./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 57a0d461468e871620bb6a0a3de7e8bdfa4741915d12326365887ea97e191d16 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:43:50,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:43:50,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:43:50,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:43:50,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:43:50,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:43:50,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:43:50,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:43:50,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:43:50,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:43:50,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:43:50,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:43:50,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:43:50,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:43:50,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:43:50,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:43:50,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:43:50,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:43:50,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:43:50,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:43:50,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:43:50,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:43:50,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:43:50,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:43:50,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:43:50,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:43:50,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:43:50,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:43:50,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:43:50,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:43:50,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:43:50,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:43:50,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:43:50,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:43:50,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:43:50,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:43:50,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:43:50,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:43:50,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:43:50,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:43:50,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:43:50,262 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:43:50,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:43:50,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:43:50,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:43:50,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:43:50,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:43:50,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:43:50,283 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:43:50,284 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:43:50,284 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:43:50,284 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:43:50,284 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:43:50,284 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:43:50,284 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:43:50,285 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:43:50,285 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:43:50,285 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:43:50,285 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:43:50,285 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:43:50,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:43:50,286 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:43:50,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:43:50,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:43:50,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:43:50,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:43:50,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:43:50,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:43:50,287 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:43:50,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:43:50,287 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:43:50,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:43:50,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:43:50,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:43:50,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:43:50,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:43:50,288 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:43:50,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:43:50,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:43:50,289 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:43:50,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:43:50,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:43:50,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:43:50,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57a0d461468e871620bb6a0a3de7e8bdfa4741915d12326365887ea97e191d16 [2022-12-14 11:43:50,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:43:50,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:43:50,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:43:50,507 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:43:50,508 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:43:50,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c [2022-12-14 11:43:53,114 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:43:53,305 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:43:53,306 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c [2022-12-14 11:43:53,315 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/data/b3f4c4052/14daba8b65cb413994e8fd125c3f15fd/FLAG75577130f [2022-12-14 11:43:53,326 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/data/b3f4c4052/14daba8b65cb413994e8fd125c3f15fd [2022-12-14 11:43:53,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:43:53,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:43:53,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:43:53,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:43:53,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:43:53,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30485e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53, skipping insertion in model container [2022-12-14 11:43:53,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:43:53,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:43:53,484 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c[911,924] [2022-12-14 11:43:53,528 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c[8416,8429] [2022-12-14 11:43:53,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:43:53,604 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:43:53,613 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c[911,924] [2022-12-14 11:43:53,626 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-2.c[8416,8429] [2022-12-14 11:43:53,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:43:53,677 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:43:53,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53 WrapperNode [2022-12-14 11:43:53,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:43:53,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:43:53,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:43:53,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:43:53,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,724 INFO L138 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1078 [2022-12-14 11:43:53,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:43:53,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:43:53,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:43:53,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:43:53,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:43:53,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:43:53,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:43:53,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:43:53,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (1/1) ... [2022-12-14 11:43:53,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:43:53,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:43:53,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:43:53,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:43:53,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:43:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 11:43:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 11:43:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 11:43:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 11:43:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 11:43:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 11:43:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 11:43:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 11:43:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 11:43:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 11:43:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 11:43:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 11:43:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 11:43:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 11:43:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 11:43:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 11:43:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 11:43:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 11:43:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 11:43:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 11:43:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 11:43:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 11:43:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:43:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 11:43:53,822 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 11:43:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 11:43:53,822 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 11:43:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:43:53,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:43:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 11:43:53,822 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 11:43:53,929 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:43:53,930 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:43:54,549 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-12-14 11:43:54,549 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-12-14 11:43:54,613 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:43:54,913 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:43:54,913 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-12-14 11:43:54,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:43:54 BoogieIcfgContainer [2022-12-14 11:43:54,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:43:54,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:43:54,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:43:54,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:43:54,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:43:53" (1/3) ... [2022-12-14 11:43:54,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16984129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:43:54, skipping insertion in model container [2022-12-14 11:43:54,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:53" (2/3) ... [2022-12-14 11:43:54,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16984129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:43:54, skipping insertion in model container [2022-12-14 11:43:54,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:43:54" (3/3) ... [2022-12-14 11:43:54,927 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.12.cil-2.c [2022-12-14 11:43:54,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:43:54,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 11:43:54,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:43:54,986 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@81c6301, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:43:54,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 11:43:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 267 states, 208 states have (on average 1.5432692307692308) internal successors, (321), 214 states have internal predecessors, (321), 42 states have call successors, (42), 14 states have call predecessors, (42), 14 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 11:43:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 11:43:54,998 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:54,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:54,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:43:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash 608393144, now seen corresponding path program 1 times [2022-12-14 11:43:55,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:43:55,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454523840] [2022-12-14 11:43:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:55,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:43:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:55,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:43:55,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454523840] [2022-12-14 11:43:55,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454523840] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:55,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:43:55,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:43:55,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513136067] [2022-12-14 11:43:55,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:55,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:43:55,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:43:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:43:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:43:55,254 INFO L87 Difference]: Start difference. First operand has 267 states, 208 states have (on average 1.5432692307692308) internal successors, (321), 214 states have internal predecessors, (321), 42 states have call successors, (42), 14 states have call predecessors, (42), 14 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:43:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:55,647 INFO L93 Difference]: Finished difference Result 657 states and 988 transitions. [2022-12-14 11:43:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:43:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-12-14 11:43:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:55,662 INFO L225 Difference]: With dead ends: 657 [2022-12-14 11:43:55,662 INFO L226 Difference]: Without dead ends: 391 [2022-12-14 11:43:55,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:43:55,669 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 457 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:55,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 706 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:43:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-12-14 11:43:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 380. [2022-12-14 11:43:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 289 states have (on average 1.4567474048442905) internal successors, (421), 293 states have internal predecessors, (421), 62 states have call successors, (62), 28 states have call predecessors, (62), 27 states have return successors, (63), 60 states have call predecessors, (63), 60 states have call successors, (63) [2022-12-14 11:43:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 546 transitions. [2022-12-14 11:43:55,740 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 546 transitions. Word has length 44 [2022-12-14 11:43:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:55,741 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 546 transitions. [2022-12-14 11:43:55,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:43:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 546 transitions. [2022-12-14 11:43:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 11:43:55,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:55,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:55,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:43:55,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:43:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash -349720156, now seen corresponding path program 1 times [2022-12-14 11:43:55,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:43:55,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753150504] [2022-12-14 11:43:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:43:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:55,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:43:55,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753150504] [2022-12-14 11:43:55,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753150504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:55,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:43:55,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:43:55,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492422994] [2022-12-14 11:43:55,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:55,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:43:55,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:43:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:43:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:43:55,841 INFO L87 Difference]: Start difference. First operand 380 states and 546 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:43:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:56,519 INFO L93 Difference]: Finished difference Result 917 states and 1269 transitions. [2022-12-14 11:43:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:43:56,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 11:43:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:56,521 INFO L225 Difference]: With dead ends: 917 [2022-12-14 11:43:56,522 INFO L226 Difference]: Without dead ends: 451 [2022-12-14 11:43:56,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:43:56,524 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 974 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:56,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 1202 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:43:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-12-14 11:43:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 366. [2022-12-14 11:43:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 275 states have (on average 1.410909090909091) internal successors, (388), 279 states have internal predecessors, (388), 62 states have call successors, (62), 28 states have call predecessors, (62), 27 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-12-14 11:43:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 510 transitions. [2022-12-14 11:43:56,546 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 510 transitions. Word has length 45 [2022-12-14 11:43:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:56,547 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 510 transitions. [2022-12-14 11:43:56,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:43:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 510 transitions. [2022-12-14 11:43:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 11:43:56,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:56,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:56,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:43:56,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:43:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1999871620, now seen corresponding path program 1 times [2022-12-14 11:43:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:43:56,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961645856] [2022-12-14 11:43:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:43:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:56,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:43:56,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961645856] [2022-12-14 11:43:56,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961645856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:56,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:43:56,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:43:56,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283890729] [2022-12-14 11:43:56,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:56,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:43:56,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:43:56,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:43:56,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:43:56,688 INFO L87 Difference]: Start difference. First operand 366 states and 510 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 11:43:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:57,380 INFO L93 Difference]: Finished difference Result 668 states and 878 transitions. [2022-12-14 11:43:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:43:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-12-14 11:43:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:57,384 INFO L225 Difference]: With dead ends: 668 [2022-12-14 11:43:57,384 INFO L226 Difference]: Without dead ends: 494 [2022-12-14 11:43:57,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:43:57,386 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 552 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:57,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 963 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:43:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-12-14 11:43:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 468. [2022-12-14 11:43:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 343 states have (on average 1.370262390670554) internal successors, (470), 347 states have internal predecessors, (470), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-12-14 11:43:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 632 transitions. [2022-12-14 11:43:57,413 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 632 transitions. Word has length 46 [2022-12-14 11:43:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:57,413 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 632 transitions. [2022-12-14 11:43:57,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 11:43:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 632 transitions. [2022-12-14 11:43:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 11:43:57,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:57,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:57,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:43:57,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:43:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:57,415 INFO L85 PathProgramCache]: Analyzing trace with hash -95010803, now seen corresponding path program 1 times [2022-12-14 11:43:57,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:43:57,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542795895] [2022-12-14 11:43:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:57,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:43:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:57,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:43:57,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542795895] [2022-12-14 11:43:57,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542795895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:57,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:43:57,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:43:57,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298260691] [2022-12-14 11:43:57,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:57,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:43:57,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:43:57,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:43:57,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:43:57,453 INFO L87 Difference]: Start difference. First operand 468 states and 632 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:43:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:57,567 INFO L93 Difference]: Finished difference Result 733 states and 968 transitions. [2022-12-14 11:43:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:43:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-12-14 11:43:57,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:57,568 INFO L225 Difference]: With dead ends: 733 [2022-12-14 11:43:57,568 INFO L226 Difference]: Without dead ends: 187 [2022-12-14 11:43:57,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:43:57,570 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 357 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:57,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 308 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:43:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-14 11:43:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-12-14 11:43:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 154 states have (on average 1.525974025974026) internal successors, (235), 155 states have internal predecessors, (235), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-12-14 11:43:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 287 transitions. [2022-12-14 11:43:57,579 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 287 transitions. Word has length 47 [2022-12-14 11:43:57,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:57,580 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 287 transitions. [2022-12-14 11:43:57,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:43:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 287 transitions. [2022-12-14 11:43:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 11:43:57,581 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:57,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:57,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:43:57,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:43:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1304138759, now seen corresponding path program 1 times [2022-12-14 11:43:57,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:43:57,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230606010] [2022-12-14 11:43:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:57,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:43:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:57,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:43:57,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230606010] [2022-12-14 11:43:57,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230606010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:57,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:43:57,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:43:57,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205866780] [2022-12-14 11:43:57,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:43:57,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:43:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:43:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:43:57,679 INFO L87 Difference]: Start difference. First operand 187 states and 287 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 11:43:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:58,353 INFO L93 Difference]: Finished difference Result 1065 states and 1746 transitions. [2022-12-14 11:43:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:43:58,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-12-14 11:43:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:58,357 INFO L225 Difference]: With dead ends: 1065 [2022-12-14 11:43:58,357 INFO L226 Difference]: Without dead ends: 884 [2022-12-14 11:43:58,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:43:58,359 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 1329 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:58,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1346 Valid, 1321 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:43:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-12-14 11:43:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 873. [2022-12-14 11:43:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 731 states have (on average 1.5280437756497949) internal successors, (1117), 735 states have internal predecessors, (1117), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (173), 108 states have call predecessors, (173), 111 states have call successors, (173) [2022-12-14 11:43:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1401 transitions. [2022-12-14 11:43:58,402 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1401 transitions. Word has length 67 [2022-12-14 11:43:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:58,403 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1401 transitions. [2022-12-14 11:43:58,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 11:43:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1401 transitions. [2022-12-14 11:43:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 11:43:58,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:58,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:58,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:43:58,406 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:43:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash 651457638, now seen corresponding path program 1 times [2022-12-14 11:43:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:43:58,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611961127] [2022-12-14 11:43:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:58,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:43:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:43:58,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:43:58,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611961127] [2022-12-14 11:43:58,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611961127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:43:58,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360468674] [2022-12-14 11:43:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:58,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:43:58,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:43:58,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:43:58,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:43:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:58,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:43:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 11:43:58,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:43:58,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360468674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:58,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:43:58,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:43:58,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408891678] [2022-12-14 11:43:58,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:58,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:43:58,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:43:58,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:43:58,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:43:58,796 INFO L87 Difference]: Start difference. First operand 873 states and 1401 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:43:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:58,991 INFO L93 Difference]: Finished difference Result 2591 states and 4285 transitions. [2022-12-14 11:43:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:43:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 11:43:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:58,998 INFO L225 Difference]: With dead ends: 2591 [2022-12-14 11:43:58,998 INFO L226 Difference]: Without dead ends: 1724 [2022-12-14 11:43:59,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:43:59,002 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 256 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:59,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 482 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:43:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-12-14 11:43:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1717. [2022-12-14 11:43:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1443 states have (on average 1.5246015246015245) internal successors, (2200), 1450 states have internal predecessors, (2200), 213 states have call successors, (213), 60 states have call predecessors, (213), 60 states have return successors, (333), 207 states have call predecessors, (333), 213 states have call successors, (333) [2022-12-14 11:43:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2746 transitions. [2022-12-14 11:43:59,101 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2746 transitions. Word has length 136 [2022-12-14 11:43:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:59,101 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2746 transitions. [2022-12-14 11:43:59,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:43:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2746 transitions. [2022-12-14 11:43:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 11:43:59,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:59,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:59,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:43:59,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:43:59,306 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:43:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:59,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1675833670, now seen corresponding path program 1 times [2022-12-14 11:43:59,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:43:59,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813319758] [2022-12-14 11:43:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:59,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:43:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:43:59,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:43:59,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813319758] [2022-12-14 11:43:59,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813319758] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:43:59,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538592391] [2022-12-14 11:43:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:43:59,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:43:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:43:59,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:43:59,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:43:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:43:59,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:43:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 11:43:59,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:43:59,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538592391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:59,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:43:59,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:43:59,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318526282] [2022-12-14 11:43:59,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:59,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:43:59,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:43:59,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:43:59,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:43:59,684 INFO L87 Difference]: Start difference. First operand 1717 states and 2746 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:43:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:59,945 INFO L93 Difference]: Finished difference Result 5108 states and 8412 transitions. [2022-12-14 11:43:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:43:59,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 11:43:59,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:59,958 INFO L225 Difference]: With dead ends: 5108 [2022-12-14 11:43:59,959 INFO L226 Difference]: Without dead ends: 3397 [2022-12-14 11:43:59,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:43:59,965 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 259 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:59,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 482 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:43:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2022-12-14 11:44:00,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 3385. [2022-12-14 11:44:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 2852 states have (on average 1.5203366058906032) internal successors, (4336), 2865 states have internal predecessors, (4336), 412 states have call successors, (412), 120 states have call predecessors, (412), 120 states have return successors, (644), 400 states have call predecessors, (644), 412 states have call successors, (644) [2022-12-14 11:44:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 5392 transitions. [2022-12-14 11:44:00,127 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 5392 transitions. Word has length 136 [2022-12-14 11:44:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:00,127 INFO L495 AbstractCegarLoop]: Abstraction has 3385 states and 5392 transitions. [2022-12-14 11:44:00,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:44:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 5392 transitions. [2022-12-14 11:44:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 11:44:00,132 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:00,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:00,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:44:00,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:00,333 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:00,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1175402394, now seen corresponding path program 1 times [2022-12-14 11:44:00,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:00,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299629662] [2022-12-14 11:44:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:00,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:44:00,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299629662] [2022-12-14 11:44:00,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299629662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:44:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045603040] [2022-12-14 11:44:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:00,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:00,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:44:00,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:44:00,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:44:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:44:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:44:00,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:44:00,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045603040] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:44:00,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:44:00,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:44:00,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145987076] [2022-12-14 11:44:00,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:44:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:44:00,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:44:00,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:44:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:00,679 INFO L87 Difference]: Start difference. First operand 3385 states and 5392 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:44:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:01,058 INFO L93 Difference]: Finished difference Result 10082 states and 16525 transitions. [2022-12-14 11:44:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:44:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 11:44:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:01,085 INFO L225 Difference]: With dead ends: 10082 [2022-12-14 11:44:01,086 INFO L226 Difference]: Without dead ends: 6703 [2022-12-14 11:44:01,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:01,097 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 238 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:01,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 482 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:44:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6703 states. [2022-12-14 11:44:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6703 to 6681. [2022-12-14 11:44:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6681 states, 5640 states have (on average 1.5156028368794325) internal successors, (8548), 5665 states have internal predecessors, (8548), 800 states have call successors, (800), 240 states have call predecessors, (800), 240 states have return successors, (1248), 776 states have call predecessors, (1248), 800 states have call successors, (1248) [2022-12-14 11:44:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6681 states to 6681 states and 10596 transitions. [2022-12-14 11:44:01,472 INFO L78 Accepts]: Start accepts. Automaton has 6681 states and 10596 transitions. Word has length 136 [2022-12-14 11:44:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:01,472 INFO L495 AbstractCegarLoop]: Abstraction has 6681 states and 10596 transitions. [2022-12-14 11:44:01,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:44:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6681 states and 10596 transitions. [2022-12-14 11:44:01,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 11:44:01,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:01,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:01,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:44:01,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:01,682 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:01,682 INFO L85 PathProgramCache]: Analyzing trace with hash -779158202, now seen corresponding path program 1 times [2022-12-14 11:44:01,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:01,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307509088] [2022-12-14 11:44:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:01,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:44:01,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307509088] [2022-12-14 11:44:01,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307509088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:44:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408554544] [2022-12-14 11:44:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:01,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:01,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:44:01,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:44:01,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:44:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:01,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:44:01,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 11:44:02,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:44:02,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408554544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:44:02,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:44:02,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:44:02,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470158870] [2022-12-14 11:44:02,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:44:02,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:44:02,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:44:02,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:44:02,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:02,035 INFO L87 Difference]: Start difference. First operand 6681 states and 10596 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:44:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:02,748 INFO L93 Difference]: Finished difference Result 19910 states and 32469 transitions. [2022-12-14 11:44:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:44:02,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 11:44:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:02,801 INFO L225 Difference]: With dead ends: 19910 [2022-12-14 11:44:02,801 INFO L226 Difference]: Without dead ends: 13235 [2022-12-14 11:44:02,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:02,824 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 244 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:02,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 482 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:44:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13235 states. [2022-12-14 11:44:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13235 to 13193. [2022-12-14 11:44:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13193 states, 11156 states have (on average 1.5105772678379348) internal successors, (16852), 11205 states have internal predecessors, (16852), 1556 states have call successors, (1556), 480 states have call predecessors, (1556), 480 states have return successors, (2420), 1508 states have call predecessors, (2420), 1556 states have call successors, (2420) [2022-12-14 11:44:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13193 states to 13193 states and 20828 transitions. [2022-12-14 11:44:03,558 INFO L78 Accepts]: Start accepts. Automaton has 13193 states and 20828 transitions. Word has length 136 [2022-12-14 11:44:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:03,559 INFO L495 AbstractCegarLoop]: Abstraction has 13193 states and 20828 transitions. [2022-12-14 11:44:03,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:44:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 13193 states and 20828 transitions. [2022-12-14 11:44:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 11:44:03,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:03,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:03,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:44:03,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 11:44:03,779 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1210714662, now seen corresponding path program 1 times [2022-12-14 11:44:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943191456] [2022-12-14 11:44:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:03,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:44:03,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:03,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943191456] [2022-12-14 11:44:03,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943191456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:44:03,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079674442] [2022-12-14 11:44:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:03,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:03,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:44:03,902 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:44:03,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:44:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:44:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 11:44:04,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:44:04,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079674442] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:44:04,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:44:04,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:44:04,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184756859] [2022-12-14 11:44:04,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:44:04,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:44:04,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:44:04,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:44:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:04,113 INFO L87 Difference]: Start difference. First operand 13193 states and 20828 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:44:05,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:05,147 INFO L93 Difference]: Finished difference Result 39326 states and 63793 transitions. [2022-12-14 11:44:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:44:05,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 11:44:05,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:05,253 INFO L225 Difference]: With dead ends: 39326 [2022-12-14 11:44:05,253 INFO L226 Difference]: Without dead ends: 26139 [2022-12-14 11:44:05,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:05,293 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 250 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:05,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 482 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:44:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26139 states. [2022-12-14 11:44:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26139 to 26057. [2022-12-14 11:44:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26057 states, 22068 states have (on average 1.505347108936016) internal successors, (33220), 22165 states have internal predecessors, (33220), 3028 states have call successors, (3028), 960 states have call predecessors, (3028), 960 states have return successors, (4692), 2932 states have call predecessors, (4692), 3028 states have call successors, (4692) [2022-12-14 11:44:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26057 states to 26057 states and 40940 transitions. [2022-12-14 11:44:06,579 INFO L78 Accepts]: Start accepts. Automaton has 26057 states and 40940 transitions. Word has length 136 [2022-12-14 11:44:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:06,579 INFO L495 AbstractCegarLoop]: Abstraction has 26057 states and 40940 transitions. [2022-12-14 11:44:06,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:44:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 26057 states and 40940 transitions. [2022-12-14 11:44:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 11:44:06,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:06,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:06,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:44:06,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:44:06,804 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash 851439366, now seen corresponding path program 1 times [2022-12-14 11:44:06,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:06,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374675077] [2022-12-14 11:44:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:06,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:44:06,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:06,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374675077] [2022-12-14 11:44:06,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374675077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:44:06,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244852418] [2022-12-14 11:44:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:06,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:06,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:44:06,919 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:44:06,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:44:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:07,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:44:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 11:44:07,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:44:07,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244852418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:44:07,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:44:07,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 11:44:07,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964188132] [2022-12-14 11:44:07,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:44:07,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:44:07,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:44:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:44:07,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:07,099 INFO L87 Difference]: Start difference. First operand 26057 states and 40940 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:44:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:09,390 INFO L93 Difference]: Finished difference Result 77678 states and 125313 transitions. [2022-12-14 11:44:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:44:09,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 11:44:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:09,548 INFO L225 Difference]: With dead ends: 77678 [2022-12-14 11:44:09,549 INFO L226 Difference]: Without dead ends: 51627 [2022-12-14 11:44:09,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:09,615 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 235 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:09,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 482 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:44:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51627 states. [2022-12-14 11:44:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51627 to 51465. [2022-12-14 11:44:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51465 states, 43652 states have (on average 1.4999541830843948) internal successors, (65476), 43845 states have internal predecessors, (65476), 5892 states have call successors, (5892), 1920 states have call predecessors, (5892), 1920 states have return successors, (9092), 5700 states have call predecessors, (9092), 5892 states have call successors, (9092) [2022-12-14 11:44:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51465 states to 51465 states and 80460 transitions. [2022-12-14 11:44:12,085 INFO L78 Accepts]: Start accepts. Automaton has 51465 states and 80460 transitions. Word has length 136 [2022-12-14 11:44:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:12,086 INFO L495 AbstractCegarLoop]: Abstraction has 51465 states and 80460 transitions. [2022-12-14 11:44:12,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:44:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 51465 states and 80460 transitions. [2022-12-14 11:44:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 11:44:12,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:12,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:12,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:44:12,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7aeefd-9edc-48e0-8861-a5fe5477a5dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:12,337 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:12,337 INFO L85 PathProgramCache]: Analyzing trace with hash 276358694, now seen corresponding path program 1 times [2022-12-14 11:44:12,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:12,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035303537] [2022-12-14 11:44:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 11:44:12,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:12,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035303537] [2022-12-14 11:44:12,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035303537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:44:12,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:44:12,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:44:12,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777127021] [2022-12-14 11:44:12,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:44:12,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:44:12,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:44:12,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:44:12,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:12,730 INFO L87 Difference]: Start difference. First operand 51465 states and 80460 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:44:16,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:16,657 INFO L93 Difference]: Finished difference Result 133069 states and 208334 transitions. [2022-12-14 11:44:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:44:16,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2022-12-14 11:44:16,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:16,880 INFO L225 Difference]: With dead ends: 133069 [2022-12-14 11:44:16,881 INFO L226 Difference]: Without dead ends: 81611 [2022-12-14 11:44:16,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:44:16,974 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 789 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:16,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 747 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:44:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81611 states. [2022-12-14 11:44:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81611 to 81609. [2022-12-14 11:44:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81609 states, 69188 states have (on average 1.4939584899115455) internal successors, (103364), 69509 states have internal predecessors, (103364), 9348 states have call successors, (9348), 3072 states have call predecessors, (9348), 3072 states have return successors, (14852), 9028 states have call predecessors, (14852), 9348 states have call successors, (14852) [2022-12-14 11:44:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81609 states to 81609 states and 127564 transitions. [2022-12-14 11:44:21,549 INFO L78 Accepts]: Start accepts. Automaton has 81609 states and 127564 transitions. Word has length 136 [2022-12-14 11:44:21,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:21,550 INFO L495 AbstractCegarLoop]: Abstraction has 81609 states and 127564 transitions. [2022-12-14 11:44:21,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:44:21,550 INFO L276 IsEmpty]: Start isEmpty. Operand 81609 states and 127564 transitions. [2022-12-14 11:44:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 11:44:21,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:21,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 11:44:21,603 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1485998179, now seen corresponding path program 1 times [2022-12-14 11:44:21,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:21,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833837102] [2022-12-14 11:44:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 11:44:21,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:21,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833837102] [2022-12-14 11:44:21,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833837102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:44:21,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:44:21,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:44:21,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003798104] [2022-12-14 11:44:21,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:44:21,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:44:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:44:21,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:44:21,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:21,893 INFO L87 Difference]: Start difference. First operand 81609 states and 127564 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:44:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:31,782 INFO L93 Difference]: Finished difference Result 282701 states and 445519 transitions. [2022-12-14 11:44:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:44:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-12-14 11:44:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:32,448 INFO L225 Difference]: With dead ends: 282701 [2022-12-14 11:44:32,448 INFO L226 Difference]: Without dead ends: 201099 [2022-12-14 11:44:32,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:44:32,637 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1093 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:32,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 715 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:44:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201099 states. [2022-12-14 11:44:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201099 to 160137. [2022-12-14 11:44:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160137 states, 135812 states have (on average 1.4882042823903632) internal successors, (202116), 136453 states have internal predecessors, (202116), 18180 states have call successors, (18180), 6144 states have call predecessors, (18180), 6144 states have return successors, (28740), 17540 states have call predecessors, (28740), 18180 states have call successors, (28740) [2022-12-14 11:44:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160137 states to 160137 states and 249036 transitions. [2022-12-14 11:44:42,254 INFO L78 Accepts]: Start accepts. Automaton has 160137 states and 249036 transitions. Word has length 137 [2022-12-14 11:44:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:42,254 INFO L495 AbstractCegarLoop]: Abstraction has 160137 states and 249036 transitions. [2022-12-14 11:44:42,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:44:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 160137 states and 249036 transitions. [2022-12-14 11:44:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 11:44:42,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:42,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:42,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 11:44:42,362 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:42,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:42,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1817403518, now seen corresponding path program 1 times [2022-12-14 11:44:42,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:42,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255155007] [2022-12-14 11:44:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:42,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 11:44:42,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:42,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255155007] [2022-12-14 11:44:42,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255155007] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:44:42,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:44:42,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:44:42,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605100929] [2022-12-14 11:44:42,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:44:42,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:44:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:44:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:44:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:44:42,657 INFO L87 Difference]: Start difference. First operand 160137 states and 249036 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:44:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:58,820 INFO L93 Difference]: Finished difference Result 435661 states and 683086 transitions. [2022-12-14 11:44:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:44:58,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 138 [2022-12-14 11:44:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:59,779 INFO L225 Difference]: With dead ends: 435661 [2022-12-14 11:44:59,779 INFO L226 Difference]: Without dead ends: 275531 [2022-12-14 11:45:00,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:45:00,132 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 918 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:45:00,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 934 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:45:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275531 states. [2022-12-14 11:45:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275531 to 238153. [2022-12-14 11:45:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238153 states, 201924 states have (on average 1.4836671222836315) internal successors, (299588), 202885 states have internal predecessors, (299588), 27012 states have call successors, (27012), 9216 states have call predecessors, (27012), 9216 states have return successors, (42628), 26052 states have call predecessors, (42628), 27012 states have call successors, (42628) [2022-12-14 11:45:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238153 states to 238153 states and 369228 transitions. [2022-12-14 11:45:15,968 INFO L78 Accepts]: Start accepts. Automaton has 238153 states and 369228 transitions. Word has length 138 [2022-12-14 11:45:15,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:45:15,968 INFO L495 AbstractCegarLoop]: Abstraction has 238153 states and 369228 transitions. [2022-12-14 11:45:15,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:45:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 238153 states and 369228 transitions. [2022-12-14 11:45:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 11:45:16,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:45:16,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:45:16,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 11:45:16,113 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:45:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:45:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash 190294593, now seen corresponding path program 1 times [2022-12-14 11:45:16,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:45:16,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818606265] [2022-12-14 11:45:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:45:16,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:45:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:45:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 11:45:16,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:45:16,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818606265] [2022-12-14 11:45:16,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818606265] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:45:16,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:45:16,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:45:16,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293801092] [2022-12-14 11:45:16,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:45:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:45:16,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:45:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:45:16,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:45:16,504 INFO L87 Difference]: Start difference. First operand 238153 states and 369228 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:45:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:45:43,753 INFO L93 Difference]: Finished difference Result 642989 states and 1006670 transitions. [2022-12-14 11:45:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:45:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 139 [2022-12-14 11:45:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:45:45,301 INFO L225 Difference]: With dead ends: 642989 [2022-12-14 11:45:45,301 INFO L226 Difference]: Without dead ends: 404843 [2022-12-14 11:45:45,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:45:45,906 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 901 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:45:45,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 919 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:45:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404843 states. [2022-12-14 11:46:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404843 to 354153. [2022-12-14 11:46:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354153 states, 300196 states have (on average 1.4790470226118935) internal successors, (444004), 301637 states have internal predecessors, (444004), 40132 states have call successors, (40132), 13824 states have call predecessors, (40132), 13824 states have return successors, (63220), 38692 states have call predecessors, (63220), 40132 states have call successors, (63220) [2022-12-14 11:46:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354153 states to 354153 states and 547356 transitions. [2022-12-14 11:46:11,876 INFO L78 Accepts]: Start accepts. Automaton has 354153 states and 547356 transitions. Word has length 139 [2022-12-14 11:46:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:11,876 INFO L495 AbstractCegarLoop]: Abstraction has 354153 states and 547356 transitions. [2022-12-14 11:46:11,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:46:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 354153 states and 547356 transitions. [2022-12-14 11:46:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 11:46:12,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:12,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:12,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 11:46:12,090 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:12,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:12,090 INFO L85 PathProgramCache]: Analyzing trace with hash 340259038, now seen corresponding path program 1 times [2022-12-14 11:46:12,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:12,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117104194] [2022-12-14 11:46:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:12,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 11:46:12,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:12,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117104194] [2022-12-14 11:46:12,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117104194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:12,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:12,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:46:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77964654] [2022-12-14 11:46:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:12,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:46:12,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:46:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:46:12,452 INFO L87 Difference]: Start difference. First operand 354153 states and 547356 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:47:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:12,110 INFO L93 Difference]: Finished difference Result 1182253 states and 1852143 transitions. [2022-12-14 11:47:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:47:12,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 140 [2022-12-14 11:47:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:15,897 INFO L225 Difference]: With dead ends: 1182253 [2022-12-14 11:47:15,897 INFO L226 Difference]: Without dead ends: 828107 [2022-12-14 11:47:17,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:47:17,030 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 1005 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:17,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 668 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:47:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828107 states. [2022-12-14 11:48:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828107 to 694473. [2022-12-14 11:48:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694473 states, 588868 states have (on average 1.472771486988595) internal successors, (867268), 591749 states have internal predecessors, (867268), 77956 states have call successors, (77956), 27648 states have call predecessors, (77956), 27648 states have return successors, (122116), 75076 states have call predecessors, (122116), 77956 states have call successors, (122116) [2022-12-14 11:48:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694473 states to 694473 states and 1067340 transitions. [2022-12-14 11:48:14,367 INFO L78 Accepts]: Start accepts. Automaton has 694473 states and 1067340 transitions. Word has length 140 [2022-12-14 11:48:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:14,367 INFO L495 AbstractCegarLoop]: Abstraction has 694473 states and 1067340 transitions. [2022-12-14 11:48:14,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:48:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 694473 states and 1067340 transitions. [2022-12-14 11:48:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 11:48:15,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:15,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:15,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 11:48:15,149 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:48:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1031576347, now seen corresponding path program 1 times [2022-12-14 11:48:15,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:15,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410103881] [2022-12-14 11:48:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:15,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 11:48:15,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:48:15,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410103881] [2022-12-14 11:48:15,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410103881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:48:15,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:48:15,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:48:15,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002303677] [2022-12-14 11:48:15,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:48:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:48:15,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:48:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:48:15,619 INFO L87 Difference]: Start difference. First operand 694473 states and 1067340 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:49:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:51,591 INFO L93 Difference]: Finished difference Result 1844461 states and 2867918 transitions. [2022-12-14 11:49:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:49:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 141 [2022-12-14 11:49:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:56,964 INFO L225 Difference]: With dead ends: 1844461 [2022-12-14 11:49:56,965 INFO L226 Difference]: Without dead ends: 1149995 [2022-12-14 11:49:59,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:49:59,421 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 867 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:59,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 889 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:50:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149995 states. [2022-12-14 11:51:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149995 to 1032489. [2022-12-14 11:51:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032489 states, 875236 states have (on average 1.467914939513457) internal successors, (1284772), 879557 states have internal predecessors, (1284772), 115780 states have call successors, (115780), 41472 states have call predecessors, (115780), 41472 states have return successors, (181012), 111460 states have call predecessors, (181012), 115780 states have call successors, (181012) [2022-12-14 11:51:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032489 states to 1032489 states and 1581564 transitions. [2022-12-14 11:51:30,271 INFO L78 Accepts]: Start accepts. Automaton has 1032489 states and 1581564 transitions. Word has length 141 [2022-12-14 11:51:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:51:30,271 INFO L495 AbstractCegarLoop]: Abstraction has 1032489 states and 1581564 transitions. [2022-12-14 11:51:30,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:51:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1032489 states and 1581564 transitions. [2022-12-14 11:51:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 11:51:31,132 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:51:31,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:51:31,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 11:51:31,133 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:51:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:51:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1495754182, now seen corresponding path program 1 times [2022-12-14 11:51:31,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:51:31,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400274172] [2022-12-14 11:51:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:31,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:51:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 11:51:31,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:51:31,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400274172] [2022-12-14 11:51:31,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400274172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:51:31,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:51:31,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:51:31,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180503628] [2022-12-14 11:51:31,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:51:31,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:51:31,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:51:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:51:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:51:31,475 INFO L87 Difference]: Start difference. First operand 1032489 states and 1581564 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)