./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/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_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/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_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/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 d2ba51bdecedc8a39a24625eeb8da910bb1c988071a15f12bed2cd804a9146c3 --- 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 12:31:10,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:31:10,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:31:10,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:31:10,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:31:10,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:31:10,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:31:10,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:31:10,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:31:10,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:31:10,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:31:10,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:31:10,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:31:10,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:31:10,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:31:10,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:31:10,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:31:10,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:31:10,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:31:10,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:31:10,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:31:10,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:31:10,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:31:10,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:31:10,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:31:10,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:31:10,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:31:10,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:31:10,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:31:10,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:31:10,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:31:10,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:31:10,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:31:10,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:31:10,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:31:10,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:31:10,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:31:10,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:31:10,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:31:10,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:31:10,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:31:10,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:31:10,353 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:31:10,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:31:10,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:31:10,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:31:10,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:31:10,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:31:10,354 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:31:10,355 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:31:10,355 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:31:10,355 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:31:10,355 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:31:10,355 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:31:10,355 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:31:10,356 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:31:10,356 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:31:10,356 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:31:10,356 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:31:10,356 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:31:10,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:31:10,357 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:31:10,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:31:10,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:31:10,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:31:10,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:31:10,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:31:10,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:31:10,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:31:10,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:31:10,358 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:31:10,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:31:10,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:31:10,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:31:10,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:31:10,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:31:10,359 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:31:10,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:31:10,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:31:10,360 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:31:10,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:31:10,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:31:10,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:31:10,360 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_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ba51bdecedc8a39a24625eeb8da910bb1c988071a15f12bed2cd804a9146c3 [2022-12-14 12:31:10,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:31:10,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:31:10,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:31:10,544 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:31:10,545 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:31:10,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 12:31:13,215 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:31:13,392 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:31:13,393 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 12:31:13,399 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/data/5e31e6e23/890ea535bd814ce6aafe09f345317286/FLAG9ffd2f1c5 [2022-12-14 12:31:13,410 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/data/5e31e6e23/890ea535bd814ce6aafe09f345317286 [2022-12-14 12:31:13,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:31:13,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:31:13,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:31:13,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:31:13,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:31:13,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14819d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13, skipping insertion in model container [2022-12-14 12:31:13,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:31:13,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:31:13,631 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_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6638,6651] [2022-12-14 12:31:13,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:31:13,681 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:31:13,724 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_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6638,6651] [2022-12-14 12:31:13,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:31:13,761 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:31:13,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13 WrapperNode [2022-12-14 12:31:13,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:31:13,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:31:13,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:31:13,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:31:13,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,803 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 516 [2022-12-14 12:31:13,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:31:13,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:31:13,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:31:13,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:31:13,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,826 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:31:13,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:31:13,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:31:13,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:31:13,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (1/1) ... [2022-12-14 12:31:13,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:31:13,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:13,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:31:13,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:31:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:31:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:31:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:31:13,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:31:13,972 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:31:13,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:31:14,345 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:31:14,479 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:31:14,479 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 12:31:14,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:31:14 BoogieIcfgContainer [2022-12-14 12:31:14,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:31:14,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:31:14,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:31:14,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:31:14,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:31:13" (1/3) ... [2022-12-14 12:31:14,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2ab3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:31:14, skipping insertion in model container [2022-12-14 12:31:14,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:13" (2/3) ... [2022-12-14 12:31:14,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2ab3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:31:14, skipping insertion in model container [2022-12-14 12:31:14,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:31:14" (3/3) ... [2022-12-14 12:31:14,491 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 12:31:14,509 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:31:14,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:31:14,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:31:14,566 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;@1e4c3501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:31:14,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:31:14,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 84 states have (on average 1.7619047619047619) internal successors, (148), 86 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 12:31:14,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:14,580 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] [2022-12-14 12:31:14,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1137873299, now seen corresponding path program 1 times [2022-12-14 12:31:14,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:14,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249910108] [2022-12-14 12:31:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:14,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:15,004 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 12:31:15,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249910108] [2022-12-14 12:31:15,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249910108] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:15,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:15,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:31:15,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890039010] [2022-12-14 12:31:15,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:15,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:31:15,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:31:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:31:15,032 INFO L87 Difference]: Start difference. First operand has 87 states, 84 states have (on average 1.7619047619047619) internal successors, (148), 86 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:15,176 INFO L93 Difference]: Finished difference Result 142 states and 229 transitions. [2022-12-14 12:31:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:31:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-12-14 12:31:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:15,187 INFO L225 Difference]: With dead ends: 142 [2022-12-14 12:31:15,187 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 12:31:15,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:31:15,193 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 357 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:15,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 125 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 12:31:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 12:31:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.216867469879518) internal successors, (101), 83 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2022-12-14 12:31:15,230 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 52 [2022-12-14 12:31:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:15,230 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2022-12-14 12:31:15,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2022-12-14 12:31:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 12:31:15,232 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:15,232 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] [2022-12-14 12:31:15,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:31:15,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:15,233 INFO L85 PathProgramCache]: Analyzing trace with hash -401051278, now seen corresponding path program 1 times [2022-12-14 12:31:15,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:15,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237061143] [2022-12-14 12:31:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:15,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:15,387 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 12:31:15,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:15,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237061143] [2022-12-14 12:31:15,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237061143] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:15,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:15,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:31:15,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461075180] [2022-12-14 12:31:15,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:15,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:31:15,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:31:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:31:15,391 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:15,468 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2022-12-14 12:31:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:31:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-12-14 12:31:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:15,469 INFO L225 Difference]: With dead ends: 128 [2022-12-14 12:31:15,469 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 12:31:15,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:31:15,471 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 229 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:15,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 79 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 12:31:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 12:31:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2022-12-14 12:31:15,479 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 53 [2022-12-14 12:31:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:15,479 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2022-12-14 12:31:15,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2022-12-14 12:31:15,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:31:15,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:15,480 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] [2022-12-14 12:31:15,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:31:15,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:15,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1101764865, now seen corresponding path program 1 times [2022-12-14 12:31:15,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:15,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567294299] [2022-12-14 12:31:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:15,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:15,568 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 12:31:15,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567294299] [2022-12-14 12:31:15,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567294299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:15,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:15,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:31:15,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349187835] [2022-12-14 12:31:15,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:15,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:31:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:15,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:31:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:31:15,571 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:15,643 INFO L93 Difference]: Finished difference Result 136 states and 164 transitions. [2022-12-14 12:31:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:31:15,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 12:31:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:15,644 INFO L225 Difference]: With dead ends: 136 [2022-12-14 12:31:15,644 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 12:31:15,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:31:15,646 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 246 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:15,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 63 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 12:31:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 12:31:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 83 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2022-12-14 12:31:15,658 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 54 [2022-12-14 12:31:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:15,658 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2022-12-14 12:31:15,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2022-12-14 12:31:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 12:31:15,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:15,659 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] [2022-12-14 12:31:15,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:31:15,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash -841056326, now seen corresponding path program 1 times [2022-12-14 12:31:15,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:15,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755806415] [2022-12-14 12:31:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:15,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:15,756 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 12:31:15,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:15,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755806415] [2022-12-14 12:31:15,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755806415] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:15,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:15,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:31:15,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591546884] [2022-12-14 12:31:15,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:15,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:31:15,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:31:15,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:31:15,759 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:15,838 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2022-12-14 12:31:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:31:15,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-14 12:31:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:15,839 INFO L225 Difference]: With dead ends: 140 [2022-12-14 12:31:15,839 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 12:31:15,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:31:15,841 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 207 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:15,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 78 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 12:31:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 12:31:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2022-12-14 12:31:15,852 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 55 [2022-12-14 12:31:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:15,852 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2022-12-14 12:31:15,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2022-12-14 12:31:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 12:31:15,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:15,853 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] [2022-12-14 12:31:15,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:31:15,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1482520939, now seen corresponding path program 1 times [2022-12-14 12:31:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:15,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037788145] [2022-12-14 12:31:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:19,543 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 12:31:19,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037788145] [2022-12-14 12:31:19,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037788145] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:19,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:19,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-12-14 12:31:19,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216381925] [2022-12-14 12:31:19,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:19,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 12:31:19,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 12:31:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-12-14 12:31:19,546 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:23,640 INFO L93 Difference]: Finished difference Result 210 states and 266 transitions. [2022-12-14 12:31:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 12:31:23,641 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-14 12:31:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:23,642 INFO L225 Difference]: With dead ends: 210 [2022-12-14 12:31:23,643 INFO L226 Difference]: Without dead ends: 177 [2022-12-14 12:31:23,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=516, Invalid=1554, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 12:31:23,644 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 498 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:23,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 622 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 12:31:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-12-14 12:31:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 112. [2022-12-14 12:31:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 111 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2022-12-14 12:31:23,659 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 56 [2022-12-14 12:31:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:23,659 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2022-12-14 12:31:23,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2022-12-14 12:31:23,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 12:31:23,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:23,660 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] [2022-12-14 12:31:23,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:31:23,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:23,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:23,661 INFO L85 PathProgramCache]: Analyzing trace with hash 47632176, now seen corresponding path program 1 times [2022-12-14 12:31:23,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:23,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290816526] [2022-12-14 12:31:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:23,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:23,695 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 12:31:23,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:23,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290816526] [2022-12-14 12:31:23,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290816526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:23,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:23,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:31:23,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249279928] [2022-12-14 12:31:23,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:23,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:31:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:31:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:23,697 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:23,741 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2022-12-14 12:31:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:31:23,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-14 12:31:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:23,742 INFO L225 Difference]: With dead ends: 174 [2022-12-14 12:31:23,742 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 12:31:23,742 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 12:31:23,743 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:23,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 168 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 12:31:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-12-14 12:31:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 111 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-12-14 12:31:23,762 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 58 [2022-12-14 12:31:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:23,763 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-12-14 12:31:23,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-12-14 12:31:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 12:31:23,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:23,764 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] [2022-12-14 12:31:23,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:31:23,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash 220211439, now seen corresponding path program 1 times [2022-12-14 12:31:23,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:23,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258614659] [2022-12-14 12:31:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:23,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:27,376 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 12:31:27,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:27,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258614659] [2022-12-14 12:31:27,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258614659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:27,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:27,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-12-14 12:31:27,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849325838] [2022-12-14 12:31:27,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:27,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 12:31:27,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 12:31:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:31:27,378 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:31,641 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2022-12-14 12:31:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 12:31:31,641 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-14 12:31:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:31,642 INFO L225 Difference]: With dead ends: 206 [2022-12-14 12:31:31,642 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 12:31:31,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=754, Invalid=2216, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 12:31:31,643 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 348 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:31,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 881 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:31:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 12:31:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2022-12-14 12:31:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2253521126760563) internal successors, (174), 142 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 174 transitions. [2022-12-14 12:31:31,661 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 174 transitions. Word has length 58 [2022-12-14 12:31:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:31,661 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 174 transitions. [2022-12-14 12:31:31,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 174 transitions. [2022-12-14 12:31:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 12:31:31,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:31,662 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] [2022-12-14 12:31:31,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:31:31,662 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1765289309, now seen corresponding path program 1 times [2022-12-14 12:31:31,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:31,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021477584] [2022-12-14 12:31:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:31,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:31,770 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 12:31:31,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021477584] [2022-12-14 12:31:31,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021477584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:31,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:31,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:31:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230747242] [2022-12-14 12:31:31,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:31,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:31:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:31:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:31:31,773 INFO L87 Difference]: Start difference. First operand 143 states and 174 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:31,860 INFO L93 Difference]: Finished difference Result 206 states and 254 transitions. [2022-12-14 12:31:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:31:31,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-14 12:31:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:31,861 INFO L225 Difference]: With dead ends: 206 [2022-12-14 12:31:31,862 INFO L226 Difference]: Without dead ends: 204 [2022-12-14 12:31:31,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:31:31,862 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 76 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:31,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 342 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-12-14 12:31:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 145. [2022-12-14 12:31:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 144 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2022-12-14 12:31:31,883 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 59 [2022-12-14 12:31:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:31,883 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2022-12-14 12:31:31,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2022-12-14 12:31:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 12:31:31,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:31,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:31,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:31:31,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:31,885 INFO L85 PathProgramCache]: Analyzing trace with hash -232384608, now seen corresponding path program 1 times [2022-12-14 12:31:31,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:31,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664228526] [2022-12-14 12:31:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:31,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:31,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:31,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664228526] [2022-12-14 12:31:31,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664228526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:31,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:31,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:31:31,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559110282] [2022-12-14 12:31:31,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:31,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:31:31,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:31,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:31:31,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:31,957 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:32,025 INFO L93 Difference]: Finished difference Result 262 states and 331 transitions. [2022-12-14 12:31:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:31:32,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 12:31:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:32,026 INFO L225 Difference]: With dead ends: 262 [2022-12-14 12:31:32,026 INFO L226 Difference]: Without dead ends: 199 [2022-12-14 12:31:32,026 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 12:31:32,027 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 35 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:32,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 191 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-12-14 12:31:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 185. [2022-12-14 12:31:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.2228260869565217) internal successors, (225), 184 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2022-12-14 12:31:32,056 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 71 [2022-12-14 12:31:32,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:32,056 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2022-12-14 12:31:32,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,056 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2022-12-14 12:31:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 12:31:32,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:32,057 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:32,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:31:32,057 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:32,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1355768314, now seen corresponding path program 1 times [2022-12-14 12:31:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:32,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760307027] [2022-12-14 12:31:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:32,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:32,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760307027] [2022-12-14 12:31:32,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760307027] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:32,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:32,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:31:32,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430707578] [2022-12-14 12:31:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:32,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:31:32,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:31:32,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:32,124 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:32,210 INFO L93 Difference]: Finished difference Result 370 states and 472 transitions. [2022-12-14 12:31:32,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:31:32,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-12-14 12:31:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:32,211 INFO L225 Difference]: With dead ends: 370 [2022-12-14 12:31:32,212 INFO L226 Difference]: Without dead ends: 275 [2022-12-14 12:31:32,212 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 12:31:32,212 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 30 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:32,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 185 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-14 12:31:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-12-14 12:31:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.25390625) internal successors, (321), 256 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 321 transitions. [2022-12-14 12:31:32,249 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 321 transitions. Word has length 74 [2022-12-14 12:31:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:32,249 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 321 transitions. [2022-12-14 12:31:32,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 321 transitions. [2022-12-14 12:31:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 12:31:32,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:32,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:32,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 12:31:32,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:32,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:32,250 INFO L85 PathProgramCache]: Analyzing trace with hash -33612354, now seen corresponding path program 1 times [2022-12-14 12:31:32,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:32,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730572138] [2022-12-14 12:31:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:32,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:32,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:32,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730572138] [2022-12-14 12:31:32,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730572138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:32,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:32,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:31:32,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825015206] [2022-12-14 12:31:32,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:32,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:31:32,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:32,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:31:32,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:32,330 INFO L87 Difference]: Start difference. First operand 257 states and 321 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:32,449 INFO L93 Difference]: Finished difference Result 580 states and 751 transitions. [2022-12-14 12:31:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:31:32,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-12-14 12:31:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:32,451 INFO L225 Difference]: With dead ends: 580 [2022-12-14 12:31:32,451 INFO L226 Difference]: Without dead ends: 419 [2022-12-14 12:31:32,452 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 12:31:32,452 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 25 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:32,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 178 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-12-14 12:31:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 393. [2022-12-14 12:31:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.2755102040816326) internal successors, (500), 392 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 500 transitions. [2022-12-14 12:31:32,529 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 500 transitions. Word has length 77 [2022-12-14 12:31:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:32,529 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 500 transitions. [2022-12-14 12:31:32,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 500 transitions. [2022-12-14 12:31:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 12:31:32,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:32,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:32,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:31:32,530 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:32,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1824876932, now seen corresponding path program 1 times [2022-12-14 12:31:32,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:32,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749575443] [2022-12-14 12:31:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:32,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:32,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:32,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749575443] [2022-12-14 12:31:32,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749575443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:32,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:32,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:31:32,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477591509] [2022-12-14 12:31:32,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:32,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:31:32,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:31:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:32,624 INFO L87 Difference]: Start difference. First operand 393 states and 500 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:32,762 INFO L93 Difference]: Finished difference Result 982 states and 1282 transitions. [2022-12-14 12:31:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:31:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-12-14 12:31:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:32,764 INFO L225 Difference]: With dead ends: 982 [2022-12-14 12:31:32,764 INFO L226 Difference]: Without dead ends: 691 [2022-12-14 12:31:32,765 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 12:31:32,765 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 20 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:32,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 167 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-12-14 12:31:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 649. [2022-12-14 12:31:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.2885802469135803) internal successors, (835), 648 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 835 transitions. [2022-12-14 12:31:32,852 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 835 transitions. Word has length 80 [2022-12-14 12:31:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:32,852 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 835 transitions. [2022-12-14 12:31:32,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 835 transitions. [2022-12-14 12:31:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 12:31:32,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:32,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:32,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 12:31:32,853 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1762916294, now seen corresponding path program 1 times [2022-12-14 12:31:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:32,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676088154] [2022-12-14 12:31:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:32,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:31:32,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676088154] [2022-12-14 12:31:32,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676088154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:32,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:32,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:31:32,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288860003] [2022-12-14 12:31:32,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:32,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:31:32,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:31:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:31:32,999 INFO L87 Difference]: Start difference. First operand 649 states and 835 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:33,191 INFO L93 Difference]: Finished difference Result 1237 states and 1607 transitions. [2022-12-14 12:31:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:31:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-12-14 12:31:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:33,193 INFO L225 Difference]: With dead ends: 1237 [2022-12-14 12:31:33,193 INFO L226 Difference]: Without dead ends: 649 [2022-12-14 12:31:33,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:31:33,194 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 216 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:33,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 79 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-12-14 12:31:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 649. [2022-12-14 12:31:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.2608024691358024) internal successors, (817), 648 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 817 transitions. [2022-12-14 12:31:33,287 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 817 transitions. Word has length 98 [2022-12-14 12:31:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:33,287 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 817 transitions. [2022-12-14 12:31:33,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 817 transitions. [2022-12-14 12:31:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 12:31:33,288 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:33,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:33,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 12:31:33,288 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:33,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:33,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1410220875, now seen corresponding path program 1 times [2022-12-14 12:31:33,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:33,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840685733] [2022-12-14 12:31:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:33,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:31,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:31,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840685733] [2022-12-14 12:32:31,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840685733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:32:31,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144982339] [2022-12-14 12:32:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:31,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:32:31,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:32:31,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:32:31,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d8c25c-4a4f-4d5d-9bfe-f7d73b857c69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:32:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:31,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-14 12:32:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:43:10,988 WARN L233 SmtUtils]: Spent 9.48m on a formula simplification. DAG size of input: 173 DAG size of output: 173 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)