./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF --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 e328965cea0bb66eb9fefef2406463fafd513fe2a95976e689a71eb96c010564 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:11:14,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:11:14,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:11:14,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:11:14,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:11:14,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:11:14,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:11:14,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:11:14,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:11:14,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:11:14,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:11:14,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:11:14,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:11:14,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:11:14,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:11:14,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:11:14,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:11:14,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:11:14,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:11:14,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:11:14,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:11:14,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:11:14,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:11:14,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:11:14,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:11:14,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:11:14,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:11:14,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:11:14,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:11:14,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:11:14,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:11:14,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:11:14,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:11:14,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:11:14,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:11:14,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:11:14,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:11:14,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:11:14,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:11:14,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:11:14,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:11:14,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:11:14,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:11:14,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:11:14,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:11:14,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:11:14,511 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:11:14,511 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:11:14,511 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:11:14,511 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:11:14,512 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:11:14,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:11:14,512 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:11:14,512 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:11:14,513 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:11:14,513 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:11:14,513 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:11:14,513 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:11:14,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:11:14,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:11:14,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:11:14,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:11:14,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:11:14,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:11:14,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:11:14,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:11:14,516 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:11:14,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:11:14,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:11:14,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:11:14,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:11:14,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:11:14,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:11:14,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:11:14,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:11:14,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:11:14,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:11:14,519 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:11:14,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:11:14,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:11:14,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:11:14,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:11:14,520 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e328965cea0bb66eb9fefef2406463fafd513fe2a95976e689a71eb96c010564 [2021-11-12 23:11:14,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:11:14,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:11:14,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:11:14,860 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:11:14,861 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:11:14,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:11:14,942 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/data/219ba8330/0bb1c4bf9b414d339330fd481df01078/FLAG053a3726b [2021-11-12 23:11:15,568 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:11:15,573 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:11:15,596 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/data/219ba8330/0bb1c4bf9b414d339330fd481df01078/FLAG053a3726b [2021-11-12 23:11:15,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/data/219ba8330/0bb1c4bf9b414d339330fd481df01078 [2021-11-12 23:11:15,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:11:15,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:11:15,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:11:15,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:11:15,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:11:15,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:11:15" (1/1) ... [2021-11-12 23:11:15,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@529439bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:15, skipping insertion in model container [2021-11-12 23:11:15,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:11:15" (1/1) ... [2021-11-12 23:11:15,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:11:15,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:11:16,217 WARN L228 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_1894a903-4be6-43c2-bacc-8affb4f08ca1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6636,6649] [2021-11-12 23:11:16,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:11:16,276 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:11:16,322 WARN L228 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_1894a903-4be6-43c2-bacc-8affb4f08ca1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6636,6649] [2021-11-12 23:11:16,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:11:16,373 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:11:16,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16 WrapperNode [2021-11-12 23:11:16,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:11:16,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:11:16,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:11:16,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:11:16,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:11:16,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:11:16,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:11:16,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:11:16,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:11:16,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:11:16,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:11:16,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:11:16,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (1/1) ... [2021-11-12 23:11:16,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:11:16,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:11:16,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:11:16,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:11:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:11:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:11:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:11:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:11:17,344 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:11:17,344 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:11:17,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:11:17 BoogieIcfgContainer [2021-11-12 23:11:17,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:11:17,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:11:17,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:11:17,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:11:17,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:11:15" (1/3) ... [2021-11-12 23:11:17,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e3871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:11:17, skipping insertion in model container [2021-11-12 23:11:17,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:11:16" (2/3) ... [2021-11-12 23:11:17,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e3871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:11:17, skipping insertion in model container [2021-11-12 23:11:17,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:11:17" (3/3) ... [2021-11-12 23:11:17,357 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:11:17,363 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:11:17,363 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:11:17,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:11:17,430 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:11:17,433 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:11:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 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) [2021-11-12 23:11:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-12 23:11:17,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:17,461 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:11:17,462 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:17,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1205490657, now seen corresponding path program 1 times [2021-11-12 23:11:17,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:17,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141583608] [2021-11-12 23:11:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:17,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:17,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:17,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141583608] [2021-11-12 23:11:17,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141583608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:17,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:17,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:11:17,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763984083] [2021-11-12 23:11:17,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:17,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:17,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:17,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:11:17,959 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 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 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-12 23:11:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:18,237 INFO L93 Difference]: Finished difference Result 148 states and 241 transitions. [2021-11-12 23:11:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:11:18,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 52 [2021-11-12 23:11:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:18,258 INFO L225 Difference]: With dead ends: 148 [2021-11-12 23:11:18,258 INFO L226 Difference]: Without dead ends: 84 [2021-11-12 23:11:18,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:18,268 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 388 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.62ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:18,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 92 Invalid, 76 Unknown, 0 Unchecked, 15.62ms Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 134.36ms Time] [2021-11-12 23:11:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-12 23:11:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-12 23:11:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.216867469879518) internal successors, (101), 83 states have internal predecessors, (101), 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) [2021-11-12 23:11:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-11-12 23:11:18,348 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 52 [2021-11-12 23:11:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:18,348 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-11-12 23:11:18,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-12 23:11:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-11-12 23:11:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-12 23:11:18,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:18,352 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:11:18,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:11:18,353 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:18,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1453558564, now seen corresponding path program 1 times [2021-11-12 23:11:18,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:18,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472008388] [2021-11-12 23:11:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:18,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:18,551 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:18,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472008388] [2021-11-12 23:11:18,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472008388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:18,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:18,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:11:18,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682504753] [2021-11-12 23:11:18,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:18,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:18,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:18,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:11:18,559 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-12 23:11:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:18,699 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2021-11-12 23:11:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:11:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-12 23:11:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:18,703 INFO L225 Difference]: With dead ends: 132 [2021-11-12 23:11:18,703 INFO L226 Difference]: Without dead ends: 84 [2021-11-12 23:11:18,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:18,711 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 236 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:18,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 70 Invalid, 58 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [7 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 82.53ms Time] [2021-11-12 23:11:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-12 23:11:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-12 23:11:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 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) [2021-11-12 23:11:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2021-11-12 23:11:18,740 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 53 [2021-11-12 23:11:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:18,742 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2021-11-12 23:11:18,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-12 23:11:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2021-11-12 23:11:18,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 23:11:18,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:18,754 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:11:18,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:11:18,755 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash 357478591, now seen corresponding path program 1 times [2021-11-12 23:11:18,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:18,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816010344] [2021-11-12 23:11:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:18,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:18,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:18,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816010344] [2021-11-12 23:11:18,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816010344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:18,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:18,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:11:18,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274940121] [2021-11-12 23:11:18,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:18,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:18,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:18,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:11:18,890 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-12 23:11:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:19,007 INFO L93 Difference]: Finished difference Result 128 states and 156 transitions. [2021-11-12 23:11:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:11:19,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-11-12 23:11:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:19,011 INFO L225 Difference]: With dead ends: 128 [2021-11-12 23:11:19,011 INFO L226 Difference]: Without dead ends: 84 [2021-11-12 23:11:19,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:19,022 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 218 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.48ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:19,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 78 Invalid, 56 Unknown, 0 Unchecked, 3.48ms Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 74.06ms Time] [2021-11-12 23:11:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-12 23:11:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-12 23:11:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 83 states have internal predecessors, (97), 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) [2021-11-12 23:11:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-11-12 23:11:19,040 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 54 [2021-11-12 23:11:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:19,041 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-11-12 23:11:19,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-12 23:11:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-11-12 23:11:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 23:11:19,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:19,043 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:11:19,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:11:19,043 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:19,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash 874907768, now seen corresponding path program 1 times [2021-11-12 23:11:19,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:19,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953673429] [2021-11-12 23:11:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:19,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:19,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:19,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953673429] [2021-11-12 23:11:19,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953673429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:19,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:19,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:11:19,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161718658] [2021-11-12 23:11:19,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:19,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:19,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:19,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:11:19,147 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-12 23:11:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:19,263 INFO L93 Difference]: Finished difference Result 136 states and 161 transitions. [2021-11-12 23:11:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:11:19,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2021-11-12 23:11:19,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:19,265 INFO L225 Difference]: With dead ends: 136 [2021-11-12 23:11:19,265 INFO L226 Difference]: Without dead ends: 84 [2021-11-12 23:11:19,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:19,267 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 235 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:19,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 62 Invalid, 54 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 88.06ms Time] [2021-11-12 23:11:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-12 23:11:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-12 23:11:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.144578313253012) internal successors, (95), 83 states have internal predecessors, (95), 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) [2021-11-12 23:11:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2021-11-12 23:11:19,279 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 55 [2021-11-12 23:11:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:19,279 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-11-12 23:11:19,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-12 23:11:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2021-11-12 23:11:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 23:11:19,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:19,281 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:11:19,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:11:19,282 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:19,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:19,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1550138297, now seen corresponding path program 1 times [2021-11-12 23:11:19,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:19,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100276179] [2021-11-12 23:11:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:19,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:25,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:25,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100276179] [2021-11-12 23:11:25,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100276179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:25,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:25,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-12 23:11:25,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46601504] [2021-11-12 23:11:25,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:25,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-12 23:11:25,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:25,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-12 23:11:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:11:25,586 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 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) [2021-11-12 23:11:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:31,587 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2021-11-12 23:11:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-12 23:11:31,588 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 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 56 [2021-11-12 23:11:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:31,589 INFO L225 Difference]: With dead ends: 147 [2021-11-12 23:11:31,590 INFO L226 Difference]: Without dead ends: 114 [2021-11-12 23:11:31,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=676, Invalid=2080, Unknown=0, NotChecked=0, Total=2756 [2021-11-12 23:11:31,593 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 463 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1277.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.65ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1473.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:31,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 610 Invalid, 1137 Unknown, 0 Unchecked, 15.65ms Time], IncrementalHoareTripleChecker [38 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1473.92ms Time] [2021-11-12 23:11:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-12 23:11:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-11-12 23:11:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 111 states have internal predecessors, (132), 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) [2021-11-12 23:11:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2021-11-12 23:11:31,619 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 56 [2021-11-12 23:11:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:31,620 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2021-11-12 23:11:31,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 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) [2021-11-12 23:11:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2021-11-12 23:11:31,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:11:31,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:31,621 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:11:31,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:11:31,622 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:31,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash -498904212, now seen corresponding path program 1 times [2021-11-12 23:11:31,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:31,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447370076] [2021-11-12 23:11:31,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:31,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:31,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:31,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447370076] [2021-11-12 23:11:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447370076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:31,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:31,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:11:31,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306901132] [2021-11-12 23:11:31,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:31,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:11:31,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:31,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:11:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:11:31,750 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-12 23:11:31,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:31,821 INFO L93 Difference]: Finished difference Result 234 states and 294 transitions. [2021-11-12 23:11:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:11:31,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-12 23:11:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:31,825 INFO L225 Difference]: With dead ends: 234 [2021-11-12 23:11:31,825 INFO L226 Difference]: Without dead ends: 173 [2021-11-12 23:11:31,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:11:31,827 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 40 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:31,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 245 Invalid, 42 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 48.28ms Time] [2021-11-12 23:11:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-12 23:11:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-11-12 23:11:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2411764705882353) internal successors, (211), 170 states have internal predecessors, (211), 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) [2021-11-12 23:11:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 211 transitions. [2021-11-12 23:11:31,854 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 211 transitions. Word has length 58 [2021-11-12 23:11:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:31,855 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 211 transitions. [2021-11-12 23:11:31,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-12 23:11:31,855 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 211 transitions. [2021-11-12 23:11:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:11:31,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:31,857 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:11:31,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:11:31,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash -335560159, now seen corresponding path program 1 times [2021-11-12 23:11:31,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:31,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672927202] [2021-11-12 23:11:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:31,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:37,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:37,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672927202] [2021-11-12 23:11:37,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672927202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:37,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:37,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-12 23:11:37,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462713352] [2021-11-12 23:11:37,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:37,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 23:11:37,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 23:11:37,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:11:37,570 INFO L87 Difference]: Start difference. First operand 171 states and 211 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 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) [2021-11-12 23:11:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:43,167 INFO L93 Difference]: Finished difference Result 324 states and 413 transitions. [2021-11-12 23:11:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 23:11:43,168 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 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 58 [2021-11-12 23:11:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:43,170 INFO L225 Difference]: With dead ends: 324 [2021-11-12 23:11:43,171 INFO L226 Difference]: Without dead ends: 204 [2021-11-12 23:11:43,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=748, Invalid=2008, Unknown=0, NotChecked=0, Total=2756 [2021-11-12 23:11:43,174 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 391 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 817.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.56ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 947.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:43,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 373 Invalid, 717 Unknown, 0 Unchecked, 7.56ms Time], IncrementalHoareTripleChecker [31 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 947.37ms Time] [2021-11-12 23:11:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-12 23:11:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2021-11-12 23:11:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.2487562189054726) internal successors, (251), 201 states have internal predecessors, (251), 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) [2021-11-12 23:11:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 251 transitions. [2021-11-12 23:11:43,203 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 251 transitions. Word has length 58 [2021-11-12 23:11:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:43,204 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 251 transitions. [2021-11-12 23:11:43,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 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) [2021-11-12 23:11:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 251 transitions. [2021-11-12 23:11:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:11:43,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:43,206 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:11:43,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:11:43,207 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1805104453, now seen corresponding path program 1 times [2021-11-12 23:11:43,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:43,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960032953] [2021-11-12 23:11:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:43,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:43,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:43,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960032953] [2021-11-12 23:11:43,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960032953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:43,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:43,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:11:43,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728339335] [2021-11-12 23:11:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:43,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:11:43,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:11:43,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:11:43,291 INFO L87 Difference]: Start difference. First operand 202 states and 251 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-12 23:11:43,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:43,515 INFO L93 Difference]: Finished difference Result 452 states and 579 transitions. [2021-11-12 23:11:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:11:43,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 59 [2021-11-12 23:11:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:43,520 INFO L225 Difference]: With dead ends: 452 [2021-11-12 23:11:43,520 INFO L226 Difference]: Without dead ends: 391 [2021-11-12 23:11:43,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:11:43,523 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 195 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:43,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 486 Invalid, 110 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 122.13ms Time] [2021-11-12 23:11:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-12 23:11:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 203. [2021-11-12 23:11:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.2376237623762376) internal successors, (250), 202 states have internal predecessors, (250), 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) [2021-11-12 23:11:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 250 transitions. [2021-11-12 23:11:43,568 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 250 transitions. Word has length 59 [2021-11-12 23:11:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:43,569 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 250 transitions. [2021-11-12 23:11:43,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-12 23:11:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 250 transitions. [2021-11-12 23:11:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:11:43,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:43,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:43,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:11:43,583 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1776560570, now seen corresponding path program 1 times [2021-11-12 23:11:43,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:43,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795357844] [2021-11-12 23:11:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:43,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:43,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:43,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795357844] [2021-11-12 23:11:43,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795357844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:43,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:43,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:11:43,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223096834] [2021-11-12 23:11:43,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:43,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:43,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:43,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:43,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:43,684 INFO L87 Difference]: Start difference. First operand 203 states and 250 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-12 23:11:43,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:43,767 INFO L93 Difference]: Finished difference Result 386 states and 491 transitions. [2021-11-12 23:11:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:43,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-11-12 23:11:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:43,771 INFO L225 Difference]: With dead ends: 386 [2021-11-12 23:11:43,771 INFO L226 Difference]: Without dead ends: 265 [2021-11-12 23:11:43,772 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:11:43,775 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 35 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:43,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 189 Invalid, 26 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 41.65ms Time] [2021-11-12 23:11:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-12 23:11:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 247. [2021-11-12 23:11:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.2439024390243902) internal successors, (306), 246 states have internal predecessors, (306), 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) [2021-11-12 23:11:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 306 transitions. [2021-11-12 23:11:43,819 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 306 transitions. Word has length 71 [2021-11-12 23:11:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:43,819 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 306 transitions. [2021-11-12 23:11:43,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-12 23:11:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 306 transitions. [2021-11-12 23:11:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:11:43,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:43,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:43,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:11:43,824 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash -243112994, now seen corresponding path program 1 times [2021-11-12 23:11:43,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:43,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049508541] [2021-11-12 23:11:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:43,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:43,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:43,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049508541] [2021-11-12 23:11:43,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049508541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:43,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:43,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:11:43,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473258495] [2021-11-12 23:11:43,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:43,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:43,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:43,903 INFO L87 Difference]: Start difference. First operand 247 states and 306 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-12 23:11:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:44,005 INFO L93 Difference]: Finished difference Result 541 states and 697 transitions. [2021-11-12 23:11:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2021-11-12 23:11:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:44,009 INFO L225 Difference]: With dead ends: 541 [2021-11-12 23:11:44,009 INFO L226 Difference]: Without dead ends: 384 [2021-11-12 23:11:44,010 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:11:44,011 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 30 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.68ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:44,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 183 Invalid, 26 Unknown, 0 Unchecked, 0.68ms Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 33.68ms Time] [2021-11-12 23:11:44,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-12 23:11:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 358. [2021-11-12 23:11:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.2661064425770308) internal successors, (452), 357 states have internal predecessors, (452), 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) [2021-11-12 23:11:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 452 transitions. [2021-11-12 23:11:44,068 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 452 transitions. Word has length 74 [2021-11-12 23:11:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:44,069 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 452 transitions. [2021-11-12 23:11:44,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-12 23:11:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 452 transitions. [2021-11-12 23:11:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 23:11:44,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:44,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:44,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:11:44,071 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1817542333, now seen corresponding path program 1 times [2021-11-12 23:11:44,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:44,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788470209] [2021-11-12 23:11:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:44,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:44,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:44,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788470209] [2021-11-12 23:11:44,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788470209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:44,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:44,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:11:44,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918873227] [2021-11-12 23:11:44,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:44,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:44,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:44,140 INFO L87 Difference]: Start difference. First operand 358 states and 452 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2021-11-12 23:11:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:44,260 INFO L93 Difference]: Finished difference Result 874 states and 1137 transitions. [2021-11-12 23:11:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 77 [2021-11-12 23:11:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:44,266 INFO L225 Difference]: With dead ends: 874 [2021-11-12 23:11:44,266 INFO L226 Difference]: Without dead ends: 612 [2021-11-12 23:11:44,267 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:11:44,268 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 25 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.68ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:44,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 176 Invalid, 27 Unknown, 0 Unchecked, 0.68ms Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 35.20ms Time] [2021-11-12 23:11:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-12 23:11:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 574. [2021-11-12 23:11:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.2827225130890052) internal successors, (735), 573 states have internal predecessors, (735), 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) [2021-11-12 23:11:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 735 transitions. [2021-11-12 23:11:44,359 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 735 transitions. Word has length 77 [2021-11-12 23:11:44,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:44,362 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 735 transitions. [2021-11-12 23:11:44,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2021-11-12 23:11:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 735 transitions. [2021-11-12 23:11:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-12 23:11:44,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:44,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:44,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:11:44,365 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:44,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1145956120, now seen corresponding path program 1 times [2021-11-12 23:11:44,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:44,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912503635] [2021-11-12 23:11:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:44,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:11:44,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:11:44,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912503635] [2021-11-12 23:11:44,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912503635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:44,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:44,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:11:44,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794863703] [2021-11-12 23:11:44,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:44,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:44,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:11:44,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:44,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:44,461 INFO L87 Difference]: Start difference. First operand 574 states and 735 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2021-11-12 23:11:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:44,648 INFO L93 Difference]: Finished difference Result 1522 states and 1988 transitions. [2021-11-12 23:11:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:44,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2021-11-12 23:11:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:44,657 INFO L225 Difference]: With dead ends: 1522 [2021-11-12 23:11:44,657 INFO L226 Difference]: Without dead ends: 1050 [2021-11-12 23:11:44,659 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:11:44,660 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 20 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:44,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 165 Invalid, 28 Unknown, 0 Unchecked, 0.95ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 37.32ms Time] [2021-11-12 23:11:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-11-12 23:11:44,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 988. [2021-11-12 23:11:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 1.2907801418439717) internal successors, (1274), 987 states have internal predecessors, (1274), 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) [2021-11-12 23:11:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1274 transitions. [2021-11-12 23:11:44,843 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1274 transitions. Word has length 80 [2021-11-12 23:11:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:44,843 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 1274 transitions. [2021-11-12 23:11:44,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2021-11-12 23:11:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1274 transitions. [2021-11-12 23:11:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:11:44,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:44,846 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-12 23:11:44,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 23:11:44,847 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:44,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash 393511849, now seen corresponding path program 1 times [2021-11-12 23:11:44,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:11:44,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365952458] [2021-11-12 23:11:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:44,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:11:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:11,291 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:12:11,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365952458] [2021-11-12 23:12:11,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365952458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:12:11,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492781401] [2021-11-12 23:12:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:11,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:12:11,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:12:11,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:12:11,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1894a903-4be6-43c2-bacc-8affb4f08ca1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:12:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:11,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-12 23:12:11,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:49,029 WARN L227 SmtUtils]: Spent 55.27s on a formula simplification. DAG size of input: 219 DAG size of output: 209 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:18:30,674 WARN L227 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 192 DAG size of output: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:18:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:50,482 INFO L328 TraceCheckSpWp]: Computing backward predicates...