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43732 states to 43732 states and 81088 transitions. [2022-12-14 11:59:57,908 INFO L78 Accepts]: Start accepts. Automaton has 43732 states and 81088 transitions. Word has length 156 [2022-12-14 11:59:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:57,909 INFO L495 AbstractCegarLoop]: Abstraction has 43732 states and 81088 transitions. [2022-12-14 11:59:57,909 INFO L496 AbstractCegarLoop]: INTERPOLANT 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) [2022-12-14 11:59:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 43732 states and 81088 transitions. [2022-12-14 11:59:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 11:59:57,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:57,915 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:59:57,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 11:59:57,916 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:59:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1853500887, now seen corresponding path program 1 times [2022-12-14 11:59:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:59:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722846643] [2022-12-14 11:59:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:59:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 11:59:58,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:59:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722846643] [2022-12-14 11:59:58,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722846643] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:59:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160493501] [2022-12-14 11:59:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:58,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:59:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:59:58,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:59:58,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:59:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:58,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:59:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:59:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 11:59:58,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:59:58,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160493501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:58,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:59:58,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 11:59:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138797108] [2022-12-14 11:59:58,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:58,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:59:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:59:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:59:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:59:58,452 INFO L87 Difference]: Start difference. First operand 43732 states and 81088 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:00:01,122 INFO L93 Difference]: Finished difference Result 90021 states and 176711 transitions. [2022-12-14 12:00:01,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:00:01,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 159 [2022-12-14 12:00:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:00:01,340 INFO L225 Difference]: With dead ends: 90021 [2022-12-14 12:00:01,340 INFO L226 Difference]: Without dead ends: 46306 [2022-12-14 12:00:01,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:00:01,510 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 213 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:00:01,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1461 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:00:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46306 states. [2022-12-14 12:00:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46306 to 46306. [2022-12-14 12:00:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46306 states, 33320 states have (on average 1.5756302521008403) internal successors, (52500), 35364 states have internal predecessors, (52500), 9655 states have call successors, (9655), 2361 states have call predecessors, (9655), 3330 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-12-14 12:00:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46306 states to 46306 states and 85906 transitions. [2022-12-14 12:00:05,193 INFO L78 Accepts]: Start accepts. Automaton has 46306 states and 85906 transitions. Word has length 159 [2022-12-14 12:00:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:00:05,194 INFO L495 AbstractCegarLoop]: Abstraction has 46306 states and 85906 transitions. [2022-12-14 12:00:05,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 46306 states and 85906 transitions. [2022-12-14 12:00:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 12:00:05,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:00:05,200 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:00:05,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:00:05,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:00:05,402 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:00:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:00:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1080276694, now seen corresponding path program 1 times [2022-12-14 12:00:05,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:00:05,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726867310] [2022-12-14 12:00:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:05,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:00:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 12:00:05,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:00:05,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726867310] [2022-12-14 12:00:05,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726867310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:00:05,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279288240] [2022-12-14 12:00:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:05,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:00:05,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:00:05,543 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:00:05,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:00:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:05,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:00:05,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:00:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:00:05,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:00:05,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279288240] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:00:05,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:00:05,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 12:00:05,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989478203] [2022-12-14 12:00:05,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:00:05,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:00:05,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:00:05,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:00:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:00:05,904 INFO L87 Difference]: Start difference. First operand 46306 states and 85906 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:00:08,687 INFO L93 Difference]: Finished difference Result 95169 states and 186149 transitions. [2022-12-14 12:00:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:00:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 164 [2022-12-14 12:00:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:00:08,893 INFO L225 Difference]: With dead ends: 95169 [2022-12-14 12:00:08,893 INFO L226 Difference]: Without dead ends: 48880 [2022-12-14 12:00:09,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:00:09,065 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 211 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:00:09,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1461 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:00:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48880 states. [2022-12-14 12:00:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48880 to 48880. [2022-12-14 12:00:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48880 states, 35828 states have (on average 1.5998102043094786) internal successors, (57318), 37872 states have internal predecessors, (57318), 9655 states have call successors, (9655), 2427 states have call predecessors, (9655), 3396 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-12-14 12:00:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48880 states to 48880 states and 90724 transitions. [2022-12-14 12:00:12,152 INFO L78 Accepts]: Start accepts. Automaton has 48880 states and 90724 transitions. Word has length 164 [2022-12-14 12:00:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:00:12,153 INFO L495 AbstractCegarLoop]: Abstraction has 48880 states and 90724 transitions. [2022-12-14 12:00:12,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 48880 states and 90724 transitions. [2022-12-14 12:00:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 12:00:12,159 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:00:12,159 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:00:12,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:00:12,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:00:12,360 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:00:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:00:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1411615002, now seen corresponding path program 1 times [2022-12-14 12:00:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:00:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299567586] [2022-12-14 12:00:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:12,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:00:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 12:00:12,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:00:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299567586] [2022-12-14 12:00:12,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299567586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:00:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113412534] [2022-12-14 12:00:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:12,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:00:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:00:12,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:00:12,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:00:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:12,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:00:12,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:00:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:00:12,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:00:12,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113412534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:00:12,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:00:12,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 12:00:12,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931027624] [2022-12-14 12:00:12,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:00:12,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:00:12,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:00:12,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:00:12,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:00:12,773 INFO L87 Difference]: Start difference. First operand 48880 states and 90724 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:00:15,545 INFO L93 Difference]: Finished difference Result 100317 states and 195587 transitions. [2022-12-14 12:00:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:00:15,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 168 [2022-12-14 12:00:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:00:15,733 INFO L225 Difference]: With dead ends: 100317 [2022-12-14 12:00:15,733 INFO L226 Difference]: Without dead ends: 51454 [2022-12-14 12:00:15,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:00:15,884 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 209 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:00:15,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1461 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:00:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51454 states. [2022-12-14 12:00:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51454 to 51454. [2022-12-14 12:00:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51454 states, 38336 states have (on average 1.6208263772954925) internal successors, (62136), 40380 states have internal predecessors, (62136), 9655 states have call successors, (9655), 2493 states have call predecessors, (9655), 3462 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-12-14 12:00:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51454 states to 51454 states and 95542 transitions. [2022-12-14 12:00:18,920 INFO L78 Accepts]: Start accepts. Automaton has 51454 states and 95542 transitions. Word has length 168 [2022-12-14 12:00:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:00:18,921 INFO L495 AbstractCegarLoop]: Abstraction has 51454 states and 95542 transitions. [2022-12-14 12:00:18,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 51454 states and 95542 transitions. [2022-12-14 12:00:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 12:00:18,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:00:18,927 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:00:18,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:00:19,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:00:19,129 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:00:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:00:19,130 INFO L85 PathProgramCache]: Analyzing trace with hash 728688451, now seen corresponding path program 1 times [2022-12-14 12:00:19,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:00:19,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882283524] [2022-12-14 12:00:19,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:19,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:00:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 12:00:19,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:00:19,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882283524] [2022-12-14 12:00:19,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882283524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:00:19,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361752568] [2022-12-14 12:00:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:19,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:00:19,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:00:19,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:00:19,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:00:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:19,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 2122 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:00:19,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:00:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 12:00:19,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:00:19,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361752568] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:00:19,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:00:19,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 12:00:19,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675436864] [2022-12-14 12:00:19,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:00:19,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:00:19,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:00:19,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:00:19,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:00:19,540 INFO L87 Difference]: Start difference. First operand 51454 states and 95542 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:00:22,558 INFO L93 Difference]: Finished difference Result 105465 states and 205025 transitions. [2022-12-14 12:00:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:00:22,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 171 [2022-12-14 12:00:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:00:22,793 INFO L225 Difference]: With dead ends: 105465 [2022-12-14 12:00:22,793 INFO L226 Difference]: Without dead ends: 54028 [2022-12-14 12:00:22,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:00:22,973 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 207 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:00:22,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1461 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:00:23,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54028 states. [2022-12-14 12:00:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54028 to 54028. [2022-12-14 12:00:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54028 states, 40844 states have (on average 1.6392615806483204) internal successors, (66954), 42888 states have internal predecessors, (66954), 9655 states have call successors, (9655), 2559 states have call predecessors, (9655), 3528 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-12-14 12:00:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54028 states to 54028 states and 100360 transitions. [2022-12-14 12:00:26,111 INFO L78 Accepts]: Start accepts. Automaton has 54028 states and 100360 transitions. Word has length 171 [2022-12-14 12:00:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:00:26,112 INFO L495 AbstractCegarLoop]: Abstraction has 54028 states and 100360 transitions. [2022-12-14 12:00:26,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 54028 states and 100360 transitions. [2022-12-14 12:00:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 12:00:26,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:00:26,118 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:00:26,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:00:26,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:00:26,320 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:00:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:00:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash -736800077, now seen corresponding path program 1 times [2022-12-14 12:00:26,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:00:26,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556584868] [2022-12-14 12:00:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:26,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:00:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 12:00:26,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:00:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556584868] [2022-12-14 12:00:26,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556584868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:00:26,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:00:26,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:00:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704062663] [2022-12-14 12:00:26,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:00:26,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:00:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:00:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:00:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:00:26,459 INFO L87 Difference]: Start difference. First operand 54028 states and 100360 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:00:29,232 INFO L93 Difference]: Finished difference Result 110811 states and 215054 transitions. [2022-12-14 12:00:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:00:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 173 [2022-12-14 12:00:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:00:29,463 INFO L225 Difference]: With dead ends: 110811 [2022-12-14 12:00:29,463 INFO L226 Difference]: Without dead ends: 56272 [2022-12-14 12:00:29,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:00:29,652 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 99 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:00:29,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1474 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:00:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56272 states. [2022-12-14 12:00:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56272 to 56272. [2022-12-14 12:00:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56272 states, 43022 states have (on average 1.5838873134675282) internal successors, (68142), 45066 states have internal predecessors, (68142), 9655 states have call successors, (9655), 2625 states have call predecessors, (9655), 3594 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-12-14 12:00:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56272 states to 56272 states and 101548 transitions. [2022-12-14 12:00:32,919 INFO L78 Accepts]: Start accepts. Automaton has 56272 states and 101548 transitions. Word has length 173 [2022-12-14 12:00:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:00:32,919 INFO L495 AbstractCegarLoop]: Abstraction has 56272 states and 101548 transitions. [2022-12-14 12:00:32,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:00:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 56272 states and 101548 transitions. [2022-12-14 12:00:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 12:00:32,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:00:32,925 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:00:32,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 12:00:32,925 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:00:32,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:00:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1603624926, now seen corresponding path program 1 times [2022-12-14 12:00:32,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:00:32,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940411602] [2022-12-14 12:00:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:32,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:00:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 12:00:33,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:00:33,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940411602] [2022-12-14 12:00:33,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940411602] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:00:33,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:00:33,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:00:33,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424503022] [2022-12-14 12:00:33,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:00:33,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:00:33,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:00:33,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:00:33,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:00:33,178 INFO L87 Difference]: Start difference. First operand 56272 states and 101548 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 6 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 12:00:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:00:38,911 INFO L93 Difference]: Finished difference Result 138083 states and 263079 transitions. [2022-12-14 12:00:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 12:00:38,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 6 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) Word has length 173 [2022-12-14 12:00:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:00:39,215 INFO L225 Difference]: With dead ends: 138083 [2022-12-14 12:00:39,215 INFO L226 Difference]: Without dead ends: 75755 [2022-12-14 12:00:39,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:00:39,507 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 1622 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 4451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:00:39,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 1943 Invalid, 4451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:00:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75755 states. [2022-12-14 12:00:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75755 to 70364. [2022-12-14 12:00:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70364 states, 52338 states have (on average 1.5191065764836256) internal successors, (79507), 55084 states have internal predecessors, (79507), 12845 states have call successors, (12845), 3914 states have call predecessors, (12845), 5180 states have return successors, (28391), 11870 states have call predecessors, (28391), 12840 states have call successors, (28391) [2022-12-14 12:00:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70364 states to 70364 states and 120743 transitions. [2022-12-14 12:00:44,256 INFO L78 Accepts]: Start accepts. Automaton has 70364 states and 120743 transitions. Word has length 173 [2022-12-14 12:00:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:00:44,257 INFO L495 AbstractCegarLoop]: Abstraction has 70364 states and 120743 transitions. [2022-12-14 12:00:44,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 6 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 12:00:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 70364 states and 120743 transitions. [2022-12-14 12:00:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 12:00:44,264 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:00:44,264 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:00:44,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 12:00:44,264 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:00:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:00:44,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1793596554, now seen corresponding path program 1 times [2022-12-14 12:00:44,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:00:44,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031285865] [2022-12-14 12:00:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:00:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 12:00:44,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:00:44,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031285865] [2022-12-14 12:00:44,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031285865] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:00:44,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:00:44,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:00:44,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852137825] [2022-12-14 12:00:44,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:00:44,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:00:44,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:00:44,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:00:44,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:00:44,518 INFO L87 Difference]: Start difference. First operand 70364 states and 120743 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 5 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 12:00:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:00:50,658 INFO L93 Difference]: Finished difference Result 157985 states and 277757 transitions. [2022-12-14 12:00:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:00:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 5 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) Word has length 174 [2022-12-14 12:00:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:00:50,979 INFO L225 Difference]: With dead ends: 157985 [2022-12-14 12:00:50,979 INFO L226 Difference]: Without dead ends: 87638 [2022-12-14 12:00:51,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:00:51,242 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 1134 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 3949 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 4453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 3949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:00:51,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1470 Invalid, 4453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 3949 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 12:00:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87638 states. [2022-12-14 12:00:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87638 to 81325. [2022-12-14 12:00:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81325 states, 62690 states have (on average 1.5342797894401021) internal successors, (96184), 65724 states have internal predecessors, (96184), 12947 states have call successors, (12947), 4114 states have call predecessors, (12947), 5687 states have return successors, (22636), 12032 states have call predecessors, (22636), 12942 states have call successors, (22636) [2022-12-14 12:00:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81325 states to 81325 states and 131767 transitions. [2022-12-14 12:00:55,791 INFO L78 Accepts]: Start accepts. Automaton has 81325 states and 131767 transitions. Word has length 174 [2022-12-14 12:00:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:00:55,791 INFO L495 AbstractCegarLoop]: Abstraction has 81325 states and 131767 transitions. [2022-12-14 12:00:55,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 5 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 12:00:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 81325 states and 131767 transitions. [2022-12-14 12:00:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 12:00:55,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:00:55,797 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:00:55,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 12:00:55,797 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:00:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:00:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1297095866, now seen corresponding path program 1 times [2022-12-14 12:00:55,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:00:55,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419317001] [2022-12-14 12:00:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:00:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:00:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:00:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 12:00:56,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:00:56,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419317001] [2022-12-14 12:00:56,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419317001] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:00:56,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:00:56,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:00:56,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632106243] [2022-12-14 12:00:56,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:00:56,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:00:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:00:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:00:56,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:00:56,332 INFO L87 Difference]: Start difference. First operand 81325 states and 131767 transitions. Second operand has 8 states, 5 states have (on average 18.6) internal successors, (93), 7 states have internal predecessors, (93), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 12:01:02,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:01:02,928 INFO L93 Difference]: Finished difference Result 200712 states and 328959 transitions. [2022-12-14 12:01:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:01:02,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 18.6) internal successors, (93), 7 states have internal predecessors, (93), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 176 [2022-12-14 12:01:02,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:01:03,380 INFO L225 Difference]: With dead ends: 200712 [2022-12-14 12:01:03,381 INFO L226 Difference]: Without dead ends: 122089 [2022-12-14 12:01:03,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:01:03,569 INFO L413 NwaCegarLoop]: 1067 mSDtfsCounter, 959 mSDsluCounter, 4746 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 5813 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:01:03,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 5813 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:01:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122089 states. [2022-12-14 12:01:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122089 to 121915. [2022-12-14 12:01:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121915 states, 93765 states have (on average 1.5323414920279421) internal successors, (143680), 98238 states have internal predecessors, (143680), 19706 states have call successors, (19706), 6128 states have call predecessors, (19706), 8443 states have return successors, (35893), 18388 states have call predecessors, (35893), 19701 states have call successors, (35893) [2022-12-14 12:01:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121915 states to 121915 states and 199279 transitions. [2022-12-14 12:01:10,360 INFO L78 Accepts]: Start accepts. Automaton has 121915 states and 199279 transitions. Word has length 176 [2022-12-14 12:01:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:01:10,361 INFO L495 AbstractCegarLoop]: Abstraction has 121915 states and 199279 transitions. [2022-12-14 12:01:10,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 18.6) internal successors, (93), 7 states have internal predecessors, (93), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 12:01:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 121915 states and 199279 transitions. [2022-12-14 12:01:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 12:01:10,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:01:10,368 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:01:10,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 12:01:10,368 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:01:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:01:10,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1622277334, now seen corresponding path program 1 times [2022-12-14 12:01:10,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:01:10,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712925870] [2022-12-14 12:01:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:10,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:01:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:01:10,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:01:10,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712925870] [2022-12-14 12:01:10,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712925870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:01:10,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:01:10,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 12:01:10,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589971666] [2022-12-14 12:01:10,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:01:10,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:01:10,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:01:10,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:01:10,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:01:10,799 INFO L87 Difference]: Start difference. First operand 121915 states and 199279 transitions. Second operand has 11 states, 9 states have (on average 10.555555555555555) internal successors, (95), 10 states have internal predecessors, (95), 6 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 12:01:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:01:21,470 INFO L93 Difference]: Finished difference Result 259520 states and 460800 transitions. [2022-12-14 12:01:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 12:01:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.555555555555555) internal successors, (95), 10 states have internal predecessors, (95), 6 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) Word has length 176 [2022-12-14 12:01:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:01:22,148 INFO L225 Difference]: With dead ends: 259520 [2022-12-14 12:01:22,148 INFO L226 Difference]: Without dead ends: 131051 [2022-12-14 12:01:22,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:01:22,619 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 1982 mSDsluCounter, 2314 mSDsCounter, 0 mSdLazyCounter, 5755 mSolverCounterSat, 1189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 6944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1189 IncrementalHoareTripleChecker+Valid, 5755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:01:22,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2043 Valid, 2859 Invalid, 6944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1189 Valid, 5755 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 12:01:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131051 states. [2022-12-14 12:01:29,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131051 to 119747. [2022-12-14 12:01:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119747 states, 92292 states have (on average 1.5367204091362199) internal successors, (141827), 96835 states have internal predecessors, (141827), 19329 states have call successors, (19329), 6116 states have call predecessors, (19329), 8125 states have return successors, (32763), 17648 states have call predecessors, (32763), 19324 states have call successors, (32763) [2022-12-14 12:01:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119747 states to 119747 states and 193919 transitions. [2022-12-14 12:01:30,124 INFO L78 Accepts]: Start accepts. Automaton has 119747 states and 193919 transitions. Word has length 176 [2022-12-14 12:01:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:01:30,125 INFO L495 AbstractCegarLoop]: Abstraction has 119747 states and 193919 transitions. [2022-12-14 12:01:30,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.555555555555555) internal successors, (95), 10 states have internal predecessors, (95), 6 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 12:01:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 119747 states and 193919 transitions. [2022-12-14 12:01:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 12:01:30,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:01:30,133 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:01:30,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 12:01:30,134 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:01:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:01:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1276249968, now seen corresponding path program 1 times [2022-12-14 12:01:30,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:01:30,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207287795] [2022-12-14 12:01:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:30,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:01:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 12:01:30,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:01:30,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207287795] [2022-12-14 12:01:30,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207287795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:01:30,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:01:30,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:01:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716503967] [2022-12-14 12:01:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:01:30,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:01:30,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:01:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:01:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:01:30,484 INFO L87 Difference]: Start difference. First operand 119747 states and 193919 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 12:01:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:01:39,240 INFO L93 Difference]: Finished difference Result 249734 states and 425252 transitions. [2022-12-14 12:01:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:01:39,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) Word has length 177 [2022-12-14 12:01:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:01:39,798 INFO L225 Difference]: With dead ends: 249734 [2022-12-14 12:01:39,799 INFO L226 Difference]: Without dead ends: 124344 [2022-12-14 12:01:40,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:01:40,218 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 1331 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 3319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:01:40,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1412 Valid, 1391 Invalid, 3319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 12:01:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124344 states. [2022-12-14 12:01:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124344 to 119942. [2022-12-14 12:01:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119942 states, 92447 states have (on average 1.5360909494088504) internal successors, (142007), 97000 states have internal predecessors, (142007), 19351 states have call successors, (19351), 6134 states have call predecessors, (19351), 8143 states have return successors, (32785), 17660 states have call predecessors, (32785), 19346 states have call successors, (32785) [2022-12-14 12:01:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119942 states to 119942 states and 194143 transitions. [2022-12-14 12:01:47,479 INFO L78 Accepts]: Start accepts. Automaton has 119942 states and 194143 transitions. Word has length 177 [2022-12-14 12:01:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:01:47,480 INFO L495 AbstractCegarLoop]: Abstraction has 119942 states and 194143 transitions. [2022-12-14 12:01:47,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 12:01:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 119942 states and 194143 transitions. [2022-12-14 12:01:47,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 12:01:47,485 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:01:47,486 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:01:47,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 12:01:47,486 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:01:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:01:47,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1238730526, now seen corresponding path program 1 times [2022-12-14 12:01:47,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:01:47,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909628318] [2022-12-14 12:01:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:47,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:01:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-14 12:01:49,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:01:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909628318] [2022-12-14 12:01:49,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909628318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:01:49,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:01:49,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-12-14 12:01:49,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293571184] [2022-12-14 12:01:49,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:01:49,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 12:01:49,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:01:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 12:01:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:01:49,028 INFO L87 Difference]: Start difference. First operand 119942 states and 194143 transitions. Second operand has 23 states, 17 states have (on average 5.764705882352941) internal successors, (98), 19 states have internal predecessors, (98), 11 states have call successors, (29), 5 states have call predecessors, (29), 8 states have return successors, (28), 12 states have call predecessors, (28), 10 states have call successors, (28) [2022-12-14 12:02:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:10,218 INFO L93 Difference]: Finished difference Result 242693 states and 484306 transitions. [2022-12-14 12:02:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-14 12:02:10,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 5.764705882352941) internal successors, (98), 19 states have internal predecessors, (98), 11 states have call successors, (29), 5 states have call predecessors, (29), 8 states have return successors, (28), 12 states have call predecessors, (28), 10 states have call successors, (28) Word has length 182 [2022-12-14 12:02:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:11,391 INFO L225 Difference]: With dead ends: 242693 [2022-12-14 12:02:11,391 INFO L226 Difference]: Without dead ends: 220882 [2022-12-14 12:02:11,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=819, Invalid=4583, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 12:02:11,751 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 2168 mSDsluCounter, 5797 mSDsCounter, 0 mSdLazyCounter, 15189 mSolverCounterSat, 1064 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2281 SdHoareTripleChecker+Valid, 6354 SdHoareTripleChecker+Invalid, 16253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1064 IncrementalHoareTripleChecker+Valid, 15189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:11,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2281 Valid, 6354 Invalid, 16253 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1064 Valid, 15189 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-14 12:02:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220882 states. [2022-12-14 12:02:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220882 to 211912. [2022-12-14 12:02:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211912 states, 165868 states have (on average 1.5411712928352665) internal successors, (255631), 173171 states have internal predecessors, (255631), 32152 states have call successors, (32152), 10418 states have call predecessors, (32152), 13891 states have return successors, (63400), 29718 states have call predecessors, (63400), 32147 states have call successors, (63400) [2022-12-14 12:02:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211912 states to 211912 states and 351183 transitions. [2022-12-14 12:02:26,781 INFO L78 Accepts]: Start accepts. Automaton has 211912 states and 351183 transitions. Word has length 182 [2022-12-14 12:02:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:26,781 INFO L495 AbstractCegarLoop]: Abstraction has 211912 states and 351183 transitions. [2022-12-14 12:02:26,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 5.764705882352941) internal successors, (98), 19 states have internal predecessors, (98), 11 states have call successors, (29), 5 states have call predecessors, (29), 8 states have return successors, (28), 12 states have call predecessors, (28), 10 states have call successors, (28) [2022-12-14 12:02:26,781 INFO L276 IsEmpty]: Start isEmpty. Operand 211912 states and 351183 transitions. [2022-12-14 12:02:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 12:02:26,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:26,787 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:26,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 12:02:26,787 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:02:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:26,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1888678899, now seen corresponding path program 1 times [2022-12-14 12:02:26,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:26,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253501600] [2022-12-14 12:02:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:26,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 12:02:28,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:28,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253501600] [2022-12-14 12:02:28,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253501600] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:02:28,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970817131] [2022-12-14 12:02:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:28,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:28,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:02:28,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457ee5ae-7558-4ee1-a074-60d1469bbf84/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:02:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:28,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 2147 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 12:02:28,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:02:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 12:02:29,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:02:31,983 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 12:02:37,696 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 12:02:37,964 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 12:02:43,876 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 12:02:44,156 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 12:02:49,817 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 12:02:49,904 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 12:05:26,041 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions.