./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.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_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/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_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/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_2cd9d2ac-7059-465c-a92b-f753631b55c5/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 0e49baa02682605d5c6b8a86e9e1d38b2cd4076796b3122e76d3b43b5274a0df --- 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 11:53:17,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:53:17,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:53:17,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:53:17,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:53:17,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:53:17,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:53:17,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:53:17,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:53:17,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:53:17,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:53:17,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:53:17,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:53:17,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:53:17,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:53:17,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:53:17,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:53:17,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:53:17,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:53:17,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:53:17,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:53:17,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:53:17,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:53:17,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:53:17,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:53:17,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:53:17,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:53:17,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:53:17,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:53:17,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:53:17,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:53:17,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:53:17,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:53:17,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:53:17,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:53:17,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:53:17,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:53:17,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:53:17,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:53:17,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:53:17,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:53:17,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:53:17,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:53:17,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:53:17,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:53:17,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:53:17,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:53:17,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:53:17,333 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:53:17,333 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:53:17,333 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:53:17,333 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:53:17,334 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:53:17,334 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:53:17,334 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:53:17,334 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:53:17,334 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:53:17,335 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:53:17,335 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:53:17,335 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:53:17,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:53:17,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:53:17,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:53:17,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:53:17,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:53:17,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:53:17,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:53:17,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:53:17,337 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:53:17,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:53:17,338 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:53:17,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:53:17,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:53:17,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:53:17,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:53:17,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:53:17,339 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:53:17,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:53:17,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:53:17,339 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:53:17,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:53:17,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:53:17,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:53:17,340 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_2cd9d2ac-7059-465c-a92b-f753631b55c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e49baa02682605d5c6b8a86e9e1d38b2cd4076796b3122e76d3b43b5274a0df [2022-12-14 11:53:17,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:53:17,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:53:17,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:53:17,547 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:53:17,547 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:53:17,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c [2022-12-14 11:53:20,060 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:53:20,242 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:53:20,242 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c [2022-12-14 11:53:20,257 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/data/234fd9b3c/afede1fe9ac14ac585a6b579404fb5ef/FLAGb46665193 [2022-12-14 11:53:20,270 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/data/234fd9b3c/afede1fe9ac14ac585a6b579404fb5ef [2022-12-14 11:53:20,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:53:20,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:53:20,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:53:20,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:53:20,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:53:20,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1383b8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20, skipping insertion in model container [2022-12-14 11:53:20,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:53:20,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:53:20,464 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_2cd9d2ac-7059-465c-a92b-f753631b55c5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c[911,924] [2022-12-14 11:53:20,521 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_2cd9d2ac-7059-465c-a92b-f753631b55c5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c[8416,8429] [2022-12-14 11:53:20,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:53:20,633 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:53:20,643 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_2cd9d2ac-7059-465c-a92b-f753631b55c5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c[911,924] [2022-12-14 11:53:20,663 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_2cd9d2ac-7059-465c-a92b-f753631b55c5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c[8416,8429] [2022-12-14 11:53:20,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:53:20,735 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:53:20,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20 WrapperNode [2022-12-14 11:53:20,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:53:20,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:53:20,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:53:20,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:53:20,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,794 INFO L138 Inliner]: procedures = 81, calls = 101, calls flagged for inlining = 49, calls inlined = 49, statements flattened = 1141 [2022-12-14 11:53:20,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:53:20,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:53:20,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:53:20,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:53:20,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,827 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:53:20,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:53:20,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:53:20,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:53:20,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (1/1) ... [2022-12-14 11:53:20,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:53:20,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:53:20,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:53:20,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:53:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:53:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 11:53:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 11:53:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 11:53:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 11:53:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 11:53:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 11:53:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 11:53:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 11:53:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 11:53:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 11:53:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 11:53:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 11:53:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 11:53:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 11:53:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 11:53:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 11:53:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 11:53:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 11:53:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 11:53:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 11:53:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 11:53:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 11:53:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:53:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 11:53:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 11:53:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 11:53:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 11:53:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:53:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:53:20,896 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 11:53:20,896 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 11:53:20,896 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 11:53:20,896 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 11:53:21,007 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:53:21,008 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:53:21,616 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-12-14 11:53:21,617 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-12-14 11:53:21,670 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:53:21,994 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:53:21,994 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-12-14 11:53:21,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:53:21 BoogieIcfgContainer [2022-12-14 11:53:21,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:53:21,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:53:21,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:53:22,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:53:22,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:53:20" (1/3) ... [2022-12-14 11:53:22,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f92fe08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:53:22, skipping insertion in model container [2022-12-14 11:53:22,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:53:20" (2/3) ... [2022-12-14 11:53:22,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f92fe08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:53:22, skipping insertion in model container [2022-12-14 11:53:22,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:53:21" (3/3) ... [2022-12-14 11:53:22,004 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.13.cil-1.c [2022-12-14 11:53:22,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:53:22,019 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 11:53:22,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:53:22,082 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;@79ab10d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:53:22,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 11:53:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 284 states, 221 states have (on average 1.5520361990950227) internal successors, (343), 229 states have internal predecessors, (343), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2022-12-14 11:53:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 11:53:22,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:22,096 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 11:53:22,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1667242095, now seen corresponding path program 1 times [2022-12-14 11:53:22,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:22,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408504000] [2022-12-14 11:53:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:22,369 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 11:53:22,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:22,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408504000] [2022-12-14 11:53:22,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408504000] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:22,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:53:22,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:53:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614930681] [2022-12-14 11:53:22,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:22,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:53:22,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:22,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:53:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:53:22,403 INFO L87 Difference]: Start difference. First operand has 284 states, 221 states have (on average 1.5520361990950227) internal successors, (343), 229 states have internal predecessors, (343), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:53:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:22,871 INFO L93 Difference]: Finished difference Result 690 states and 1044 transitions. [2022-12-14 11:53:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:53:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-12-14 11:53:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:22,885 INFO L225 Difference]: With dead ends: 690 [2022-12-14 11:53:22,885 INFO L226 Difference]: Without dead ends: 407 [2022-12-14 11:53:22,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:53:22,892 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 483 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:22,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 746 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:53:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-12-14 11:53:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 396. [2022-12-14 11:53:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 302 states have (on average 1.466887417218543) internal successors, (443), 307 states have internal predecessors, (443), 65 states have call successors, (65), 29 states have call predecessors, (65), 27 states have return successors, (64), 61 states have call predecessors, (64), 61 states have call successors, (64) [2022-12-14 11:53:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 572 transitions. [2022-12-14 11:53:22,962 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 572 transitions. Word has length 44 [2022-12-14 11:53:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:22,963 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 572 transitions. [2022-12-14 11:53:22,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:53:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 572 transitions. [2022-12-14 11:53:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 11:53:22,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:22,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:22,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:53:22,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash -254554722, now seen corresponding path program 1 times [2022-12-14 11:53:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:22,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921132958] [2022-12-14 11:53:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:23,040 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 11:53:23,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:23,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921132958] [2022-12-14 11:53:23,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921132958] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:23,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:53:23,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:53:23,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322074369] [2022-12-14 11:53:23,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:23,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:53:23,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:23,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:53:23,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:23,044 INFO L87 Difference]: Start difference. First operand 396 states and 572 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:53:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:23,733 INFO L93 Difference]: Finished difference Result 933 states and 1295 transitions. [2022-12-14 11:53:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:53:23,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 11:53:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:23,737 INFO L225 Difference]: With dead ends: 933 [2022-12-14 11:53:23,737 INFO L226 Difference]: Without dead ends: 467 [2022-12-14 11:53:23,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:53:23,740 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1018 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:23,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 1259 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:53:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-12-14 11:53:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 382. [2022-12-14 11:53:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 288 states have (on average 1.4236111111111112) internal successors, (410), 293 states have internal predecessors, (410), 65 states have call successors, (65), 29 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-12-14 11:53:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 536 transitions. [2022-12-14 11:53:23,773 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 536 transitions. Word has length 45 [2022-12-14 11:53:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:23,774 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 536 transitions. [2022-12-14 11:53:23,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:53:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 536 transitions. [2022-12-14 11:53:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 11:53:23,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:23,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:23,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:53:23,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:23,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1770339692, now seen corresponding path program 1 times [2022-12-14 11:53:23,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:23,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167029611] [2022-12-14 11:53:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:23,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:23,863 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 11:53:23,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167029611] [2022-12-14 11:53:23,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167029611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:23,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:53:23,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:53:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930248729] [2022-12-14 11:53:23,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:23,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:53:23,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:53:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:23,865 INFO L87 Difference]: Start difference. First operand 382 states and 536 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:53:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:24,403 INFO L93 Difference]: Finished difference Result 848 states and 1144 transitions. [2022-12-14 11:53:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:53:24,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2022-12-14 11:53:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:24,406 INFO L225 Difference]: With dead ends: 848 [2022-12-14 11:53:24,406 INFO L226 Difference]: Without dead ends: 671 [2022-12-14 11:53:24,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:53:24,407 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 932 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:24,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 1202 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:53:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-12-14 11:53:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 646. [2022-12-14 11:53:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 469 states have (on average 1.3411513859275053) internal successors, (629), 474 states have internal predecessors, (629), 114 states have call successors, (114), 63 states have call predecessors, (114), 61 states have return successors, (127), 110 states have call predecessors, (127), 110 states have call successors, (127) [2022-12-14 11:53:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 870 transitions. [2022-12-14 11:53:24,438 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 870 transitions. Word has length 46 [2022-12-14 11:53:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:24,439 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 870 transitions. [2022-12-14 11:53:24,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:53:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 870 transitions. [2022-12-14 11:53:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:53:24,440 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:24,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:24,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:53:24,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:24,441 INFO L85 PathProgramCache]: Analyzing trace with hash 796245245, now seen corresponding path program 1 times [2022-12-14 11:53:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:24,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455411915] [2022-12-14 11:53:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:24,471 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 11:53:24,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:24,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455411915] [2022-12-14 11:53:24,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455411915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:24,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:53:24,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:53:24,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182850847] [2022-12-14 11:53:24,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:24,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:53:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:24,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:53:24,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:53:24,473 INFO L87 Difference]: Start difference. First operand 646 states and 870 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:24,558 INFO L93 Difference]: Finished difference Result 647 states and 871 transitions. [2022-12-14 11:53:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:53:24,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2022-12-14 11:53:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:24,563 INFO L225 Difference]: With dead ends: 647 [2022-12-14 11:53:24,563 INFO L226 Difference]: Without dead ends: 203 [2022-12-14 11:53:24,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:53:24,566 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 380 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:24,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 330 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:53:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-14 11:53:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-12-14 11:53:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 167 states have (on average 1.5389221556886228) internal successors, (257), 169 states have internal predecessors, (257), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-14 11:53:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 313 transitions. [2022-12-14 11:53:24,580 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 313 transitions. Word has length 50 [2022-12-14 11:53:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:24,581 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 313 transitions. [2022-12-14 11:53:24,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 313 transitions. [2022-12-14 11:53:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 11:53:24,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:24,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:24,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:53:24,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1445237416, now seen corresponding path program 1 times [2022-12-14 11:53:24,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:24,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811828628] [2022-12-14 11:53:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:24,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:24,730 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 11:53:24,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:24,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811828628] [2022-12-14 11:53:24,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811828628] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:24,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:53:24,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:53:24,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374402563] [2022-12-14 11:53:24,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:24,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:53:24,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:53:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:53:24,733 INFO L87 Difference]: Start difference. First operand 203 states and 313 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 11:53:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:25,465 INFO L93 Difference]: Finished difference Result 1146 states and 1885 transitions. [2022-12-14 11:53:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:53:25,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2022-12-14 11:53:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:25,470 INFO L225 Difference]: With dead ends: 1146 [2022-12-14 11:53:25,470 INFO L226 Difference]: Without dead ends: 949 [2022-12-14 11:53:25,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 11:53:25,472 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 1431 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:25,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1449 Valid, 1456 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:53:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-12-14 11:53:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 936. [2022-12-14 11:53:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 787 states have (on average 1.5362134688691234) internal successors, (1209), 792 states have internal predecessors, (1209), 118 states have call successors, (118), 31 states have call predecessors, (118), 30 states have return successors, (182), 113 states have call predecessors, (182), 116 states have call successors, (182) [2022-12-14 11:53:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1509 transitions. [2022-12-14 11:53:25,522 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1509 transitions. Word has length 71 [2022-12-14 11:53:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:25,523 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1509 transitions. [2022-12-14 11:53:25,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 11:53:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1509 transitions. [2022-12-14 11:53:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:53:25,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:25,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:25,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:53:25,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2107852620, now seen corresponding path program 1 times [2022-12-14 11:53:25,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:25,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591033817] [2022-12-14 11:53:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:25,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:53:25,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:25,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591033817] [2022-12-14 11:53:25,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591033817] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:53:25,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294636331] [2022-12-14 11:53:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:25,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:25,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:53:25,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:53:25,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:53:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:53:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:53:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:53:25,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:53:25,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294636331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:25,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:53:25,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:53:25,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604882524] [2022-12-14 11:53:25,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:25,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:53:25,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:25,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:53:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:25,966 INFO L87 Difference]: Start difference. First operand 936 states and 1509 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:26,163 INFO L93 Difference]: Finished difference Result 2780 states and 4618 transitions. [2022-12-14 11:53:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:53:26,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 11:53:26,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:26,171 INFO L225 Difference]: With dead ends: 2780 [2022-12-14 11:53:26,171 INFO L226 Difference]: Without dead ends: 1850 [2022-12-14 11:53:26,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:26,176 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 264 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:26,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 527 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:53:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2022-12-14 11:53:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1841. [2022-12-14 11:53:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1555 states have (on average 1.5331189710610933) internal successors, (2384), 1563 states have internal predecessors, (2384), 225 states have call successors, (225), 61 states have call predecessors, (225), 60 states have return successors, (351), 217 states have call predecessors, (351), 223 states have call successors, (351) [2022-12-14 11:53:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2960 transitions. [2022-12-14 11:53:26,262 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2960 transitions. Word has length 144 [2022-12-14 11:53:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:26,263 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2960 transitions. [2022-12-14 11:53:26,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2960 transitions. [2022-12-14 11:53:26,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:53:26,266 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:26,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:26,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:53:26,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:26,468 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2106058038, now seen corresponding path program 1 times [2022-12-14 11:53:26,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:26,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855214048] [2022-12-14 11:53:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:26,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:53:26,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:26,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855214048] [2022-12-14 11:53:26,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855214048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:53:26,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552301354] [2022-12-14 11:53:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:26,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:26,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:53:26,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:53:26,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:53:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:26,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:53:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:53:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 11:53:26,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:53:26,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552301354] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:26,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:53:26,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:53:26,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639482799] [2022-12-14 11:53:26,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:26,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:53:26,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:53:26,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:26,905 INFO L87 Difference]: Start difference. First operand 1841 states and 2960 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:27,185 INFO L93 Difference]: Finished difference Result 5480 states and 9072 transitions. [2022-12-14 11:53:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:53:27,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 11:53:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:27,198 INFO L225 Difference]: With dead ends: 5480 [2022-12-14 11:53:27,198 INFO L226 Difference]: Without dead ends: 3645 [2022-12-14 11:53:27,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:27,205 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 285 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:27,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 527 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:53:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2022-12-14 11:53:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3631. [2022-12-14 11:53:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3076 states have (on average 1.52925877763329) internal successors, (4704), 3090 states have internal predecessors, (4704), 434 states have call successors, (434), 121 states have call predecessors, (434), 120 states have return successors, (680), 420 states have call predecessors, (680), 432 states have call successors, (680) [2022-12-14 11:53:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 5818 transitions. [2022-12-14 11:53:27,393 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 5818 transitions. Word has length 144 [2022-12-14 11:53:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:27,393 INFO L495 AbstractCegarLoop]: Abstraction has 3631 states and 5818 transitions. [2022-12-14 11:53:27,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 5818 transitions. [2022-12-14 11:53:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:53:27,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:27,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:27,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:53:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:27,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash 121175540, now seen corresponding path program 1 times [2022-12-14 11:53:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:27,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141146553] [2022-12-14 11:53:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:53:27,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:27,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141146553] [2022-12-14 11:53:27,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141146553] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:53:27,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126512848] [2022-12-14 11:53:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:27,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:27,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:53:27,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:53:27,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:53:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:53:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:53:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:53:27,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:53:27,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126512848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:27,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:53:27,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:53:27,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542147316] [2022-12-14 11:53:27,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:27,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:53:27,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:27,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:53:27,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:27,939 INFO L87 Difference]: Start difference. First operand 3631 states and 5818 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:28,325 INFO L93 Difference]: Finished difference Result 10820 states and 17839 transitions. [2022-12-14 11:53:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:53:28,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 11:53:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:28,352 INFO L225 Difference]: With dead ends: 10820 [2022-12-14 11:53:28,353 INFO L226 Difference]: Without dead ends: 7195 [2022-12-14 11:53:28,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:28,363 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 255 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:28,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 527 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:53:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7195 states. [2022-12-14 11:53:28,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7195 to 7171. [2022-12-14 11:53:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7171 states, 6088 states have (on average 1.5249671484888305) internal successors, (9284), 6114 states have internal predecessors, (9284), 842 states have call successors, (842), 241 states have call predecessors, (842), 240 states have return successors, (1320), 816 states have call predecessors, (1320), 840 states have call successors, (1320) [2022-12-14 11:53:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7171 states to 7171 states and 11446 transitions. [2022-12-14 11:53:28,744 INFO L78 Accepts]: Start accepts. Automaton has 7171 states and 11446 transitions. Word has length 144 [2022-12-14 11:53:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:28,744 INFO L495 AbstractCegarLoop]: Abstraction has 7171 states and 11446 transitions. [2022-12-14 11:53:28,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7171 states and 11446 transitions. [2022-12-14 11:53:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:53:28,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:28,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:28,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:53:28,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 11:53:28,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:28,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1234479310, now seen corresponding path program 1 times [2022-12-14 11:53:28,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:28,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325546486] [2022-12-14 11:53:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:28,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:53:29,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325546486] [2022-12-14 11:53:29,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325546486] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:53:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424627807] [2022-12-14 11:53:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:29,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:29,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:53:29,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:53:29,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:53:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:29,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:53:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:53:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 11:53:29,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:53:29,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424627807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:29,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:53:29,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:53:29,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275158784] [2022-12-14 11:53:29,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:29,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:53:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:29,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:53:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:29,347 INFO L87 Difference]: Start difference. First operand 7171 states and 11446 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:30,059 INFO L93 Difference]: Finished difference Result 21380 states and 35091 transitions. [2022-12-14 11:53:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:53:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 11:53:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:30,112 INFO L225 Difference]: With dead ends: 21380 [2022-12-14 11:53:30,113 INFO L226 Difference]: Without dead ends: 14215 [2022-12-14 11:53:30,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:30,136 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 282 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:30,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 527 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:53:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14215 states. [2022-12-14 11:53:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14215 to 14171. [2022-12-14 11:53:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14171 states, 12052 states have (on average 1.5204115499502158) internal successors, (18324), 12102 states have internal predecessors, (18324), 1638 states have call successors, (1638), 481 states have call predecessors, (1638), 480 states have return successors, (2564), 1588 states have call predecessors, (2564), 1636 states have call successors, (2564) [2022-12-14 11:53:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14171 states to 14171 states and 22526 transitions. [2022-12-14 11:53:30,852 INFO L78 Accepts]: Start accepts. Automaton has 14171 states and 22526 transitions. Word has length 144 [2022-12-14 11:53:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:30,852 INFO L495 AbstractCegarLoop]: Abstraction has 14171 states and 22526 transitions. [2022-12-14 11:53:30,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 14171 states and 22526 transitions. [2022-12-14 11:53:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:53:30,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:30,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:30,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:53:31,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 11:53:31,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash 371795764, now seen corresponding path program 1 times [2022-12-14 11:53:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:31,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47337673] [2022-12-14 11:53:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:53:31,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:31,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47337673] [2022-12-14 11:53:31,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47337673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:53:31,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066648395] [2022-12-14 11:53:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:31,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:31,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:53:31,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:53:31,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:53:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:31,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:53:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:53:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 11:53:31,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:53:31,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066648395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:31,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:53:31,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:53:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614201252] [2022-12-14 11:53:31,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:31,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:53:31,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:31,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:53:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:31,450 INFO L87 Difference]: Start difference. First operand 14171 states and 22526 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:32,553 INFO L93 Difference]: Finished difference Result 42260 states and 69031 transitions. [2022-12-14 11:53:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:53:32,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 11:53:32,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:32,632 INFO L225 Difference]: With dead ends: 42260 [2022-12-14 11:53:32,632 INFO L226 Difference]: Without dead ends: 28095 [2022-12-14 11:53:32,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:32,671 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 270 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:32,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 527 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:53:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28095 states. [2022-12-14 11:53:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28095 to 28011. [2022-12-14 11:53:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28011 states, 23860 states have (on average 1.515674769488684) internal successors, (36164), 23958 states have internal predecessors, (36164), 3190 states have call successors, (3190), 961 states have call predecessors, (3190), 960 states have return successors, (4980), 3092 states have call predecessors, (4980), 3188 states have call successors, (4980) [2022-12-14 11:53:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28011 states to 28011 states and 44334 transitions. [2022-12-14 11:53:34,087 INFO L78 Accepts]: Start accepts. Automaton has 28011 states and 44334 transitions. Word has length 144 [2022-12-14 11:53:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:34,088 INFO L495 AbstractCegarLoop]: Abstraction has 28011 states and 44334 transitions. [2022-12-14 11:53:34,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:34,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28011 states and 44334 transitions. [2022-12-14 11:53:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:53:34,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:34,109 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:34,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:53:34,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:34,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash 875391542, now seen corresponding path program 1 times [2022-12-14 11:53:34,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:34,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047186837] [2022-12-14 11:53:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:34,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:53:34,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:34,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047186837] [2022-12-14 11:53:34,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047186837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:53:34,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404648941] [2022-12-14 11:53:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:34,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:53:34,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:53:34,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:53:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:34,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:53:34,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:53:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 11:53:34,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:53:34,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404648941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:34,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:53:34,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:53:34,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983180280] [2022-12-14 11:53:34,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:34,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:53:34,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:53:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:34,601 INFO L87 Difference]: Start difference. First operand 28011 states and 44334 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:36,899 INFO L93 Difference]: Finished difference Result 83540 states and 135783 transitions. [2022-12-14 11:53:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:53:36,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 11:53:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:37,076 INFO L225 Difference]: With dead ends: 83540 [2022-12-14 11:53:37,076 INFO L226 Difference]: Without dead ends: 55535 [2022-12-14 11:53:37,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:37,154 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 276 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:37,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 527 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:53:37,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55535 states. [2022-12-14 11:53:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55535 to 55371. [2022-12-14 11:53:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55371 states, 47236 states have (on average 1.510796849860276) internal successors, (71364), 47430 states have internal predecessors, (71364), 6214 states have call successors, (6214), 1921 states have call predecessors, (6214), 1920 states have return successors, (9668), 6020 states have call predecessors, (9668), 6212 states have call successors, (9668) [2022-12-14 11:53:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55371 states to 55371 states and 87246 transitions. [2022-12-14 11:53:39,475 INFO L78 Accepts]: Start accepts. Automaton has 55371 states and 87246 transitions. Word has length 144 [2022-12-14 11:53:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:39,475 INFO L495 AbstractCegarLoop]: Abstraction has 55371 states and 87246 transitions. [2022-12-14 11:53:39,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 55371 states and 87246 transitions. [2022-12-14 11:53:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:53:39,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:39,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:39,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:53:39,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:39,722 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1786766264, now seen corresponding path program 1 times [2022-12-14 11:53:39,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:39,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334865625] [2022-12-14 11:53:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:39,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:53:39,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:39,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334865625] [2022-12-14 11:53:39,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334865625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:53:39,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115815111] [2022-12-14 11:53:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:39,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:53:39,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:53:39,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:53:39,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:53:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:53:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:53:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:53:40,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:53:40,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115815111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:40,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:53:40,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:53:40,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708872552] [2022-12-14 11:53:40,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:40,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:53:40,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:53:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:40,076 INFO L87 Difference]: Start difference. First operand 55371 states and 87246 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:44,456 INFO L93 Difference]: Finished difference Result 165140 states and 267031 transitions. [2022-12-14 11:53:44,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:53:44,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 11:53:44,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:44,822 INFO L225 Difference]: With dead ends: 165140 [2022-12-14 11:53:44,823 INFO L226 Difference]: Without dead ends: 109775 [2022-12-14 11:53:44,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:44,969 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 261 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:44,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 527 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:53:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109775 states. [2022-12-14 11:53:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109775 to 109451. [2022-12-14 11:53:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109451 states, 93508 states have (on average 1.505796295504128) internal successors, (140804), 93894 states have internal predecessors, (140804), 12102 states have call successors, (12102), 3841 states have call predecessors, (12102), 3840 states have return successors, (18756), 11716 states have call predecessors, (18756), 12100 states have call successors, (18756) [2022-12-14 11:53:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109451 states to 109451 states and 171662 transitions. [2022-12-14 11:53:50,400 INFO L78 Accepts]: Start accepts. Automaton has 109451 states and 171662 transitions. Word has length 144 [2022-12-14 11:53:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:50,400 INFO L495 AbstractCegarLoop]: Abstraction has 109451 states and 171662 transitions. [2022-12-14 11:53:50,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:53:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 109451 states and 171662 transitions. [2022-12-14 11:53:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:53:50,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:50,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:50,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:53:50,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9d2ac-7059-465c-a92b-f753631b55c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 11:53:50,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:53:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1183700598, now seen corresponding path program 1 times [2022-12-14 11:53:50,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:53:50,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030985419] [2022-12-14 11:53:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:50,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:53:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 11:53:51,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:53:51,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030985419] [2022-12-14 11:53:51,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030985419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:53:51,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:53:51,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:53:51,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717278930] [2022-12-14 11:53:51,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:53:51,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:53:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:53:51,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:53:51,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:53:51,065 INFO L87 Difference]: Start difference. First operand 109451 states and 171662 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:53:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:59,874 INFO L93 Difference]: Finished difference Result 307347 states and 485460 transitions. [2022-12-14 11:53:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:53:59,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-12-14 11:53:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:54:00,605 INFO L225 Difference]: With dead ends: 307347 [2022-12-14 11:54:00,605 INFO L226 Difference]: Without dead ends: 197903 [2022-12-14 11:54:00,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:54:00,871 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 1012 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:54:00,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1019 Valid, 1127 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:54:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197903 states. [2022-12-14 11:54:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197903 to 173579. [2022-12-14 11:54:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173579 states, 148228 states have (on average 1.49998650727258) internal successors, (222340), 148870 states have internal predecessors, (222340), 19206 states have call successors, (19206), 6145 states have call predecessors, (19206), 6144 states have return successors, (30660), 18564 states have call predecessors, (30660), 19204 states have call successors, (30660) [2022-12-14 11:54:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173579 states to 173579 states and 272206 transitions. [2022-12-14 11:54:09,795 INFO L78 Accepts]: Start accepts. Automaton has 173579 states and 272206 transitions. Word has length 144 [2022-12-14 11:54:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:54:09,795 INFO L495 AbstractCegarLoop]: Abstraction has 173579 states and 272206 transitions. [2022-12-14 11:54:09,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:54:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 173579 states and 272206 transitions. [2022-12-14 11:54:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 11:54:09,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:09,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:54:09,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 11:54:09,905 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:54:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1985002546, now seen corresponding path program 1 times [2022-12-14 11:54:09,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:54:09,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367680297] [2022-12-14 11:54:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:09,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:54:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 11:54:10,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:54:10,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367680297] [2022-12-14 11:54:10,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367680297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:54:10,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:54:10,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:54:10,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346429817] [2022-12-14 11:54:10,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:54:10,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:54:10,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:54:10,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:54:10,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:54:10,207 INFO L87 Difference]: Start difference. First operand 173579 states and 272206 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:54:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:54:24,771 INFO L93 Difference]: Finished difference Result 469267 states and 741972 transitions. [2022-12-14 11:54:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:54:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 145 [2022-12-14 11:54:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:54:25,740 INFO L225 Difference]: With dead ends: 469267 [2022-12-14 11:54:25,740 INFO L226 Difference]: Without dead ends: 295695 [2022-12-14 11:54:26,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:54:26,092 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 996 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:54:26,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 1008 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:54:26,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295695 states. [2022-12-14 11:54:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295695 to 258315. [2022-12-14 11:54:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258315 states, 220548 states have (on average 1.495928323992963) internal successors, (329924), 221510 states have internal predecessors, (329924), 28550 states have call successors, (28550), 9217 states have call predecessors, (28550), 9216 states have return successors, (45508), 27588 states have call predecessors, (45508), 28548 states have call successors, (45508) [2022-12-14 11:54:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258315 states to 258315 states and 403982 transitions. [2022-12-14 11:54:40,957 INFO L78 Accepts]: Start accepts. Automaton has 258315 states and 403982 transitions. Word has length 145 [2022-12-14 11:54:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:54:40,958 INFO L495 AbstractCegarLoop]: Abstraction has 258315 states and 403982 transitions. [2022-12-14 11:54:40,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:54:40,958 INFO L276 IsEmpty]: Start isEmpty. Operand 258315 states and 403982 transitions. [2022-12-14 11:54:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 11:54:41,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:41,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:54:41,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 11:54:41,106 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:54:41,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:41,107 INFO L85 PathProgramCache]: Analyzing trace with hash -712722190, now seen corresponding path program 1 times [2022-12-14 11:54:41,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:54:41,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044174743] [2022-12-14 11:54:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:41,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:54:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 11:54:41,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:54:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044174743] [2022-12-14 11:54:41,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044174743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:54:41,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:54:41,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:54:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070983401] [2022-12-14 11:54:41,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:54:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:54:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:54:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:54:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:54:41,659 INFO L87 Difference]: Start difference. First operand 258315 states and 403982 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:55:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:15,099 INFO L93 Difference]: Finished difference Result 865555 states and 1369173 transitions. [2022-12-14 11:55:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:55:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 146 [2022-12-14 11:55:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:17,483 INFO L225 Difference]: With dead ends: 865555 [2022-12-14 11:55:17,483 INFO L226 Difference]: Without dead ends: 607247 [2022-12-14 11:55:18,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:55:18,181 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 1118 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:18,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 731 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:55:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607247 states. [2022-12-14 11:55:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607247 to 507403. [2022-12-14 11:55:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507403 states, 433412 states have (on average 1.4905447934067353) internal successors, (646020), 435334 states have internal predecessors, (646020), 55558 states have call successors, (55558), 18433 states have call predecessors, (55558), 18432 states have return successors, (88132), 53636 states have call predecessors, (88132), 55556 states have call successors, (88132) [2022-12-14 11:55:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507403 states to 507403 states and 789710 transitions. [2022-12-14 11:55:51,782 INFO L78 Accepts]: Start accepts. Automaton has 507403 states and 789710 transitions. Word has length 146 [2022-12-14 11:55:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:51,782 INFO L495 AbstractCegarLoop]: Abstraction has 507403 states and 789710 transitions. [2022-12-14 11:55:51,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:55:51,782 INFO L276 IsEmpty]: Start isEmpty. Operand 507403 states and 789710 transitions. [2022-12-14 11:55:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 11:55:52,209 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:52,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:52,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 11:55:52,209 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:55:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:52,210 INFO L85 PathProgramCache]: Analyzing trace with hash 953518646, now seen corresponding path program 1 times [2022-12-14 11:55:52,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:55:52,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047848772] [2022-12-14 11:55:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:52,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:55:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 11:55:52,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:55:52,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047848772] [2022-12-14 11:55:52,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047848772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:55:52,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:55:52,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:55:52,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883181276] [2022-12-14 11:55:52,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:55:52,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:55:52,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:55:52,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:55:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:55:52,495 INFO L87 Difference]: Start difference. First operand 507403 states and 789710 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:56:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:56:47,194 INFO L93 Difference]: Finished difference Result 1351443 states and 2124500 transitions. [2022-12-14 11:56:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:56:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 147 [2022-12-14 11:56:47,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:56:51,302 INFO L225 Difference]: With dead ends: 1351443 [2022-12-14 11:56:51,302 INFO L226 Difference]: Without dead ends: 844047 [2022-12-14 11:56:52,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:56:52,846 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 1004 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:56:52,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 799 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:56:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844047 states. [2022-12-14 11:57:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844047 to 754955. [2022-12-14 11:57:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754955 states, 644740 states have (on average 1.4862983528243943) internal successors, (958276), 647622 states have internal predecessors, (958276), 82566 states have call successors, (82566), 27649 states have call predecessors, (82566), 27648 states have return successors, (130756), 79684 states have call predecessors, (130756), 82564 states have call successors, (130756) [2022-12-14 11:57:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754955 states to 754955 states and 1171598 transitions. [2022-12-14 11:57:47,473 INFO L78 Accepts]: Start accepts. Automaton has 754955 states and 1171598 transitions. Word has length 147 [2022-12-14 11:57:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:57:47,473 INFO L495 AbstractCegarLoop]: Abstraction has 754955 states and 1171598 transitions. [2022-12-14 11:57:47,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:57:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 754955 states and 1171598 transitions. [2022-12-14 11:57:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 11:57:47,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:57:47,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:57:47,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 11:57:47,965 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:57:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:57:47,966 INFO L85 PathProgramCache]: Analyzing trace with hash -891757842, now seen corresponding path program 1 times [2022-12-14 11:57:47,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:57:47,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687404060] [2022-12-14 11:57:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:57:47,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:57:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:57:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 11:57:48,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:57:48,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687404060] [2022-12-14 11:57:48,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687404060] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:57:48,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:57:48,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:57:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027106000] [2022-12-14 11:57:48,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:57:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:57:48,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:57:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:57:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:57:48,367 INFO L87 Difference]: Start difference. First operand 754955 states and 1171598 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:59:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:52,544 INFO L93 Difference]: Finished difference Result 2467603 states and 3883989 transitions. [2022-12-14 11:59:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:59:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 148 [2022-12-14 11:59:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted.