./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.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_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/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_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/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_4daba36d-f628-4a3a-acef-f604fd491c21/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 c39b660f273ecbdfa60a013e46dad0637949d26902d1f41ae3834ad8e3310564 --- 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 15:16:04,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:16:04,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:16:04,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:16:04,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:16:04,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:16:04,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:16:04,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:16:04,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:16:04,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:16:04,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:16:04,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:16:04,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:16:04,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:16:04,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:16:04,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:16:04,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:16:04,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:16:04,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:16:04,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:16:04,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:16:04,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:16:04,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:16:04,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:16:04,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:16:04,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:16:04,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:16:04,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:16:04,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:16:04,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:16:04,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:16:04,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:16:04,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:16:04,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:16:04,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:16:04,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:16:04,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:16:04,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:16:04,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:16:04,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:16:04,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:16:04,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:16:04,436 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:16:04,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:16:04,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:16:04,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:16:04,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:16:04,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:16:04,437 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:16:04,437 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:16:04,437 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:16:04,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:16:04,438 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:16:04,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:16:04,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:16:04,438 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:16:04,438 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:16:04,438 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:16:04,438 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:16:04,438 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:16:04,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:16:04,439 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:16:04,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:16:04,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:16:04,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:16:04,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:16:04,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:16:04,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:16:04,440 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:16:04,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:16:04,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:16:04,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:16:04,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:16:04,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:16:04,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:16:04,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:16:04,440 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:16:04,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:16:04,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:16:04,441 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:16:04,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:16:04,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:16:04,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:16:04,441 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_4daba36d-f628-4a3a-acef-f604fd491c21/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b660f273ecbdfa60a013e46dad0637949d26902d1f41ae3834ad8e3310564 [2022-12-14 15:16:04,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:16:04,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:16:04,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:16:04,666 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:16:04,666 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:16:04,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-12-14 15:16:07,292 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:16:07,455 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:16:07,456 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-12-14 15:16:07,468 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/data/bb84c1b20/bc2a89b6795b4690b530e1e3ac122a06/FLAGe41a65e3e [2022-12-14 15:16:07,480 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/data/bb84c1b20/bc2a89b6795b4690b530e1e3ac122a06 [2022-12-14 15:16:07,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:16:07,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:16:07,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:16:07,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:16:07,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:16:07,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc5c967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07, skipping insertion in model container [2022-12-14 15:16:07,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:16:07,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:16:07,707 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_4daba36d-f628-4a3a-acef-f604fd491c21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7469,7482] [2022-12-14 15:16:07,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:16:07,763 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:16:07,805 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_4daba36d-f628-4a3a-acef-f604fd491c21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7469,7482] [2022-12-14 15:16:07,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:16:07,846 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:16:07,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07 WrapperNode [2022-12-14 15:16:07,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:16:07,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:16:07,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:16:07,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:16:07,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,896 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 610 [2022-12-14 15:16:07,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:16:07,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:16:07,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:16:07,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:16:07,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,924 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:16:07,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:16:07,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:16:07,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:16:07,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (1/1) ... [2022-12-14 15:16:07,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:16:07,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:16:07,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:16:07,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:16:07,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:16:07,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:16:07,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:16:07,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:16:08,082 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:16:08,084 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:16:08,504 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:16:08,639 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:16:08,639 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 15:16:08,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:16:08 BoogieIcfgContainer [2022-12-14 15:16:08,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:16:08,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:16:08,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:16:08,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:16:08,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:16:07" (1/3) ... [2022-12-14 15:16:08,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4827e5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:16:08, skipping insertion in model container [2022-12-14 15:16:08,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:16:07" (2/3) ... [2022-12-14 15:16:08,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4827e5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:16:08, skipping insertion in model container [2022-12-14 15:16:08,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:16:08" (3/3) ... [2022-12-14 15:16:08,648 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-12-14 15:16:08,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:16:08,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:16:08,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:16:08,703 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;@129cca45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:16:08,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:16:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 119 states have (on average 1.6890756302521008) internal successors, (201), 120 states have internal predecessors, (201), 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 15:16:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 15:16:08,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:08,712 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] [2022-12-14 15:16:08,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash -569731817, now seen corresponding path program 1 times [2022-12-14 15:16:08,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:08,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740657187] [2022-12-14 15:16:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:08,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:09,068 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 15:16:09,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:09,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740657187] [2022-12-14 15:16:09,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740657187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:09,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:09,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:16:09,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240087780] [2022-12-14 15:16:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:09,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:16:09,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:09,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:16:09,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:16:09,097 INFO L87 Difference]: Start difference. First operand has 121 states, 119 states have (on average 1.6890756302521008) internal successors, (201), 120 states have internal predecessors, (201), 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 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 15:16:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:09,312 INFO L93 Difference]: Finished difference Result 328 states and 524 transitions. [2022-12-14 15:16:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:16:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 43 [2022-12-14 15:16:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:09,324 INFO L225 Difference]: With dead ends: 328 [2022-12-14 15:16:09,324 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 15:16:09,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:16:09,331 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 354 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:09,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 692 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:16:09,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 15:16:09,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2022-12-14 15:16:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.3723849372384938) internal successors, (328), 239 states have internal predecessors, (328), 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 15:16:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 328 transitions. [2022-12-14 15:16:09,397 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 328 transitions. Word has length 43 [2022-12-14 15:16:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:09,397 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 328 transitions. [2022-12-14 15:16:09,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 15:16:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 328 transitions. [2022-12-14 15:16:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 15:16:09,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:09,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:09,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:16:09,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1859584073, now seen corresponding path program 1 times [2022-12-14 15:16:09,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:09,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266118754] [2022-12-14 15:16:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:09,538 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 15:16:09,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:09,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266118754] [2022-12-14 15:16:09,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266118754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:09,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:09,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:16:09,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143310914] [2022-12-14 15:16:09,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:09,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:16:09,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:16:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:16:09,542 INFO L87 Difference]: Start difference. First operand 240 states and 328 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 15:16:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:09,774 INFO L93 Difference]: Finished difference Result 531 states and 737 transitions. [2022-12-14 15:16:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:16:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2022-12-14 15:16:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:09,777 INFO L225 Difference]: With dead ends: 531 [2022-12-14 15:16:09,778 INFO L226 Difference]: Without dead ends: 318 [2022-12-14 15:16:09,779 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 15:16:09,780 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 418 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:09,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 167 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:16:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-12-14 15:16:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2022-12-14 15:16:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.3746031746031746) internal successors, (433), 315 states have internal predecessors, (433), 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 15:16:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 433 transitions. [2022-12-14 15:16:09,822 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 433 transitions. Word has length 44 [2022-12-14 15:16:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:09,822 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 433 transitions. [2022-12-14 15:16:09,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 15:16:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 433 transitions. [2022-12-14 15:16:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 15:16:09,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:09,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:09,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:16:09,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1490531816, now seen corresponding path program 1 times [2022-12-14 15:16:09,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:09,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715797674] [2022-12-14 15:16:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:09,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:09,907 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 15:16:09,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:09,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715797674] [2022-12-14 15:16:09,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715797674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:09,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:09,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:16:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085871214] [2022-12-14 15:16:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:16:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:16:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:16:09,909 INFO L87 Difference]: Start difference. First operand 316 states and 433 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 15:16:10,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:10,109 INFO L93 Difference]: Finished difference Result 765 states and 1070 transitions. [2022-12-14 15:16:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:16:10,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2022-12-14 15:16:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:10,113 INFO L225 Difference]: With dead ends: 765 [2022-12-14 15:16:10,113 INFO L226 Difference]: Without dead ends: 492 [2022-12-14 15:16:10,114 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 15:16:10,115 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 397 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:10,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 178 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:16:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-12-14 15:16:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490. [2022-12-14 15:16:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.3865030674846626) internal successors, (678), 489 states have internal predecessors, (678), 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 15:16:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 678 transitions. [2022-12-14 15:16:10,155 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 678 transitions. Word has length 44 [2022-12-14 15:16:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:10,155 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 678 transitions. [2022-12-14 15:16:10,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 15:16:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 678 transitions. [2022-12-14 15:16:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 15:16:10,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:10,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:10,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:16:10,158 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:10,158 INFO L85 PathProgramCache]: Analyzing trace with hash -448842201, now seen corresponding path program 1 times [2022-12-14 15:16:10,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:10,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573228409] [2022-12-14 15:16:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:10,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:10,228 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 15:16:10,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573228409] [2022-12-14 15:16:10,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573228409] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:10,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:10,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:16:10,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436310970] [2022-12-14 15:16:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:10,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:16:10,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:16:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:16:10,230 INFO L87 Difference]: Start difference. First operand 490 states and 678 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 15:16:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:10,450 INFO L93 Difference]: Finished difference Result 1267 states and 1784 transitions. [2022-12-14 15:16:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:16:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2022-12-14 15:16:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:10,456 INFO L225 Difference]: With dead ends: 1267 [2022-12-14 15:16:10,457 INFO L226 Difference]: Without dead ends: 840 [2022-12-14 15:16:10,458 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 15:16:10,458 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 380 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:10,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 186 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:16:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-12-14 15:16:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2022-12-14 15:16:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.3954599761051374) internal successors, (1168), 837 states have internal predecessors, (1168), 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 15:16:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1168 transitions. [2022-12-14 15:16:10,527 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1168 transitions. Word has length 44 [2022-12-14 15:16:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:10,527 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1168 transitions. [2022-12-14 15:16:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 15:16:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1168 transitions. [2022-12-14 15:16:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:16:10,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:10,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:10,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:16:10,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:10,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1500601899, now seen corresponding path program 1 times [2022-12-14 15:16:10,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:10,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449326266] [2022-12-14 15:16:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:10,856 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 15:16:10,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:10,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449326266] [2022-12-14 15:16:10,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449326266] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:10,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:10,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 15:16:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886282415] [2022-12-14 15:16:10,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:16:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:16:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:16:10,858 INFO L87 Difference]: Start difference. First operand 838 states and 1168 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 15:16:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:11,756 INFO L93 Difference]: Finished difference Result 4663 states and 6639 transitions. [2022-12-14 15:16:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 15:16:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 45 [2022-12-14 15:16:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:11,766 INFO L225 Difference]: With dead ends: 4663 [2022-12-14 15:16:11,766 INFO L226 Difference]: Without dead ends: 3965 [2022-12-14 15:16:11,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:16:11,768 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1468 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:11,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1468 Valid, 691 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:16:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3965 states. [2022-12-14 15:16:12,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3965 to 2483. [2022-12-14 15:16:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 1.3924254633360194) internal successors, (3456), 2482 states have internal predecessors, (3456), 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 15:16:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3456 transitions. [2022-12-14 15:16:12,077 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3456 transitions. Word has length 45 [2022-12-14 15:16:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:12,077 INFO L495 AbstractCegarLoop]: Abstraction has 2483 states and 3456 transitions. [2022-12-14 15:16:12,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 15:16:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3456 transitions. [2022-12-14 15:16:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:16:12,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:12,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:12,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:16:12,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash 331686411, now seen corresponding path program 1 times [2022-12-14 15:16:12,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:12,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288652810] [2022-12-14 15:16:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:12,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:12,345 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 15:16:12,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:12,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288652810] [2022-12-14 15:16:12,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288652810] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:12,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:12,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 15:16:12,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147619492] [2022-12-14 15:16:12,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:12,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:16:12,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:16:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:16:12,346 INFO L87 Difference]: Start difference. First operand 2483 states and 3456 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 15:16:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:13,229 INFO L93 Difference]: Finished difference Result 4263 states and 5980 transitions. [2022-12-14 15:16:13,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:16:13,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 45 [2022-12-14 15:16:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:13,237 INFO L225 Difference]: With dead ends: 4263 [2022-12-14 15:16:13,237 INFO L226 Difference]: Without dead ends: 3787 [2022-12-14 15:16:13,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:16:13,239 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 1304 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:13,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 871 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:16:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2022-12-14 15:16:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3067. [2022-12-14 15:16:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 3066 states have (on average 1.3842139595564253) internal successors, (4244), 3066 states have internal predecessors, (4244), 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 15:16:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 4244 transitions. [2022-12-14 15:16:13,604 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 4244 transitions. Word has length 45 [2022-12-14 15:16:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:13,604 INFO L495 AbstractCegarLoop]: Abstraction has 3067 states and 4244 transitions. [2022-12-14 15:16:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 15:16:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 4244 transitions. [2022-12-14 15:16:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:16:13,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:13,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:13,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:16:13,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2052968981, now seen corresponding path program 1 times [2022-12-14 15:16:13,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:13,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392857934] [2022-12-14 15:16:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:13,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:13,937 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 15:16:13,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:13,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392857934] [2022-12-14 15:16:13,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392857934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:13,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:13,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 15:16:13,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896347814] [2022-12-14 15:16:13,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:13,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:16:13,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:16:13,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:16:13,940 INFO L87 Difference]: Start difference. First operand 3067 states and 4244 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 15:16:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:15,060 INFO L93 Difference]: Finished difference Result 4801 states and 6657 transitions. [2022-12-14 15:16:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:16:15,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 45 [2022-12-14 15:16:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:15,070 INFO L225 Difference]: With dead ends: 4801 [2022-12-14 15:16:15,070 INFO L226 Difference]: Without dead ends: 4639 [2022-12-14 15:16:15,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:16:15,072 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 1092 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:15,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1092 Valid, 1074 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:16:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2022-12-14 15:16:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 3520. [2022-12-14 15:16:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 1.3813583404376244) internal successors, (4861), 3519 states have internal predecessors, (4861), 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 15:16:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 4861 transitions. [2022-12-14 15:16:15,462 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 4861 transitions. Word has length 45 [2022-12-14 15:16:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:15,462 INFO L495 AbstractCegarLoop]: Abstraction has 3520 states and 4861 transitions. [2022-12-14 15:16:15,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 15:16:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 4861 transitions. [2022-12-14 15:16:15,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:16:15,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:15,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:15,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:16:15,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1352529439, now seen corresponding path program 1 times [2022-12-14 15:16:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:15,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859600968] [2022-12-14 15:16:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:15,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:15,771 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 15:16:15,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:15,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859600968] [2022-12-14 15:16:15,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859600968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:15,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:15,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 15:16:15,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309669077] [2022-12-14 15:16:15,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:15,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:16:15,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:15,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:16:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:16:15,774 INFO L87 Difference]: Start difference. First operand 3520 states and 4861 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 15:16:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:16,926 INFO L93 Difference]: Finished difference Result 8197 states and 11371 transitions. [2022-12-14 15:16:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 15:16:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 47 [2022-12-14 15:16:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:16,938 INFO L225 Difference]: With dead ends: 8197 [2022-12-14 15:16:16,939 INFO L226 Difference]: Without dead ends: 7271 [2022-12-14 15:16:16,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:16:16,941 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 576 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:16,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1100 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:16:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2022-12-14 15:16:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 4856. [2022-12-14 15:16:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4855 states have (on average 1.3857878475798147) internal successors, (6728), 4855 states have internal predecessors, (6728), 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 15:16:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 6728 transitions. [2022-12-14 15:16:17,536 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 6728 transitions. Word has length 47 [2022-12-14 15:16:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:17,536 INFO L495 AbstractCegarLoop]: Abstraction has 4856 states and 6728 transitions. [2022-12-14 15:16:17,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 15:16:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 6728 transitions. [2022-12-14 15:16:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:16:17,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:17,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:17,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:16:17,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:17,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1032125953, now seen corresponding path program 1 times [2022-12-14 15:16:17,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:17,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019897579] [2022-12-14 15:16:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:17,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:17,844 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 15:16:17,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:17,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019897579] [2022-12-14 15:16:17,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019897579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:17,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:17,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 15:16:17,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616006480] [2022-12-14 15:16:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:16:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:16:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:16:17,846 INFO L87 Difference]: Start difference. First operand 4856 states and 6728 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 15:16:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:19,231 INFO L93 Difference]: Finished difference Result 7344 states and 10176 transitions. [2022-12-14 15:16:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:16:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 47 [2022-12-14 15:16:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:19,254 INFO L225 Difference]: With dead ends: 7344 [2022-12-14 15:16:19,254 INFO L226 Difference]: Without dead ends: 6646 [2022-12-14 15:16:19,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-12-14 15:16:19,256 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 404 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:19,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 1024 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:16:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6646 states. [2022-12-14 15:16:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6646 to 4883. [2022-12-14 15:16:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4883 states, 4882 states have (on average 1.383654240065547) internal successors, (6755), 4882 states have internal predecessors, (6755), 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 15:16:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 6755 transitions. [2022-12-14 15:16:19,867 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 6755 transitions. Word has length 47 [2022-12-14 15:16:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:19,868 INFO L495 AbstractCegarLoop]: Abstraction has 4883 states and 6755 transitions. [2022-12-14 15:16:19,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 15:16:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 6755 transitions. [2022-12-14 15:16:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:16:19,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:19,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:19,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:16:19,869 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:19,869 INFO L85 PathProgramCache]: Analyzing trace with hash 921521631, now seen corresponding path program 1 times [2022-12-14 15:16:19,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:19,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379541881] [2022-12-14 15:16:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:19,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:20,122 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 15:16:20,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:20,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379541881] [2022-12-14 15:16:20,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379541881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:20,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:20,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 15:16:20,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967533628] [2022-12-14 15:16:20,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:20,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:16:20,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:20,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:16:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:16:20,124 INFO L87 Difference]: Start difference. First operand 4883 states and 6755 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 15:16:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:21,646 INFO L93 Difference]: Finished difference Result 8742 states and 12104 transitions. [2022-12-14 15:16:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:16:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 47 [2022-12-14 15:16:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:21,658 INFO L225 Difference]: With dead ends: 8742 [2022-12-14 15:16:21,658 INFO L226 Difference]: Without dead ends: 8588 [2022-12-14 15:16:21,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2022-12-14 15:16:21,660 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 512 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:21,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 1316 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:16:21,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8588 states. [2022-12-14 15:16:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8588 to 4886. [2022-12-14 15:16:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4886 states, 4885 states have (on average 1.3834186284544525) internal successors, (6758), 4885 states have internal predecessors, (6758), 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 15:16:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4886 states to 4886 states and 6758 transitions. [2022-12-14 15:16:22,220 INFO L78 Accepts]: Start accepts. Automaton has 4886 states and 6758 transitions. Word has length 47 [2022-12-14 15:16:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:22,220 INFO L495 AbstractCegarLoop]: Abstraction has 4886 states and 6758 transitions. [2022-12-14 15:16:22,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 15:16:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4886 states and 6758 transitions. [2022-12-14 15:16:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 15:16:22,221 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:22,221 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] [2022-12-14 15:16:22,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:16:22,221 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1395166925, now seen corresponding path program 1 times [2022-12-14 15:16:22,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:22,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255470606] [2022-12-14 15:16:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:22,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:22,241 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 15:16:22,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:22,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255470606] [2022-12-14 15:16:22,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255470606] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:22,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:22,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:16:22,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760845284] [2022-12-14 15:16:22,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:22,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:16:22,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:16:22,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:16:22,243 INFO L87 Difference]: Start difference. First operand 4886 states and 6758 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 15:16:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:22,823 INFO L93 Difference]: Finished difference Result 8711 states and 12117 transitions. [2022-12-14 15:16:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:16:22,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2022-12-14 15:16:22,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:22,829 INFO L225 Difference]: With dead ends: 8711 [2022-12-14 15:16:22,829 INFO L226 Difference]: Without dead ends: 4592 [2022-12-14 15:16:22,833 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 15:16:22,833 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 85 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:22,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 271 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:16:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4592 states. [2022-12-14 15:16:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4592 to 4588. [2022-12-14 15:16:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4587 states have (on average 1.381294964028777) internal successors, (6336), 4587 states have internal predecessors, (6336), 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 15:16:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 6336 transitions. [2022-12-14 15:16:23,452 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 6336 transitions. Word has length 48 [2022-12-14 15:16:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:23,452 INFO L495 AbstractCegarLoop]: Abstraction has 4588 states and 6336 transitions. [2022-12-14 15:16:23,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 15:16:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 6336 transitions. [2022-12-14 15:16:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 15:16:23,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:23,453 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] [2022-12-14 15:16:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 15:16:23,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1093497654, now seen corresponding path program 1 times [2022-12-14 15:16:23,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:23,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003196449] [2022-12-14 15:16:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:23,475 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 15:16:23,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:23,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003196449] [2022-12-14 15:16:23,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003196449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:23,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:23,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:16:23,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421576721] [2022-12-14 15:16:23,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:23,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:16:23,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:23,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:16:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:16:23,476 INFO L87 Difference]: Start difference. First operand 4588 states and 6336 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 15:16:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:24,143 INFO L93 Difference]: Finished difference Result 8127 states and 11277 transitions. [2022-12-14 15:16:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:16:24,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2022-12-14 15:16:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:24,148 INFO L225 Difference]: With dead ends: 8127 [2022-12-14 15:16:24,148 INFO L226 Difference]: Without dead ends: 4335 [2022-12-14 15:16:24,151 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 15:16:24,152 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 78 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:24,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 271 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:16:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2022-12-14 15:16:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 4241. [2022-12-14 15:16:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4241 states, 4240 states have (on average 1.3783018867924528) internal successors, (5844), 4240 states have internal predecessors, (5844), 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 15:16:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4241 states to 4241 states and 5844 transitions. [2022-12-14 15:16:24,653 INFO L78 Accepts]: Start accepts. Automaton has 4241 states and 5844 transitions. Word has length 48 [2022-12-14 15:16:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:24,653 INFO L495 AbstractCegarLoop]: Abstraction has 4241 states and 5844 transitions. [2022-12-14 15:16:24,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 15:16:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4241 states and 5844 transitions. [2022-12-14 15:16:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 15:16:24,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:24,654 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] [2022-12-14 15:16:24,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 15:16:24,654 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1595839245, now seen corresponding path program 1 times [2022-12-14 15:16:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:24,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260003693] [2022-12-14 15:16:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:24,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:26,563 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 15:16:26,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:26,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260003693] [2022-12-14 15:16:26,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260003693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:26,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:26,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-12-14 15:16:26,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915192087] [2022-12-14 15:16:26,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:26,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 15:16:26,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 15:16:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-14 15:16:26,565 INFO L87 Difference]: Start difference. First operand 4241 states and 5844 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 15:16:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:31,982 INFO L93 Difference]: Finished difference Result 6046 states and 8317 transitions. [2022-12-14 15:16:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 15:16:31,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 49 [2022-12-14 15:16:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:31,990 INFO L225 Difference]: With dead ends: 6046 [2022-12-14 15:16:31,990 INFO L226 Difference]: Without dead ends: 5900 [2022-12-14 15:16:31,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=570, Invalid=1592, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 15:16:31,993 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1064 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 2996 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:31,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 1775 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2996 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 15:16:31,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5900 states. [2022-12-14 15:16:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5900 to 4247. [2022-12-14 15:16:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4247 states, 4246 states have (on average 1.3780028261893547) internal successors, (5851), 4246 states have internal predecessors, (5851), 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 15:16:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 5851 transitions. [2022-12-14 15:16:32,581 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 5851 transitions. Word has length 49 [2022-12-14 15:16:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:32,581 INFO L495 AbstractCegarLoop]: Abstraction has 4247 states and 5851 transitions. [2022-12-14 15:16:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 15:16:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 5851 transitions. [2022-12-14 15:16:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 15:16:32,582 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:32,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:32,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 15:16:32,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:32,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:32,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1265773300, now seen corresponding path program 1 times [2022-12-14 15:16:32,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:32,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151816533] [2022-12-14 15:16:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:32,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:32,604 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 15:16:32,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:32,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151816533] [2022-12-14 15:16:32,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151816533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:32,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:32,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:16:32,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392469102] [2022-12-14 15:16:32,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:32,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:16:32,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:16:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:16:32,605 INFO L87 Difference]: Start difference. First operand 4247 states and 5851 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 15:16:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:33,362 INFO L93 Difference]: Finished difference Result 7056 states and 9747 transitions. [2022-12-14 15:16:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:16:33,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 50 [2022-12-14 15:16:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:33,369 INFO L225 Difference]: With dead ends: 7056 [2022-12-14 15:16:33,369 INFO L226 Difference]: Without dead ends: 4022 [2022-12-14 15:16:33,372 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 15:16:33,373 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 84 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:33,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 250 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:16:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2022-12-14 15:16:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 4020. [2022-12-14 15:16:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 4019 states have (on average 1.3749688977357553) internal successors, (5526), 4019 states have internal predecessors, (5526), 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 15:16:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5526 transitions. [2022-12-14 15:16:33,928 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5526 transitions. Word has length 50 [2022-12-14 15:16:33,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:33,928 INFO L495 AbstractCegarLoop]: Abstraction has 4020 states and 5526 transitions. [2022-12-14 15:16:33,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 15:16:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5526 transitions. [2022-12-14 15:16:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 15:16:33,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:33,929 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 15:16:33,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 15:16:33,930 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:33,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:33,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1911473133, now seen corresponding path program 1 times [2022-12-14 15:16:33,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:33,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429198509] [2022-12-14 15:16:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:33,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:34,015 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 15:16:34,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:34,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429198509] [2022-12-14 15:16:34,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429198509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:34,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:34,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:16:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556996578] [2022-12-14 15:16:34,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:34,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:16:34,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:16:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:16:34,017 INFO L87 Difference]: Start difference. First operand 4020 states and 5526 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 15:16:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:34,762 INFO L93 Difference]: Finished difference Result 7746 states and 10703 transitions. [2022-12-14 15:16:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:16:34,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 15:16:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:34,766 INFO L225 Difference]: With dead ends: 7746 [2022-12-14 15:16:34,766 INFO L226 Difference]: Without dead ends: 4931 [2022-12-14 15:16:34,769 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 15:16:34,769 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 81 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:34,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 296 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:16:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2022-12-14 15:16:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 4587. [2022-12-14 15:16:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4586 states have (on average 1.3658962058438726) internal successors, (6264), 4586 states have internal predecessors, (6264), 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 15:16:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 6264 transitions. [2022-12-14 15:16:35,398 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 6264 transitions. Word has length 55 [2022-12-14 15:16:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:35,398 INFO L495 AbstractCegarLoop]: Abstraction has 4587 states and 6264 transitions. [2022-12-14 15:16:35,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 15:16:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 6264 transitions. [2022-12-14 15:16:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 15:16:35,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:35,399 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 15:16:35,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 15:16:35,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash 663479602, now seen corresponding path program 1 times [2022-12-14 15:16:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:35,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413824080] [2022-12-14 15:16:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:35,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:35,429 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 15:16:35,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:35,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413824080] [2022-12-14 15:16:35,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413824080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:35,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:35,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:16:35,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109521957] [2022-12-14 15:16:35,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:35,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:16:35,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:35,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:16:35,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:16:35,431 INFO L87 Difference]: Start difference. First operand 4587 states and 6264 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 15:16:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:36,131 INFO L93 Difference]: Finished difference Result 7480 states and 10220 transitions. [2022-12-14 15:16:36,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:16:36,132 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 15:16:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:36,135 INFO L225 Difference]: With dead ends: 7480 [2022-12-14 15:16:36,136 INFO L226 Difference]: Without dead ends: 3910 [2022-12-14 15:16:36,139 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 15:16:36,139 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 73 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:36,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 302 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:16:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2022-12-14 15:16:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3908. [2022-12-14 15:16:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 1.3465574609674942) internal successors, (5261), 3907 states have internal predecessors, (5261), 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 15:16:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 5261 transitions. [2022-12-14 15:16:36,744 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 5261 transitions. Word has length 58 [2022-12-14 15:16:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:36,744 INFO L495 AbstractCegarLoop]: Abstraction has 3908 states and 5261 transitions. [2022-12-14 15:16:36,744 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 15:16:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 5261 transitions. [2022-12-14 15:16:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 15:16:36,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:36,745 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 15:16:36,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 15:16:36,745 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:36,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1631752878, now seen corresponding path program 1 times [2022-12-14 15:16:36,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:36,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30060144] [2022-12-14 15:16:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:36,804 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 15:16:36,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30060144] [2022-12-14 15:16:36,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30060144] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:36,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:36,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:16:36,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370448210] [2022-12-14 15:16:36,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:36,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:16:36,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:16:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:16:36,805 INFO L87 Difference]: Start difference. First operand 3908 states and 5261 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 15:16:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:37,679 INFO L93 Difference]: Finished difference Result 8560 states and 11601 transitions. [2022-12-14 15:16:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:16:37,680 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 15:16:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:37,685 INFO L225 Difference]: With dead ends: 8560 [2022-12-14 15:16:37,685 INFO L226 Difference]: Without dead ends: 5423 [2022-12-14 15:16:37,687 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 15:16:37,687 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 77 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:37,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 278 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:16:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5423 states. [2022-12-14 15:16:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5423 to 4863. [2022-12-14 15:16:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4862 states have (on average 1.332167832167832) internal successors, (6477), 4862 states have internal predecessors, (6477), 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 15:16:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 6477 transitions. [2022-12-14 15:16:38,453 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 6477 transitions. Word has length 58 [2022-12-14 15:16:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:38,453 INFO L495 AbstractCegarLoop]: Abstraction has 4863 states and 6477 transitions. [2022-12-14 15:16:38,453 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 15:16:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 6477 transitions. [2022-12-14 15:16:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 15:16:38,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:38,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:38,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 15:16:38,454 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash -540321193, now seen corresponding path program 1 times [2022-12-14 15:16:38,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:38,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630516621] [2022-12-14 15:16:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:38,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:38,483 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 15:16:38,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:38,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630516621] [2022-12-14 15:16:38,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630516621] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:38,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:38,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:16:38,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216304568] [2022-12-14 15:16:38,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:38,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:16:38,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:38,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:16:38,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:16:38,484 INFO L87 Difference]: Start difference. First operand 4863 states and 6477 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 15:16:39,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:39,437 INFO L93 Difference]: Finished difference Result 7206 states and 9601 transitions. [2022-12-14 15:16:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:16:39,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 61 [2022-12-14 15:16:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:39,442 INFO L225 Difference]: With dead ends: 7206 [2022-12-14 15:16:39,442 INFO L226 Difference]: Without dead ends: 5180 [2022-12-14 15:16:39,444 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 15:16:39,444 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 73 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:39,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 315 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:16:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5180 states. [2022-12-14 15:16:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5180 to 5178. [2022-12-14 15:16:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 1.3196832142167279) internal successors, (6832), 5177 states have internal predecessors, (6832), 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 15:16:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 6832 transitions. [2022-12-14 15:16:40,308 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 6832 transitions. Word has length 61 [2022-12-14 15:16:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:40,309 INFO L495 AbstractCegarLoop]: Abstraction has 5178 states and 6832 transitions. [2022-12-14 15:16:40,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 15:16:40,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 6832 transitions. [2022-12-14 15:16:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 15:16:40,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:40,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:40,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 15:16:40,310 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash -657152457, now seen corresponding path program 1 times [2022-12-14 15:16:40,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:40,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555247387] [2022-12-14 15:16:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:40,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:40,362 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 15:16:40,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:40,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555247387] [2022-12-14 15:16:40,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555247387] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:40,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:40,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:16:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364309451] [2022-12-14 15:16:40,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:40,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:16:40,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:16:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:16:40,364 INFO L87 Difference]: Start difference. First operand 5178 states and 6832 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 15:16:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:41,892 INFO L93 Difference]: Finished difference Result 12198 states and 16188 transitions. [2022-12-14 15:16:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:16:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 61 [2022-12-14 15:16:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:41,899 INFO L225 Difference]: With dead ends: 12198 [2022-12-14 15:16:41,899 INFO L226 Difference]: Without dead ends: 7410 [2022-12-14 15:16:41,902 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 15:16:41,903 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 72 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 259 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 15:16:41,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 259 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:16:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7410 states. [2022-12-14 15:16:43,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7410 to 6760. [2022-12-14 15:16:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 6759 states have (on average 1.3065542239976329) internal successors, (8831), 6759 states have internal predecessors, (8831), 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 15:16:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 8831 transitions. [2022-12-14 15:16:43,219 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 8831 transitions. Word has length 61 [2022-12-14 15:16:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:43,219 INFO L495 AbstractCegarLoop]: Abstraction has 6760 states and 8831 transitions. [2022-12-14 15:16:43,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 15:16:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 8831 transitions. [2022-12-14 15:16:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 15:16:43,220 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:43,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:43,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 15:16:43,220 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:43,220 INFO L85 PathProgramCache]: Analyzing trace with hash -59629605, now seen corresponding path program 1 times [2022-12-14 15:16:43,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:43,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333161313] [2022-12-14 15:16:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:43,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:43,370 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 15:16:43,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333161313] [2022-12-14 15:16:43,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333161313] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:43,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:43,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:16:43,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913468366] [2022-12-14 15:16:43,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:43,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:16:43,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:16:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:16:43,372 INFO L87 Difference]: Start difference. First operand 6760 states and 8831 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 15:16:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:45,244 INFO L93 Difference]: Finished difference Result 9279 states and 12089 transitions. [2022-12-14 15:16:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:16:45,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 66 [2022-12-14 15:16:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:45,252 INFO L225 Difference]: With dead ends: 9279 [2022-12-14 15:16:45,252 INFO L226 Difference]: Without dead ends: 9277 [2022-12-14 15:16:45,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:16:45,254 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 322 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:45,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 740 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:16:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9277 states. [2022-12-14 15:16:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9277 to 8135. [2022-12-14 15:16:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 8134 states have (on average 1.3026801081878534) internal successors, (10596), 8134 states have internal predecessors, (10596), 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 15:16:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 10596 transitions. [2022-12-14 15:16:47,092 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 10596 transitions. Word has length 66 [2022-12-14 15:16:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:47,092 INFO L495 AbstractCegarLoop]: Abstraction has 8135 states and 10596 transitions. [2022-12-14 15:16:47,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 15:16:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 10596 transitions. [2022-12-14 15:16:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 15:16:47,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:47,095 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:16:47,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 15:16:47,095 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1119321163, now seen corresponding path program 1 times [2022-12-14 15:16:47,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:47,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610468724] [2022-12-14 15:16:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:47,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:16:47,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:47,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610468724] [2022-12-14 15:16:47,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610468724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:47,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:16:47,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:16:47,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915438201] [2022-12-14 15:16:47,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:47,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:16:47,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:47,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:16:47,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:16:47,212 INFO L87 Difference]: Start difference. First operand 8135 states and 10596 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 15:16:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:49,985 INFO L93 Difference]: Finished difference Result 19668 states and 25697 transitions. [2022-12-14 15:16:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:16:49,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 76 [2022-12-14 15:16:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:49,996 INFO L225 Difference]: With dead ends: 19668 [2022-12-14 15:16:49,996 INFO L226 Difference]: Without dead ends: 12264 [2022-12-14 15:16:50,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:16:50,002 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 804 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:50,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 280 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:16:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12264 states. [2022-12-14 15:16:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12264 to 10460. [2022-12-14 15:16:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10460 states, 10459 states have (on average 1.284635242374988) internal successors, (13436), 10459 states have internal predecessors, (13436), 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 15:16:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10460 states to 10460 states and 13436 transitions. [2022-12-14 15:16:52,139 INFO L78 Accepts]: Start accepts. Automaton has 10460 states and 13436 transitions. Word has length 76 [2022-12-14 15:16:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:52,139 INFO L495 AbstractCegarLoop]: Abstraction has 10460 states and 13436 transitions. [2022-12-14 15:16:52,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 15:16:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 10460 states and 13436 transitions. [2022-12-14 15:16:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 15:16:52,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:52,142 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:16:52,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 15:16:52,142 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:52,142 INFO L85 PathProgramCache]: Analyzing trace with hash 498183728, now seen corresponding path program 1 times [2022-12-14 15:16:52,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:52,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424513240] [2022-12-14 15:16:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:52,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:16:53,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:53,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424513240] [2022-12-14 15:16:53,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424513240] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:53,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995693352] [2022-12-14 15:16:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:53,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:16:53,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:16:53,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:16:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:53,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 15:16:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:16:54,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:16:54,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995693352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:54,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:16:54,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [18] total 33 [2022-12-14 15:16:54,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172134559] [2022-12-14 15:16:54,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:54,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 15:16:54,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:54,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 15:16:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 15:16:54,483 INFO L87 Difference]: Start difference. First operand 10460 states and 13436 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 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 15:16:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:58,804 INFO L93 Difference]: Finished difference Result 17868 states and 22989 transitions. [2022-12-14 15:16:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:16:58,804 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 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 76 [2022-12-14 15:16:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:58,817 INFO L225 Difference]: With dead ends: 17868 [2022-12-14 15:16:58,818 INFO L226 Difference]: Without dead ends: 13302 [2022-12-14 15:16:58,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 15:16:58,823 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 512 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:58,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 1386 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 15:16:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13302 states. [2022-12-14 15:17:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13302 to 10955. [2022-12-14 15:17:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 10954 states have (on average 1.2859229505203578) internal successors, (14086), 10954 states have internal predecessors, (14086), 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 15:17:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 14086 transitions. [2022-12-14 15:17:01,264 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 14086 transitions. Word has length 76 [2022-12-14 15:17:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:01,264 INFO L495 AbstractCegarLoop]: Abstraction has 10955 states and 14086 transitions. [2022-12-14 15:17:01,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 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 15:17:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 14086 transitions. [2022-12-14 15:17:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 15:17:01,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:01,265 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:17:01,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:17:01,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 15:17:01,467 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 694416053, now seen corresponding path program 1 times [2022-12-14 15:17:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:17:01,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509977294] [2022-12-14 15:17:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:01,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:17:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:17:01,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:17:01,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509977294] [2022-12-14 15:17:01,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509977294] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:17:01,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:17:01,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:17:01,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095149512] [2022-12-14 15:17:01,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:17:01,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:17:01,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:17:01,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:17:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:17:01,584 INFO L87 Difference]: Start difference. First operand 10955 states and 14086 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 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 15:17:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:06,367 INFO L93 Difference]: Finished difference Result 27984 states and 36147 transitions. [2022-12-14 15:17:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:17:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 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 76 [2022-12-14 15:17:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:06,385 INFO L225 Difference]: With dead ends: 27984 [2022-12-14 15:17:06,385 INFO L226 Difference]: Without dead ends: 18772 [2022-12-14 15:17:06,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:17:06,394 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1018 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:06,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 236 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:17:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18772 states. [2022-12-14 15:17:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18772 to 14144. [2022-12-14 15:17:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14144 states, 14143 states have (on average 1.2732093615216007) internal successors, (18007), 14143 states have internal predecessors, (18007), 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 15:17:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14144 states to 14144 states and 18007 transitions. [2022-12-14 15:17:09,876 INFO L78 Accepts]: Start accepts. Automaton has 14144 states and 18007 transitions. Word has length 76 [2022-12-14 15:17:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:09,876 INFO L495 AbstractCegarLoop]: Abstraction has 14144 states and 18007 transitions. [2022-12-14 15:17:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 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 15:17:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 14144 states and 18007 transitions. [2022-12-14 15:17:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 15:17:09,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:09,877 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:17:09,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 15:17:09,877 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:09,878 INFO L85 PathProgramCache]: Analyzing trace with hash 816928112, now seen corresponding path program 1 times [2022-12-14 15:17:09,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:17:09,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627810235] [2022-12-14 15:17:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:09,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:17:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:17:10,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:17:10,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627810235] [2022-12-14 15:17:10,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627810235] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:10,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241987217] [2022-12-14 15:17:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:10,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:10,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:10,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:10,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:17:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:10,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 15:17:10,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:17:15,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:17:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:17:27,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241987217] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:17:27,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117385445] [2022-12-14 15:17:27,638 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-12-14 15:17:27,639 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:17:27,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:17:27,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:17:27,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:17:27,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:17:27,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:17:27,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 15:17:27,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:17:27,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:17:27,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:17:27,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 15:17:33,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:18:44,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2117385445] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:18:44,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:18:44,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [19, 18, 16] total 96 [2022-12-14 15:18:44,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460478681] [2022-12-14 15:18:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:18:44,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 15:18:44,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:44,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 15:18:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=7888, Unknown=3, NotChecked=0, Total=9120 [2022-12-14 15:18:44,207 INFO L87 Difference]: Start difference. First operand 14144 states and 18007 transitions. Second operand has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 50 states have internal predecessors, (72), 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 15:19:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:19:00,119 INFO L93 Difference]: Finished difference Result 19291 states and 24586 transitions. [2022-12-14 15:19:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 15:19:00,120 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 50 states have internal predecessors, (72), 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 76 [2022-12-14 15:19:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:19:00,132 INFO L225 Difference]: With dead ends: 19291 [2022-12-14 15:19:00,132 INFO L226 Difference]: Without dead ends: 14056 [2022-12-14 15:19:00,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 139 SyntacticMatches, 12 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4612 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=1254, Invalid=8055, Unknown=3, NotChecked=0, Total=9312 [2022-12-14 15:19:00,139 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 17 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 5045 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 5050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:19:00,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 285 Invalid, 5050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5045 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-12-14 15:19:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14056 states. [2022-12-14 15:19:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14056 to 14054. [2022-12-14 15:19:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14054 states, 14053 states have (on average 1.2734647406247777) internal successors, (17896), 14053 states have internal predecessors, (17896), 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 15:19:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14054 states to 14054 states and 17896 transitions. [2022-12-14 15:19:03,538 INFO L78 Accepts]: Start accepts. Automaton has 14054 states and 17896 transitions. Word has length 76 [2022-12-14 15:19:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:19:03,539 INFO L495 AbstractCegarLoop]: Abstraction has 14054 states and 17896 transitions. [2022-12-14 15:19:03,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 50 states have internal predecessors, (72), 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 15:19:03,539 INFO L276 IsEmpty]: Start isEmpty. Operand 14054 states and 17896 transitions. [2022-12-14 15:19:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 15:19:03,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:19:03,540 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:19:03,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:19:03,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 15:19:03,742 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:19:03,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:19:03,743 INFO L85 PathProgramCache]: Analyzing trace with hash -944575092, now seen corresponding path program 1 times [2022-12-14 15:19:03,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:19:03,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605208639] [2022-12-14 15:19:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:03,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:19:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:19:04,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:19:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605208639] [2022-12-14 15:19:04,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605208639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:19:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446366333] [2022-12-14 15:19:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:04,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:19:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:19:04,670 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:19:04,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:19:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:04,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 15:19:04,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:19:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:19:06,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:19:06,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446366333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:19:06,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:19:06,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [18] total 33 [2022-12-14 15:19:06,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601892981] [2022-12-14 15:19:06,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:19:06,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 15:19:06,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:19:06,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 15:19:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 15:19:06,369 INFO L87 Difference]: Start difference. First operand 14054 states and 17896 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 states have internal predecessors, (72), 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 15:19:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:19:11,986 INFO L93 Difference]: Finished difference Result 21193 states and 27118 transitions. [2022-12-14 15:19:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:19:11,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 states have internal predecessors, (72), 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 76 [2022-12-14 15:19:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:19:12,002 INFO L225 Difference]: With dead ends: 21193 [2022-12-14 15:19:12,002 INFO L226 Difference]: Without dead ends: 15874 [2022-12-14 15:19:12,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:19:12,007 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 494 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:19:12,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 899 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 15:19:12,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2022-12-14 15:19:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 14182. [2022-12-14 15:19:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14182 states, 14181 states have (on average 1.2726888089697483) internal successors, (18048), 14181 states have internal predecessors, (18048), 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 15:19:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14182 states to 14182 states and 18048 transitions. [2022-12-14 15:19:15,530 INFO L78 Accepts]: Start accepts. Automaton has 14182 states and 18048 transitions. Word has length 76 [2022-12-14 15:19:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:19:15,530 INFO L495 AbstractCegarLoop]: Abstraction has 14182 states and 18048 transitions. [2022-12-14 15:19:15,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 states have internal predecessors, (72), 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 15:19:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 14182 states and 18048 transitions. [2022-12-14 15:19:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 15:19:15,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:19:15,531 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:19:15,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:19:15,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 15:19:15,733 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:19:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:19:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1703450150, now seen corresponding path program 1 times [2022-12-14 15:19:15,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:19:15,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483202376] [2022-12-14 15:19:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:15,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:19:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:19:16,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:19:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483202376] [2022-12-14 15:19:16,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483202376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:19:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115882574] [2022-12-14 15:19:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:16,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:19:16,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:19:16,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:19:16,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4daba36d-f628-4a3a-acef-f604fd491c21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:19:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:16,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 15:19:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:19:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:19:24,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:22:06,190 WARN L233 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 492 DAG size of output: 487 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:27:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:27:46,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115882574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:27:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614971327] [2022-12-14 15:27:46,874 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-12-14 15:27:46,875 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:27:46,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:27:46,875 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:27:46,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:27:46,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:27:46,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:27:46,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:27:46,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 15:27:46,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:27:46,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:27:46,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 15:28:20,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:29:12,758 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '588531#(and (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1| 127) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= 1 ~__return_6462~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1|) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= ~__return_6532~0 1) (= ~__return_6546~0 0) (<= 0 ~__return_6532~0) (<= 0 |ULTIMATE.start_main_~__tmp_3~0#1|) (<= |ULTIMATE.start_main_~__tmp_3~0#1| 1) (= ~__return_6718~0 0) (<= 0 ~id1~0) (= |ULTIMATE.start_main_~check__tmp~1#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~2#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~2#1| 1)) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~1#1| 1)) (= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send1~0 127) (<= 1 ~__tmp_6533_0~0) (<= 0 (+ ~p3_old~0 1)) (<= 1 ~__return_6399~0) (= (mod |ULTIMATE.start_main_~assert__arg~2#1| 256) 0) (<= ~mode2~0 1) (<= |ULTIMATE.start_main_~check__tmp~2#1| 1) (<= 0 ~st2~0) (<= ~mode3~0 1) (<= ~__return_6399~0 1) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= 2 |ULTIMATE.start_main_~main__i2~0#1|) (<= ~__return_6462~0 1) (<= (+ ~nomsg~0 1) 0) (<= 1 ~__return_6321~0) (<= ~mode1~0 1) (<= (+ ~p2_new~0 1) 0) (<= (+ |ULTIMATE.start_main_~node1__m1~2#1| 1) 0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (<= 1 ~__tmp_6490_0~0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~1#1| 1) 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= 0 |ULTIMATE.start_main_~assert__arg~2#1|) (<= 0 ~mode2~0) (<= (+ |ULTIMATE.start_main_~node1__m1~1#1| 1) 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= ~__return_6321~0 1) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~1#1| 1)) (<= |ULTIMATE.start_main_~assert__arg~2#1| 1) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|))' at error location [2022-12-14 15:29:12,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:29:12,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:29:12,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 28, 29] total 68 [2022-12-14 15:29:12,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336817033] [2022-12-14 15:29:12,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:12,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 15:29:12,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:12,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 15:29:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2191, Invalid=13811, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 15:29:12,764 INFO L87 Difference]: Start difference. First operand 14182 states and 18048 transitions. Second operand has 68 states, 68 states have (on average 3.4411764705882355) internal successors, (234), 68 states have internal predecessors, (234), 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 15:29:19,960 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 1028 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:29:26,570 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 1030 DAG size of output: 150 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:29:47,079 WARN L233 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 1028 DAG size of output: 217 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:29:55,802 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 980 DAG size of output: 204 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:30:01,615 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 1032 DAG size of output: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)