./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/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_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label47.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/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_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/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 c56a954c6b6423eb9dc896d65464ae85499e68477be4edbb5172c2d6eb981204 --- 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 11:15:42,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:15:42,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:15:42,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:15:42,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:15:42,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:15:42,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:15:42,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:15:42,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:15:42,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:15:42,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:15:42,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:15:42,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:15:42,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:15:42,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:15:42,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:15:42,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:15:42,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:15:42,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:15:42,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:15:42,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:15:42,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:15:42,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:15:42,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:15:42,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:15:42,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:15:42,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:15:42,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:15:42,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:15:42,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:15:42,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:15:42,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:15:42,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:15:42,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:15:42,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:15:42,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:15:42,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:15:42,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:15:42,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:15:42,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:15:42,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:15:42,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:15:42,368 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:15:42,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:15:42,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:15:42,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:15:42,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:15:42,370 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:15:42,370 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:15:42,370 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:15:42,371 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:15:42,371 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:15:42,371 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:15:42,371 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:15:42,371 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:15:42,372 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:15:42,372 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:15:42,372 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:15:42,372 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:15:42,372 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:15:42,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:15:42,373 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:15:42,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:15:42,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:15:42,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:15:42,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:15:42,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:15:42,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:15:42,375 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:15:42,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:15:42,375 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:15:42,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:15:42,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:15:42,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:15:42,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:15:42,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:15:42,376 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:15:42,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:15:42,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:15:42,377 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:15:42,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:15:42,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:15:42,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:15:42,377 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_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c56a954c6b6423eb9dc896d65464ae85499e68477be4edbb5172c2d6eb981204 [2022-12-14 11:15:42,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:15:42,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:15:42,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:15:42,592 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:15:42,592 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:15:42,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label47.c [2022-12-14 11:15:45,147 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:15:45,387 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:15:45,387 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/sv-benchmarks/c/eca-rers2012/Problem03_label47.c [2022-12-14 11:15:45,397 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/data/d601874a7/32bcd43c2b9f436ea114c9b17dee6296/FLAG1dccb0abd [2022-12-14 11:15:45,408 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/data/d601874a7/32bcd43c2b9f436ea114c9b17dee6296 [2022-12-14 11:15:45,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:15:45,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:15:45,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:15:45,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:15:45,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:15:45,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:15:45" (1/1) ... [2022-12-14 11:15:45,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42863c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:45, skipping insertion in model container [2022-12-14 11:15:45,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:15:45" (1/1) ... [2022-12-14 11:15:45,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:15:45,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:15:45,925 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_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/sv-benchmarks/c/eca-rers2012/Problem03_label47.c[60825,60838] [2022-12-14 11:15:45,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:15:45,968 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:15:46,145 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_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/sv-benchmarks/c/eca-rers2012/Problem03_label47.c[60825,60838] [2022-12-14 11:15:46,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:15:46,161 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:15:46,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46 WrapperNode [2022-12-14 11:15:46,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:15:46,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:15:46,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:15:46,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:15:46,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,245 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 11:15:46,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:15:46,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:15:46,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:15:46,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:15:46,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,297 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:15:46,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:15:46,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:15:46,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:15:46,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (1/1) ... [2022-12-14 11:15:46,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:15:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:46,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:15:46,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:15:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:15:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:15:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:15:46,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:15:46,438 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:15:46,440 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:15:47,742 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:15:47,958 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:15:47,958 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:15:47,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:15:47 BoogieIcfgContainer [2022-12-14 11:15:47,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:15:47,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:15:47,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:15:47,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:15:47,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:15:45" (1/3) ... [2022-12-14 11:15:47,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2391d805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:15:47, skipping insertion in model container [2022-12-14 11:15:47,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:46" (2/3) ... [2022-12-14 11:15:47,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2391d805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:15:47, skipping insertion in model container [2022-12-14 11:15:47,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:15:47" (3/3) ... [2022-12-14 11:15:47,967 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label47.c [2022-12-14 11:15:47,980 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:15:47,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:15:48,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:15:48,022 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;@37ffc9a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:15:48,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:15:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 11:15:48,039 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:48,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:48,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:48,044 INFO L85 PathProgramCache]: Analyzing trace with hash 209353466, now seen corresponding path program 1 times [2022-12-14 11:15:48,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:48,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357808476] [2022-12-14 11:15:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:48,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:48,527 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 11:15:48,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:48,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357808476] [2022-12-14 11:15:48,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357808476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:48,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:48,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:15:48,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923451991] [2022-12-14 11:15:48,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:48,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:48,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:48,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:15:48,565 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:49,274 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 11:15:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 11:15:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:49,286 INFO L225 Difference]: With dead ends: 440 [2022-12-14 11:15:49,286 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 11:15:49,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:15:49,291 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:49,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 51 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:15:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 11:15:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 11:15:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8090277777777777) internal successors, (521), 288 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 521 transitions. [2022-12-14 11:15:49,341 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 521 transitions. Word has length 143 [2022-12-14 11:15:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:49,342 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 521 transitions. [2022-12-14 11:15:49,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 521 transitions. [2022-12-14 11:15:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 11:15:49,347 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:49,347 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:49,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:15:49,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:49,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1094393753, now seen corresponding path program 1 times [2022-12-14 11:15:49,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:49,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053345008] [2022-12-14 11:15:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:49,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:49,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:49,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053345008] [2022-12-14 11:15:49,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053345008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:49,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:49,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:15:49,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527094082] [2022-12-14 11:15:49,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:49,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:49,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:49,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:49,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:15:49,570 INFO L87 Difference]: Start difference. First operand 289 states and 521 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:50,162 INFO L93 Difference]: Finished difference Result 863 states and 1560 transitions. [2022-12-14 11:15:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:50,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 11:15:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:50,167 INFO L225 Difference]: With dead ends: 863 [2022-12-14 11:15:50,168 INFO L226 Difference]: Without dead ends: 575 [2022-12-14 11:15:50,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:15:50,169 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:50,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 22 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:15:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-12-14 11:15:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-12-14 11:15:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7682926829268293) internal successors, (1015), 574 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1015 transitions. [2022-12-14 11:15:50,186 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1015 transitions. Word has length 151 [2022-12-14 11:15:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:50,186 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1015 transitions. [2022-12-14 11:15:50,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1015 transitions. [2022-12-14 11:15:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 11:15:50,189 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:50,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:50,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:15:50,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash 631565850, now seen corresponding path program 1 times [2022-12-14 11:15:50,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:50,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933578821] [2022-12-14 11:15:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:50,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:50,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933578821] [2022-12-14 11:15:50,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933578821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:50,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:50,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:15:50,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671614126] [2022-12-14 11:15:50,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:50,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:50,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:50,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:15:50,323 INFO L87 Difference]: Start difference. First operand 575 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:50,907 INFO L93 Difference]: Finished difference Result 1723 states and 3043 transitions. [2022-12-14 11:15:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:50,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-12-14 11:15:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:50,913 INFO L225 Difference]: With dead ends: 1723 [2022-12-14 11:15:50,913 INFO L226 Difference]: Without dead ends: 1149 [2022-12-14 11:15:50,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:15:50,915 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 171 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:50,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 43 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:15:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-12-14 11:15:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2022-12-14 11:15:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6413612565445026) internal successors, (1881), 1146 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1881 transitions. [2022-12-14 11:15:50,937 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1881 transitions. Word has length 152 [2022-12-14 11:15:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:50,937 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1881 transitions. [2022-12-14 11:15:50,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1881 transitions. [2022-12-14 11:15:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 11:15:50,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:50,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:50,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:15:50,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:50,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:50,942 INFO L85 PathProgramCache]: Analyzing trace with hash 14521620, now seen corresponding path program 1 times [2022-12-14 11:15:50,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:50,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764607225] [2022-12-14 11:15:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:50,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:51,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764607225] [2022-12-14 11:15:51,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764607225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:51,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:51,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:15:51,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792493403] [2022-12-14 11:15:51,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:51,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:15:51,171 INFO L87 Difference]: Start difference. First operand 1147 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:51,827 INFO L93 Difference]: Finished difference Result 2865 states and 4676 transitions. [2022-12-14 11:15:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:51,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-12-14 11:15:51,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:51,833 INFO L225 Difference]: With dead ends: 2865 [2022-12-14 11:15:51,833 INFO L226 Difference]: Without dead ends: 1719 [2022-12-14 11:15:51,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:15:51,836 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:51,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 33 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:15:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-12-14 11:15:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-12-14 11:15:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5948777648428405) internal successors, (2740), 1718 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2740 transitions. [2022-12-14 11:15:51,906 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2740 transitions. Word has length 153 [2022-12-14 11:15:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:51,907 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2740 transitions. [2022-12-14 11:15:51,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2740 transitions. [2022-12-14 11:15:51,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 11:15:51,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:51,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:51,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:15:51,913 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash -316844770, now seen corresponding path program 1 times [2022-12-14 11:15:51,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:51,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564604812] [2022-12-14 11:15:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:51,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:15:52,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:52,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564604812] [2022-12-14 11:15:52,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564604812] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:52,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:52,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:15:52,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247689701] [2022-12-14 11:15:52,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:52,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:15:52,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:15:52,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:52,378 INFO L87 Difference]: Start difference. First operand 1719 states and 2740 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:53,082 INFO L93 Difference]: Finished difference Result 3719 states and 5984 transitions. [2022-12-14 11:15:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:15:53,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-12-14 11:15:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:53,088 INFO L225 Difference]: With dead ends: 3719 [2022-12-14 11:15:53,089 INFO L226 Difference]: Without dead ends: 1719 [2022-12-14 11:15:53,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:53,092 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 219 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:53,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 11 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:15:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-12-14 11:15:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-12-14 11:15:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.4412107101280558) internal successors, (2476), 1718 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2476 transitions. [2022-12-14 11:15:53,133 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2476 transitions. Word has length 158 [2022-12-14 11:15:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:53,134 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2476 transitions. [2022-12-14 11:15:53,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2476 transitions. [2022-12-14 11:15:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 11:15:53,138 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:53,139 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:53,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:15:53,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1023966553, now seen corresponding path program 1 times [2022-12-14 11:15:53,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:53,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176724303] [2022-12-14 11:15:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:53,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:15:53,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:53,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176724303] [2022-12-14 11:15:53,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176724303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:53,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:53,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:15:53,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32316508] [2022-12-14 11:15:53,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:53,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:53,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:53,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:53,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:15:53,381 INFO L87 Difference]: Start difference. First operand 1719 states and 2476 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:53,867 INFO L93 Difference]: Finished difference Result 5153 states and 7425 transitions. [2022-12-14 11:15:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:53,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-12-14 11:15:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:53,886 INFO L225 Difference]: With dead ends: 5153 [2022-12-14 11:15:53,886 INFO L226 Difference]: Without dead ends: 3435 [2022-12-14 11:15:53,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:15:53,890 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 142 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:53,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 76 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:15:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-12-14 11:15:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-12-14 11:15:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.2813046010483402) internal successors, (4400), 3434 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4400 transitions. [2022-12-14 11:15:54,002 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4400 transitions. Word has length 160 [2022-12-14 11:15:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:54,002 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4400 transitions. [2022-12-14 11:15:54,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:54,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4400 transitions. [2022-12-14 11:15:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 11:15:54,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:54,010 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:54,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:15:54,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:54,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:54,011 INFO L85 PathProgramCache]: Analyzing trace with hash 10695331, now seen corresponding path program 1 times [2022-12-14 11:15:54,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:54,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783996805] [2022-12-14 11:15:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:54,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:54,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783996805] [2022-12-14 11:15:54,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783996805] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:54,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:54,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:15:54,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377179400] [2022-12-14 11:15:54,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:54,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:15:54,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:54,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:15:54,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:54,444 INFO L87 Difference]: Start difference. First operand 3435 states and 4400 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:55,240 INFO L93 Difference]: Finished difference Result 7868 states and 10135 transitions. [2022-12-14 11:15:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:15:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-12-14 11:15:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:55,247 INFO L225 Difference]: With dead ends: 7868 [2022-12-14 11:15:55,247 INFO L226 Difference]: Without dead ends: 4293 [2022-12-14 11:15:55,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:15:55,250 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 122 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:55,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 62 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:15:55,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2022-12-14 11:15:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4293. [2022-12-14 11:15:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.283550792171482) internal successors, (5509), 4292 states have internal predecessors, (5509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 5509 transitions. [2022-12-14 11:15:55,301 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 5509 transitions. Word has length 174 [2022-12-14 11:15:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:55,301 INFO L495 AbstractCegarLoop]: Abstraction has 4293 states and 5509 transitions. [2022-12-14 11:15:55,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 5509 transitions. [2022-12-14 11:15:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 11:15:55,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:55,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:55,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:15:55,306 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:55,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1441044350, now seen corresponding path program 1 times [2022-12-14 11:15:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:55,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920024084] [2022-12-14 11:15:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:55,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:55,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:55,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920024084] [2022-12-14 11:15:55,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920024084] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:55,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120781412] [2022-12-14 11:15:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:55,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:55,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:55,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:15:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:55,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:15:55,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 11:15:55,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:55,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120781412] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:55,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:55,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 11:15:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961453245] [2022-12-14 11:15:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:55,838 INFO L87 Difference]: Start difference. First operand 4293 states and 5509 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:56,330 INFO L93 Difference]: Finished difference Result 9157 states and 11863 transitions. [2022-12-14 11:15:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-12-14 11:15:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:56,338 INFO L225 Difference]: With dead ends: 9157 [2022-12-14 11:15:56,338 INFO L226 Difference]: Without dead ends: 4865 [2022-12-14 11:15:56,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:56,342 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:56,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 200 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:15:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2022-12-14 11:15:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 4865. [2022-12-14 11:15:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 1.2939967105263157) internal successors, (6294), 4864 states have internal predecessors, (6294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 6294 transitions. [2022-12-14 11:15:56,427 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 6294 transitions. Word has length 181 [2022-12-14 11:15:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:56,428 INFO L495 AbstractCegarLoop]: Abstraction has 4865 states and 6294 transitions. [2022-12-14 11:15:56,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 6294 transitions. [2022-12-14 11:15:56,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-12-14 11:15:56,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:56,436 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:56,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:15:56,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:56,637 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1153484894, now seen corresponding path program 1 times [2022-12-14 11:15:56,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:56,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896930728] [2022-12-14 11:15:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:56,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:15:56,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:56,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896930728] [2022-12-14 11:15:56,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896930728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:56,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062849652] [2022-12-14 11:15:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:56,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:56,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:56,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:56,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:15:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:15:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:15:57,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:57,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062849652] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:57,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:57,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 11:15:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404389219] [2022-12-14 11:15:57,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:57,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:57,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:57,251 INFO L87 Difference]: Start difference. First operand 4865 states and 6294 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:57,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:57,759 INFO L93 Difference]: Finished difference Result 12589 states and 16663 transitions. [2022-12-14 11:15:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:57,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2022-12-14 11:15:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:57,773 INFO L225 Difference]: With dead ends: 12589 [2022-12-14 11:15:57,773 INFO L226 Difference]: Without dead ends: 7725 [2022-12-14 11:15:57,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:57,776 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:57,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 223 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:15:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7725 states. [2022-12-14 11:15:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7725 to 7439. [2022-12-14 11:15:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 1.2264049475665502) internal successors, (9122), 7438 states have internal predecessors, (9122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 9122 transitions. [2022-12-14 11:15:57,897 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 9122 transitions. Word has length 187 [2022-12-14 11:15:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:57,897 INFO L495 AbstractCegarLoop]: Abstraction has 7439 states and 9122 transitions. [2022-12-14 11:15:57,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 9122 transitions. [2022-12-14 11:15:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-12-14 11:15:57,906 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:57,907 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:57,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:15:58,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:58,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1315645915, now seen corresponding path program 1 times [2022-12-14 11:15:58,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:58,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89081704] [2022-12-14 11:15:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:58,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:58,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89081704] [2022-12-14 11:15:58,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89081704] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:58,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:58,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:15:58,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786798458] [2022-12-14 11:15:58,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:58,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:58,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:58,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:15:58,437 INFO L87 Difference]: Start difference. First operand 7439 states and 9122 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:58,916 INFO L93 Difference]: Finished difference Result 16021 states and 19549 transitions. [2022-12-14 11:15:58,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:58,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-12-14 11:15:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:58,931 INFO L225 Difference]: With dead ends: 16021 [2022-12-14 11:15:58,931 INFO L226 Difference]: Without dead ends: 8583 [2022-12-14 11:15:58,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:15:58,937 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 89 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:58,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 52 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:15:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2022-12-14 11:15:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 8583. [2022-12-14 11:15:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 1.2130039617804707) internal successors, (10410), 8582 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 10410 transitions. [2022-12-14 11:15:59,043 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 10410 transitions. Word has length 206 [2022-12-14 11:15:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:59,044 INFO L495 AbstractCegarLoop]: Abstraction has 8583 states and 10410 transitions. [2022-12-14 11:15:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 10410 transitions. [2022-12-14 11:15:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-12-14 11:15:59,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:59,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:59,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 11:15:59,050 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1345057024, now seen corresponding path program 1 times [2022-12-14 11:15:59,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:59,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503475232] [2022-12-14 11:15:59,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:59,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:59,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:59,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503475232] [2022-12-14 11:15:59,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503475232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320614782] [2022-12-14 11:15:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:59,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:59,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:59,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:59,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:15:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:15:59,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:59,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:59,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320614782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:59,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:59,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 11:15:59,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545768063] [2022-12-14 11:15:59,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:59,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:59,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:59,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:59,654 INFO L87 Difference]: Start difference. First operand 8583 states and 10410 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:00,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:00,221 INFO L93 Difference]: Finished difference Result 22885 states and 27692 transitions. [2022-12-14 11:16:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:16:00,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2022-12-14 11:16:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:00,245 INFO L225 Difference]: With dead ends: 22885 [2022-12-14 11:16:00,245 INFO L226 Difference]: Without dead ends: 14303 [2022-12-14 11:16:00,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:16:00,254 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 88 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:00,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:16:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14303 states. [2022-12-14 11:16:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14303 to 14303. [2022-12-14 11:16:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14303 states, 14302 states have (on average 1.1762690532792617) internal successors, (16823), 14302 states have internal predecessors, (16823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14303 states to 14303 states and 16823 transitions. [2022-12-14 11:16:00,451 INFO L78 Accepts]: Start accepts. Automaton has 14303 states and 16823 transitions. Word has length 213 [2022-12-14 11:16:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:00,451 INFO L495 AbstractCegarLoop]: Abstraction has 14303 states and 16823 transitions. [2022-12-14 11:16:00,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 14303 states and 16823 transitions. [2022-12-14 11:16:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-12-14 11:16:00,459 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:00,459 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-12-14 11:16:00,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:16:00,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:16:00,661 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:00,662 INFO L85 PathProgramCache]: Analyzing trace with hash 189655311, now seen corresponding path program 1 times [2022-12-14 11:16:00,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:00,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158492399] [2022-12-14 11:16:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:00,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:16:01,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158492399] [2022-12-14 11:16:01,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158492399] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:16:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549396753] [2022-12-14 11:16:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:01,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:16:01,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:16:01,707 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:16:01,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:16:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:16:01,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:16:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 11:16:02,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:16:02,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549396753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:02,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:16:02,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:16:02,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767951806] [2022-12-14 11:16:02,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:02,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:16:02,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:02,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:16:02,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:16:02,118 INFO L87 Difference]: Start difference. First operand 14303 states and 16823 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:02,671 INFO L93 Difference]: Finished difference Result 39759 states and 46697 transitions. [2022-12-14 11:16:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:16:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-12-14 11:16:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:02,705 INFO L225 Difference]: With dead ends: 39759 [2022-12-14 11:16:02,705 INFO L226 Difference]: Without dead ends: 25457 [2022-12-14 11:16:02,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:16:02,718 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:02,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 61 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:16:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25457 states. [2022-12-14 11:16:03,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25457 to 21167. [2022-12-14 11:16:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21167 states, 21166 states have (on average 1.1885571199092886) internal successors, (25157), 21166 states have internal predecessors, (25157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21167 states to 21167 states and 25157 transitions. [2022-12-14 11:16:03,039 INFO L78 Accepts]: Start accepts. Automaton has 21167 states and 25157 transitions. Word has length 239 [2022-12-14 11:16:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:03,039 INFO L495 AbstractCegarLoop]: Abstraction has 21167 states and 25157 transitions. [2022-12-14 11:16:03,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 21167 states and 25157 transitions. [2022-12-14 11:16:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-12-14 11:16:03,051 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:03,051 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-12-14 11:16:03,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 11:16:03,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:16:03,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:03,254 INFO L85 PathProgramCache]: Analyzing trace with hash 126899510, now seen corresponding path program 1 times [2022-12-14 11:16:03,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:03,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493360287] [2022-12-14 11:16:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:03,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:16:03,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:03,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493360287] [2022-12-14 11:16:03,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493360287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:03,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:03,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:16:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520445190] [2022-12-14 11:16:03,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:03,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:16:03,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:03,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:16:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:16:03,414 INFO L87 Difference]: Start difference. First operand 21167 states and 25157 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:04,054 INFO L93 Difference]: Finished difference Result 46909 states and 55986 transitions. [2022-12-14 11:16:04,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:16:04,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-12-14 11:16:04,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:04,073 INFO L225 Difference]: With dead ends: 46909 [2022-12-14 11:16:04,073 INFO L226 Difference]: Without dead ends: 25743 [2022-12-14 11:16:04,085 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 11:16:04,086 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 152 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:04,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 205 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:16:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25743 states. [2022-12-14 11:16:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25743 to 25743. [2022-12-14 11:16:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25743 states, 25742 states have (on average 1.1707326548053765) internal successors, (30137), 25742 states have internal predecessors, (30137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25743 states to 25743 states and 30137 transitions. [2022-12-14 11:16:04,356 INFO L78 Accepts]: Start accepts. Automaton has 25743 states and 30137 transitions. Word has length 254 [2022-12-14 11:16:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:04,356 INFO L495 AbstractCegarLoop]: Abstraction has 25743 states and 30137 transitions. [2022-12-14 11:16:04,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 25743 states and 30137 transitions. [2022-12-14 11:16:04,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-12-14 11:16:04,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:04,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-12-14 11:16:04,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 11:16:04,369 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:04,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1770509304, now seen corresponding path program 1 times [2022-12-14 11:16:04,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:04,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519863800] [2022-12-14 11:16:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:04,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:16:04,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:04,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519863800] [2022-12-14 11:16:04,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519863800] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:04,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:04,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:16:04,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381807033] [2022-12-14 11:16:04,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:04,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:16:04,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:04,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:16:04,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:16:04,499 INFO L87 Difference]: Start difference. First operand 25743 states and 30137 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:05,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:05,031 INFO L93 Difference]: Finished difference Result 60780 states and 70982 transitions. [2022-12-14 11:16:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:16:05,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-12-14 11:16:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:05,060 INFO L225 Difference]: With dead ends: 60780 [2022-12-14 11:16:05,060 INFO L226 Difference]: Without dead ends: 35038 [2022-12-14 11:16:05,071 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 11:16:05,072 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 126 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:05,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 204 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:16:05,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35038 states. [2022-12-14 11:16:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35038 to 31749. [2022-12-14 11:16:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31749 states, 31748 states have (on average 1.1411427491495527) internal successors, (36229), 31748 states have internal predecessors, (36229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31749 states to 31749 states and 36229 transitions. [2022-12-14 11:16:05,505 INFO L78 Accepts]: Start accepts. Automaton has 31749 states and 36229 transitions. Word has length 266 [2022-12-14 11:16:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:05,505 INFO L495 AbstractCegarLoop]: Abstraction has 31749 states and 36229 transitions. [2022-12-14 11:16:05,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 31749 states and 36229 transitions. [2022-12-14 11:16:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-12-14 11:16:05,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:05,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 11:16:05,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 11:16:05,526 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:05,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:05,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1400947845, now seen corresponding path program 1 times [2022-12-14 11:16:05,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:05,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534686598] [2022-12-14 11:16:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:05,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:16:05,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534686598] [2022-12-14 11:16:05,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534686598] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:16:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225283103] [2022-12-14 11:16:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:05,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:16:05,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:16:05,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:16:05,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:16:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:16:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:16:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:16:06,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:16:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:16:06,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225283103] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:16:06,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1150512264] [2022-12-14 11:16:06,609 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 11:16:06,609 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:16:06,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:16:06,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:16:06,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:21:35,247 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 55 [2022-12-14 11:21:35,996 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 94816 conjuctions. This might take some time... [2022-12-14 11:21:42,474 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 368 conjuctions. [2022-12-14 11:21:42,493 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 55 [2022-12-14 11:21:43,214 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 94816 conjuctions. This might take some time... [2022-12-14 11:21:49,803 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 368 conjuctions. [2022-12-14 11:21:50,474 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 55 [2022-12-14 11:21:51,179 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 94816 conjuctions. This might take some time... [2022-12-14 11:21:57,724 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 368 conjuctions. [2022-12-14 11:22:30,462 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:22:49,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1150512264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:49,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:22:49,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 3, 3] total 12 [2022-12-14 11:22:49,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279462279] [2022-12-14 11:22:49,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:49,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:22:49,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:49,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:22:49,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:22:49,190 INFO L87 Difference]: Start difference. First operand 31749 states and 36229 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:53,950 INFO L93 Difference]: Finished difference Result 64083 states and 73191 transitions. [2022-12-14 11:22:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:22:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2022-12-14 11:22:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:53,976 INFO L225 Difference]: With dead ends: 64083 [2022-12-14 11:22:53,976 INFO L226 Difference]: Without dead ends: 32335 [2022-12-14 11:22:53,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 557 SyntacticMatches, 247 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:22:53,991 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 279 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:53,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 78 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 11:22:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32335 states. [2022-12-14 11:22:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32335 to 32176. [2022-12-14 11:22:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32176 states, 32175 states have (on average 1.1421289821289822) internal successors, (36748), 32175 states have internal predecessors, (36748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32176 states to 32176 states and 36748 transitions. [2022-12-14 11:22:54,338 INFO L78 Accepts]: Start accepts. Automaton has 32176 states and 36748 transitions. Word has length 271 [2022-12-14 11:22:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:54,338 INFO L495 AbstractCegarLoop]: Abstraction has 32176 states and 36748 transitions. [2022-12-14 11:22:54,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 32176 states and 36748 transitions. [2022-12-14 11:22:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-12-14 11:22:54,353 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:54,354 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 11:22:54,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 11:22:54,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 11:22:54,556 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2033450855, now seen corresponding path program 1 times [2022-12-14 11:22:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:54,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058895763] [2022-12-14 11:22:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:54,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 11:22:54,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058895763] [2022-12-14 11:22:54,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058895763] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:54,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:54,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:22:54,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63883892] [2022-12-14 11:22:54,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:54,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:22:54,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:22:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:22:54,976 INFO L87 Difference]: Start difference. First operand 32176 states and 36748 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:55,535 INFO L93 Difference]: Finished difference Result 64353 states and 73434 transitions. [2022-12-14 11:22:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:22:55,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2022-12-14 11:22:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:55,562 INFO L225 Difference]: With dead ends: 64353 [2022-12-14 11:22:55,562 INFO L226 Difference]: Without dead ends: 32605 [2022-12-14 11:22:55,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:22:55,575 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:55,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 82 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:22:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32605 states. [2022-12-14 11:22:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32605 to 32605. [2022-12-14 11:22:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32605 states, 32604 states have (on average 1.141025641025641) internal successors, (37202), 32604 states have internal predecessors, (37202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32605 states to 32605 states and 37202 transitions. [2022-12-14 11:22:55,927 INFO L78 Accepts]: Start accepts. Automaton has 32605 states and 37202 transitions. Word has length 280 [2022-12-14 11:22:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:55,928 INFO L495 AbstractCegarLoop]: Abstraction has 32605 states and 37202 transitions. [2022-12-14 11:22:55,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 32605 states and 37202 transitions. [2022-12-14 11:22:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-12-14 11:22:55,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:55,944 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:22:55,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 11:22:55,944 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1335582407, now seen corresponding path program 1 times [2022-12-14 11:22:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239565447] [2022-12-14 11:22:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:55,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 11:22:56,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:56,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239565447] [2022-12-14 11:22:56,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239565447] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:22:56,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177698125] [2022-12-14 11:22:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:56,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:22:56,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:22:56,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:22:56,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:22:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:56,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:22:56,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:22:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 11:22:56,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:22:56,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177698125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:56,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:22:56,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 11:22:56,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567323089] [2022-12-14 11:22:56,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:56,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:22:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:22:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:22:56,436 INFO L87 Difference]: Start difference. First operand 32605 states and 37202 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:57,356 INFO L93 Difference]: Finished difference Result 104824 states and 119616 transitions. [2022-12-14 11:22:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:22:57,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2022-12-14 11:22:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:57,419 INFO L225 Difference]: With dead ends: 104824 [2022-12-14 11:22:57,419 INFO L226 Difference]: Without dead ends: 73076 [2022-12-14 11:22:57,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:22:57,441 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 513 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:57,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 170 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:22:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73076 states. [2022-12-14 11:22:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73076 to 66210. [2022-12-14 11:22:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66210 states, 66209 states have (on average 1.1439683426724463) internal successors, (75741), 66209 states have internal predecessors, (75741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66210 states to 66210 states and 75741 transitions. [2022-12-14 11:22:58,234 INFO L78 Accepts]: Start accepts. Automaton has 66210 states and 75741 transitions. Word has length 282 [2022-12-14 11:22:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:58,234 INFO L495 AbstractCegarLoop]: Abstraction has 66210 states and 75741 transitions. [2022-12-14 11:22:58,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 66210 states and 75741 transitions. [2022-12-14 11:22:58,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-12-14 11:22:58,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:58,255 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:22:58,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:22:58,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 11:22:58,458 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash 516931680, now seen corresponding path program 1 times [2022-12-14 11:22:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:58,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998763613] [2022-12-14 11:22:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:58,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 11:22:58,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:58,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998763613] [2022-12-14 11:22:58,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998763613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:22:58,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264201725] [2022-12-14 11:22:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:58,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:22:58,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:22:58,774 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:22:58,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:22:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:58,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:22:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:22:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:59,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:22:59,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264201725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:59,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:22:59,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-12-14 11:22:59,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991397102] [2022-12-14 11:22:59,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:59,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:22:59,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:22:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:22:59,231 INFO L87 Difference]: Start difference. First operand 66210 states and 75741 transitions. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:00,987 INFO L93 Difference]: Finished difference Result 300166 states and 343895 transitions. [2022-12-14 11:23:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:23:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2022-12-14 11:23:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:01,283 INFO L225 Difference]: With dead ends: 300166 [2022-12-14 11:23:01,283 INFO L226 Difference]: Without dead ends: 234813 [2022-12-14 11:23:01,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:23:01,337 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 447 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:01,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 530 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:23:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234813 states. [2022-12-14 11:23:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234813 to 233520. [2022-12-14 11:23:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233520 states, 233519 states have (on average 1.1382114517448259) internal successors, (265794), 233519 states have internal predecessors, (265794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233520 states to 233520 states and 265794 transitions. [2022-12-14 11:23:04,738 INFO L78 Accepts]: Start accepts. Automaton has 233520 states and 265794 transitions. Word has length 285 [2022-12-14 11:23:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:04,738 INFO L495 AbstractCegarLoop]: Abstraction has 233520 states and 265794 transitions. [2022-12-14 11:23:04,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 233520 states and 265794 transitions. [2022-12-14 11:23:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-12-14 11:23:04,767 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:04,767 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 11:23:04,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:23:04,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 11:23:04,969 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:04,970 INFO L85 PathProgramCache]: Analyzing trace with hash 507665932, now seen corresponding path program 1 times [2022-12-14 11:23:04,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:04,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522574468] [2022-12-14 11:23:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:04,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 11:23:05,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:05,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522574468] [2022-12-14 11:23:05,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522574468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:05,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:23:05,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:23:05,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995671603] [2022-12-14 11:23:05,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:05,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:23:05,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:05,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:23:05,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:05,267 INFO L87 Difference]: Start difference. First operand 233520 states and 265794 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:07,352 INFO L93 Difference]: Finished difference Result 491064 states and 562455 transitions. [2022-12-14 11:23:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:23:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 298 [2022-12-14 11:23:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:07,627 INFO L225 Difference]: With dead ends: 491064 [2022-12-14 11:23:07,627 INFO L226 Difference]: Without dead ends: 258128 [2022-12-14 11:23:07,770 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 11:23:07,770 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:07,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 182 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:23:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258128 states. [2022-12-14 11:23:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258128 to 249396. [2022-12-14 11:23:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249396 states, 249395 states have (on average 1.1430181038112233) internal successors, (285063), 249395 states have internal predecessors, (285063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249396 states to 249396 states and 285063 transitions. [2022-12-14 11:23:11,359 INFO L78 Accepts]: Start accepts. Automaton has 249396 states and 285063 transitions. Word has length 298 [2022-12-14 11:23:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:11,359 INFO L495 AbstractCegarLoop]: Abstraction has 249396 states and 285063 transitions. [2022-12-14 11:23:11,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 249396 states and 285063 transitions. [2022-12-14 11:23:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-12-14 11:23:11,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:11,418 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 11:23:11,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 11:23:11,418 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:11,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:11,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1464290724, now seen corresponding path program 1 times [2022-12-14 11:23:11,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:11,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906863157] [2022-12-14 11:23:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:11,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 11:23:11,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906863157] [2022-12-14 11:23:11,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906863157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:23:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187679559] [2022-12-14 11:23:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:11,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:23:11,906 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:23:11,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:23:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:12,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:23:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:23:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 11:23:12,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:23:12,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187679559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:12,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:23:12,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 11:23:12,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718714346] [2022-12-14 11:23:12,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:12,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:23:12,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:23:12,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:23:12,123 INFO L87 Difference]: Start difference. First operand 249396 states and 285063 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:14,890 INFO L93 Difference]: Finished difference Result 701852 states and 804346 transitions. [2022-12-14 11:23:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:23:14,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2022-12-14 11:23:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:15,575 INFO L225 Difference]: With dead ends: 701852 [2022-12-14 11:23:15,575 INFO L226 Difference]: Without dead ends: 453173 [2022-12-14 11:23:15,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:23:15,660 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 345 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:15,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 246 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:23:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453173 states. [2022-12-14 11:23:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453173 to 438299. [2022-12-14 11:23:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438299 states, 438298 states have (on average 1.1495580632355156) internal successors, (503849), 438298 states have internal predecessors, (503849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438299 states to 438299 states and 503849 transitions. [2022-12-14 11:23:22,206 INFO L78 Accepts]: Start accepts. Automaton has 438299 states and 503849 transitions. Word has length 305 [2022-12-14 11:23:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:22,206 INFO L495 AbstractCegarLoop]: Abstraction has 438299 states and 503849 transitions. [2022-12-14 11:23:22,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 438299 states and 503849 transitions. [2022-12-14 11:23:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-12-14 11:23:22,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:22,230 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 11:23:22,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:23:22,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:22,432 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:22,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1407142142, now seen corresponding path program 1 times [2022-12-14 11:23:22,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:22,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460047363] [2022-12-14 11:23:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:22,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 169 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:23:23,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:23,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460047363] [2022-12-14 11:23:23,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460047363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:23:23,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586049435] [2022-12-14 11:23:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:23,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:23,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:23:23,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:23:23,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:23:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:23,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:23:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:23:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:23:23,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:23:23,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586049435] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:23,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:23:23,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2022-12-14 11:23:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602455870] [2022-12-14 11:23:23,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:23,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:23:23,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:23:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:23:23,673 INFO L87 Difference]: Start difference. First operand 438299 states and 503849 transitions. Second operand has 5 states, 5 states have (on average 62.6) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:29,619 INFO L93 Difference]: Finished difference Result 1443023 states and 1650268 transitions. [2022-12-14 11:23:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:23:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2022-12-14 11:23:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:31,126 INFO L225 Difference]: With dead ends: 1443023 [2022-12-14 11:23:31,127 INFO L226 Difference]: Without dead ends: 1005441 [2022-12-14 11:23:31,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:23:31,321 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 436 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:31,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 357 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:23:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005441 states. [2022-12-14 11:23:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005441 to 1003149. [2022-12-14 11:23:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003149 states, 1003148 states have (on average 1.139867696491445) internal successors, (1143456), 1003148 states have internal predecessors, (1143456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003149 states to 1003149 states and 1143456 transitions. [2022-12-14 11:23:46,788 INFO L78 Accepts]: Start accepts. Automaton has 1003149 states and 1143456 transitions. Word has length 313 [2022-12-14 11:23:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:46,789 INFO L495 AbstractCegarLoop]: Abstraction has 1003149 states and 1143456 transitions. [2022-12-14 11:23:46,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1003149 states and 1143456 transitions. [2022-12-14 11:23:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-12-14 11:23:46,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:46,840 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 11:23:46,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 11:23:47,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 11:23:47,042 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash -811192781, now seen corresponding path program 1 times [2022-12-14 11:23:47,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:47,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981722725] [2022-12-14 11:23:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 11:23:47,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:47,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981722725] [2022-12-14 11:23:47,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981722725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:47,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:23:47,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:23:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332348219] [2022-12-14 11:23:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:47,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:23:47,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:23:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:47,660 INFO L87 Difference]: Start difference. First operand 1003149 states and 1143456 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:23:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:55,003 INFO L93 Difference]: Finished difference Result 2062352 states and 2347907 transitions. [2022-12-14 11:23:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:23:55,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 336 [2022-12-14 11:23:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:56,677 INFO L225 Difference]: With dead ends: 2062352 [2022-12-14 11:23:56,677 INFO L226 Difference]: Without dead ends: 1059920 [2022-12-14 11:23:57,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:23:57,010 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:57,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:23:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059920 states. [2022-12-14 11:24:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059920 to 1057632. [2022-12-14 11:24:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057632 states, 1057631 states have (on average 1.1346225668498748) internal successors, (1200012), 1057631 states have internal predecessors, (1200012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:24:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057632 states to 1057632 states and 1200012 transitions. [2022-12-14 11:24:12,545 INFO L78 Accepts]: Start accepts. Automaton has 1057632 states and 1200012 transitions. Word has length 336 [2022-12-14 11:24:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:24:12,545 INFO L495 AbstractCegarLoop]: Abstraction has 1057632 states and 1200012 transitions. [2022-12-14 11:24:12,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:24:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1057632 states and 1200012 transitions. [2022-12-14 11:24:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-12-14 11:24:12,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:24:12,595 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:24:12,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 11:24:12,595 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:24:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:24:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash -900108656, now seen corresponding path program 1 times [2022-12-14 11:24:12,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:24:12,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777179616] [2022-12-14 11:24:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:12,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:24:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 209 proven. 3 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-12-14 11:24:12,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:24:12,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777179616] [2022-12-14 11:24:12,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777179616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:24:12,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973285541] [2022-12-14 11:24:12,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:12,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:24:12,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:24:12,970 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:24:12,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b6e6c2-d5ac-4e12-9824-72f2647bb51a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:24:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:13,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:24:13,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:24:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 11:24:13,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:24:13,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973285541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:24:13,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:24:13,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 11:24:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540577525] [2022-12-14 11:24:13,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:24:13,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:24:13,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:24:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:24:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:24:13,191 INFO L87 Difference]: Start difference. First operand 1057632 states and 1200012 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)