./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS --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 38de1f601deff70f21f1ef1f0123eb0d7f517b820846e07815605162625b0305 --- 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-8393723 [2022-11-19 08:34:19,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:34:19,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:34:19,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:34:19,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:34:19,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:34:19,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:34:19,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:34:19,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:34:19,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:34:19,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:34:19,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:34:19,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:34:19,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:34:19,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:34:19,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:34:19,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:34:19,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:34:19,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:34:19,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:34:19,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:34:19,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:34:19,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:34:19,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:34:19,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:34:19,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:34:19,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:34:19,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:34:19,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:34:19,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:34:19,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:34:19,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:34:19,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:34:19,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:34:19,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:34:19,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:34:19,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:34:19,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:34:19,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:34:19,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:34:19,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:34:19,730 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:34:19,786 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:34:19,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:34:19,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:34:19,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:34:19,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:34:19,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:34:19,789 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:34:19,790 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:34:19,790 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:34:19,790 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:34:19,792 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:34:19,792 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:34:19,792 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:34:19,793 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:34:19,793 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:34:19,793 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:34:19,794 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:34:19,794 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:34:19,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:34:19,795 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:34:19,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:34:19,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:34:19,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:34:19,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:34:19,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:34:19,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:34:19,799 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:34:19,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:34:19,800 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:34:19,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:34:19,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:34:19,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:34:19,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:34:19,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:34:19,802 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:34:19,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:34:19,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:34:19,803 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:34:19,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:34:19,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:34:19,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:34:19,804 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_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38de1f601deff70f21f1ef1f0123eb0d7f517b820846e07815605162625b0305 [2022-11-19 08:34:20,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:34:20,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:34:20,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:34:20,245 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:34:20,246 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:34:20,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-11-19 08:34:20,345 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/data/ac90ed585/c9edc0059ed84ebfb2d91535a886e378/FLAG99d836ed1 [2022-11-19 08:34:21,253 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:34:21,258 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-11-19 08:34:21,279 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/data/ac90ed585/c9edc0059ed84ebfb2d91535a886e378/FLAG99d836ed1 [2022-11-19 08:34:21,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/data/ac90ed585/c9edc0059ed84ebfb2d91535a886e378 [2022-11-19 08:34:21,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:34:21,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:34:21,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:21,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:34:21,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:34:21,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:21" (1/1) ... [2022-11-19 08:34:21,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a430e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:21, skipping insertion in model container [2022-11-19 08:34:21,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:21" (1/1) ... [2022-11-19 08:34:21,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:34:21,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:34:22,382 WARN L234 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_5d91f2fe-9881-4bed-a8f1-133f5ed96279/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2022-11-19 08:34:22,518 WARN L234 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_5d91f2fe-9881-4bed-a8f1-133f5ed96279/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2022-11-19 08:34:22,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:22,908 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:34:23,252 WARN L234 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_5d91f2fe-9881-4bed-a8f1-133f5ed96279/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2022-11-19 08:34:23,334 WARN L234 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_5d91f2fe-9881-4bed-a8f1-133f5ed96279/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2022-11-19 08:34:23,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:23,673 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:34:23,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23 WrapperNode [2022-11-19 08:34:23,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:23,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:34:23,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:34:23,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:34:23,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:23,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:23,879 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3812 [2022-11-19 08:34:23,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:34:23,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:34:23,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:34:23,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:34:23,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:23,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:23,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:23,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:23,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:24,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:24,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:24,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:24,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:34:24,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:34:24,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:34:24,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:34:24,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (1/1) ... [2022-11-19 08:34:24,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:34:24,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:24,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:34:24,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d91f2fe-9881-4bed-a8f1-133f5ed96279/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:34:24,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:34:24,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:34:24,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:34:24,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:34:24,556 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:34:24,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:34:27,859 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:34:30,404 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:34:30,405 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:34:30,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:34:30 BoogieIcfgContainer [2022-11-19 08:34:30,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:34:30,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:34:30,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:34:30,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:34:30,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:34:21" (1/3) ... [2022-11-19 08:34:30,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8e2f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:34:30, skipping insertion in model container [2022-11-19 08:34:30,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:23" (2/3) ... [2022-11-19 08:34:30,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8e2f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:34:30, skipping insertion in model container [2022-11-19 08:34:30,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:34:30" (3/3) ... [2022-11-19 08:34:30,422 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-11-19 08:34:30,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:34:30,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:34:30,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:34:30,662 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;@3c949251, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:34:30,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:34:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 737 states, 734 states have (on average 1.6362397820163488) internal successors, (1201), 736 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 08:34:30,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:30,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:30,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash -437292113, now seen corresponding path program 1 times [2022-11-19 08:34:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:30,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030396406] [2022-11-19 08:34:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:30,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:37,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:37,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030396406] [2022-11-19 08:34:37,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030396406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:37,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:37,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:37,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986648120] [2022-11-19 08:34:37,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:37,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:37,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:37,961 INFO L87 Difference]: Start difference. First operand has 737 states, 734 states have (on average 1.6362397820163488) internal successors, (1201), 736 states have internal predecessors, (1201), 0 states have call successors, (0), 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 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:38,808 INFO L93 Difference]: Finished difference Result 1761 states and 2878 transitions. [2022-11-19 08:34:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:38,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-19 08:34:38,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:38,846 INFO L225 Difference]: With dead ends: 1761 [2022-11-19 08:34:38,846 INFO L226 Difference]: Without dead ends: 1158 [2022-11-19 08:34:38,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:38,871 INFO L413 NwaCegarLoop]: 1240 mSDtfsCounter, 876 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 3118 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:38,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 3118 Invalid, 216 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [18 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:34:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-11-19 08:34:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1154. [2022-11-19 08:34:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1152 states have (on average 1.6284722222222223) internal successors, (1876), 1153 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1876 transitions. [2022-11-19 08:34:39,047 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1876 transitions. Word has length 99 [2022-11-19 08:34:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:39,048 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1876 transitions. [2022-11-19 08:34:39,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1876 transitions. [2022-11-19 08:34:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-19 08:34:39,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:39,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:39,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:34:39,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:39,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1456315218, now seen corresponding path program 1 times [2022-11-19 08:34:39,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:39,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157590737] [2022-11-19 08:34:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:39,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:40,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157590737] [2022-11-19 08:34:40,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157590737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:40,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:40,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490806638] [2022-11-19 08:34:40,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:40,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:40,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:40,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:40,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:40,961 INFO L87 Difference]: Start difference. First operand 1154 states and 1876 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:41,806 INFO L93 Difference]: Finished difference Result 2600 states and 4229 transitions. [2022-11-19 08:34:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:41,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2022-11-19 08:34:41,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:41,820 INFO L225 Difference]: With dead ends: 2600 [2022-11-19 08:34:41,821 INFO L226 Difference]: Without dead ends: 1585 [2022-11-19 08:34:41,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:41,826 INFO L413 NwaCegarLoop]: 1858 mSDtfsCounter, 1897 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1897 SdHoareTripleChecker+Valid, 2777 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:41,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1897 Valid, 2777 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:34:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-11-19 08:34:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1581. [2022-11-19 08:34:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1579 states have (on average 1.6111462951234958) internal successors, (2544), 1580 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2544 transitions. [2022-11-19 08:34:41,989 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2544 transitions. Word has length 105 [2022-11-19 08:34:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:41,992 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2544 transitions. [2022-11-19 08:34:41,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2544 transitions. [2022-11-19 08:34:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 08:34:42,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:42,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:42,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:34:42,010 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash -450266623, now seen corresponding path program 1 times [2022-11-19 08:34:42,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:42,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113239324] [2022-11-19 08:34:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:42,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:46,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:46,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113239324] [2022-11-19 08:34:46,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113239324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:46,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:46,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:46,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081576862] [2022-11-19 08:34:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:46,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:46,251 INFO L87 Difference]: Start difference. First operand 1581 states and 2544 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:46,975 INFO L93 Difference]: Finished difference Result 4068 states and 6562 transitions. [2022-11-19 08:34:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2022-11-19 08:34:46,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:46,990 INFO L225 Difference]: With dead ends: 4068 [2022-11-19 08:34:46,991 INFO L226 Difference]: Without dead ends: 2645 [2022-11-19 08:34:46,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:46,996 INFO L413 NwaCegarLoop]: 1117 mSDtfsCounter, 1730 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:46,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1730 Valid, 2017 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:34:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2022-11-19 08:34:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2641. [2022-11-19 08:34:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2639 states have (on average 1.610458507010231) internal successors, (4250), 2640 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4250 transitions. [2022-11-19 08:34:47,236 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4250 transitions. Word has length 108 [2022-11-19 08:34:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:47,236 INFO L495 AbstractCegarLoop]: Abstraction has 2641 states and 4250 transitions. [2022-11-19 08:34:47,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4250 transitions. [2022-11-19 08:34:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 08:34:47,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:47,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:47,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:34:47,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash -440725989, now seen corresponding path program 1 times [2022-11-19 08:34:47,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:47,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592803413] [2022-11-19 08:34:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:47,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:48,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592803413] [2022-11-19 08:34:48,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592803413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:48,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:48,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:48,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085218138] [2022-11-19 08:34:48,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:48,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:48,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:48,805 INFO L87 Difference]: Start difference. First operand 2641 states and 4250 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:49,752 INFO L93 Difference]: Finished difference Result 6304 states and 10156 transitions. [2022-11-19 08:34:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:49,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2022-11-19 08:34:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:49,774 INFO L225 Difference]: With dead ends: 6304 [2022-11-19 08:34:49,774 INFO L226 Difference]: Without dead ends: 3820 [2022-11-19 08:34:49,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:49,792 INFO L413 NwaCegarLoop]: 1879 mSDtfsCounter, 976 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 3733 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:49,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 3733 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:34:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2022-11-19 08:34:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 3816. [2022-11-19 08:34:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3814 states have (on average 1.6082852648138437) internal successors, (6134), 3815 states have internal predecessors, (6134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 6134 transitions. [2022-11-19 08:34:50,303 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 6134 transitions. Word has length 114 [2022-11-19 08:34:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:50,304 INFO L495 AbstractCegarLoop]: Abstraction has 3816 states and 6134 transitions. [2022-11-19 08:34:50,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 6134 transitions. [2022-11-19 08:34:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 08:34:50,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:50,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:50,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:34:50,314 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:50,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:50,315 INFO L85 PathProgramCache]: Analyzing trace with hash 376379404, now seen corresponding path program 1 times [2022-11-19 08:34:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:50,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095277510] [2022-11-19 08:34:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:53,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:53,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095277510] [2022-11-19 08:34:53,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095277510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:53,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:53,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965269046] [2022-11-19 08:34:53,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:53,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:53,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:53,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:53,691 INFO L87 Difference]: Start difference. First operand 3816 states and 6134 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:54,866 INFO L93 Difference]: Finished difference Result 10173 states and 16383 transitions. [2022-11-19 08:34:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:54,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2022-11-19 08:34:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:54,897 INFO L225 Difference]: With dead ends: 10173 [2022-11-19 08:34:54,899 INFO L226 Difference]: Without dead ends: 6533 [2022-11-19 08:34:54,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:54,918 INFO L413 NwaCegarLoop]: 1335 mSDtfsCounter, 864 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 3077 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:54,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 3077 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:34:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2022-11-19 08:34:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 6529. [2022-11-19 08:34:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6527 states have (on average 1.6053316990960624) internal successors, (10478), 6528 states have internal predecessors, (10478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 10478 transitions. [2022-11-19 08:34:55,716 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 10478 transitions. Word has length 117 [2022-11-19 08:34:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:55,719 INFO L495 AbstractCegarLoop]: Abstraction has 6529 states and 10478 transitions. [2022-11-19 08:34:55,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 10478 transitions. [2022-11-19 08:34:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 08:34:55,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:55,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:55,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:34:55,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash 132110001, now seen corresponding path program 1 times [2022-11-19 08:34:55,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:55,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282652990] [2022-11-19 08:34:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:55,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:57,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:57,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282652990] [2022-11-19 08:34:57,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282652990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:57,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:57,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469790817] [2022-11-19 08:34:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:57,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:57,134 INFO L87 Difference]: Start difference. First operand 6529 states and 10478 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:58,977 INFO L93 Difference]: Finished difference Result 16046 states and 25780 transitions. [2022-11-19 08:34:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:58,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2022-11-19 08:34:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:59,027 INFO L225 Difference]: With dead ends: 16046 [2022-11-19 08:34:59,027 INFO L226 Difference]: Without dead ends: 9692 [2022-11-19 08:34:59,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:59,041 INFO L413 NwaCegarLoop]: 1849 mSDtfsCounter, 973 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 3647 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 3647 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:34:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9692 states. [2022-11-19 08:34:59,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9692 to 9688. [2022-11-19 08:35:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9686 states have (on average 1.602828825108404) internal successors, (15525), 9687 states have internal predecessors, (15525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 15525 transitions. [2022-11-19 08:35:00,044 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 15525 transitions. Word has length 123 [2022-11-19 08:35:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:00,044 INFO L495 AbstractCegarLoop]: Abstraction has 9688 states and 15525 transitions. [2022-11-19 08:35:00,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 15525 transitions. [2022-11-19 08:35:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:35:00,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:00,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:00,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:35:00,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:00,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2120245380, now seen corresponding path program 1 times [2022-11-19 08:35:00,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:00,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946712137] [2022-11-19 08:35:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:00,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:03,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:03,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946712137] [2022-11-19 08:35:03,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946712137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:03,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:03,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:35:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778314794] [2022-11-19 08:35:03,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:03,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:35:03,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:35:03,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:03,217 INFO L87 Difference]: Start difference. First operand 9688 states and 15525 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:05,185 INFO L93 Difference]: Finished difference Result 26097 states and 41873 transitions. [2022-11-19 08:35:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:35:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2022-11-19 08:35:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:05,238 INFO L225 Difference]: With dead ends: 26097 [2022-11-19 08:35:05,238 INFO L226 Difference]: Without dead ends: 16603 [2022-11-19 08:35:05,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:05,256 INFO L413 NwaCegarLoop]: 1113 mSDtfsCounter, 1710 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:05,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 1955 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:35:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16603 states. [2022-11-19 08:35:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16603 to 16599. [2022-11-19 08:35:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16599 states, 16597 states have (on average 1.5975176236669277) internal successors, (26514), 16598 states have internal predecessors, (26514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16599 states to 16599 states and 26514 transitions. [2022-11-19 08:35:07,493 INFO L78 Accepts]: Start accepts. Automaton has 16599 states and 26514 transitions. Word has length 126 [2022-11-19 08:35:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:07,493 INFO L495 AbstractCegarLoop]: Abstraction has 16599 states and 26514 transitions. [2022-11-19 08:35:07,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 16599 states and 26514 transitions. [2022-11-19 08:35:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-19 08:35:07,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:07,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:07,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:35:07,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:07,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2013997458, now seen corresponding path program 1 times [2022-11-19 08:35:07,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:07,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779903905] [2022-11-19 08:35:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:07,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:08,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:08,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779903905] [2022-11-19 08:35:08,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779903905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:08,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:08,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:35:08,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87990777] [2022-11-19 08:35:08,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:08,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:35:08,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:08,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:35:08,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:08,608 INFO L87 Difference]: Start difference. First operand 16599 states and 26514 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:11,021 INFO L93 Difference]: Finished difference Result 41388 states and 66192 transitions. [2022-11-19 08:35:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:35:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-11-19 08:35:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:11,100 INFO L225 Difference]: With dead ends: 41388 [2022-11-19 08:35:11,101 INFO L226 Difference]: Without dead ends: 24982 [2022-11-19 08:35:11,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:11,123 INFO L413 NwaCegarLoop]: 1819 mSDtfsCounter, 1921 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1921 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:11,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1921 Valid, 2690 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:35:11,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24982 states. [2022-11-19 08:35:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24982 to 24978. [2022-11-19 08:35:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24978 states, 24976 states have (on average 1.5948910954516335) internal successors, (39834), 24977 states have internal predecessors, (39834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24978 states to 24978 states and 39834 transitions. [2022-11-19 08:35:13,413 INFO L78 Accepts]: Start accepts. Automaton has 24978 states and 39834 transitions. Word has length 132 [2022-11-19 08:35:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:13,413 INFO L495 AbstractCegarLoop]: Abstraction has 24978 states and 39834 transitions. [2022-11-19 08:35:13,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 24978 states and 39834 transitions. [2022-11-19 08:35:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-19 08:35:13,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:13,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:13,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:35:13,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:13,461 INFO L85 PathProgramCache]: Analyzing trace with hash -644704025, now seen corresponding path program 1 times [2022-11-19 08:35:13,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:13,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579572865] [2022-11-19 08:35:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:13,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:16,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:16,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579572865] [2022-11-19 08:35:16,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579572865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:16,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:16,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:35:16,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703813447] [2022-11-19 08:35:16,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:35:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:35:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:16,763 INFO L87 Difference]: Start difference. First operand 24978 states and 39834 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:20,438 INFO L93 Difference]: Finished difference Result 62986 states and 100243 transitions. [2022-11-19 08:35:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:35:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2022-11-19 08:35:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:20,527 INFO L225 Difference]: With dead ends: 62986 [2022-11-19 08:35:20,527 INFO L226 Difference]: Without dead ends: 38214 [2022-11-19 08:35:20,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:20,566 INFO L413 NwaCegarLoop]: 1815 mSDtfsCounter, 1849 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 2693 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:20,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1849 Valid, 2693 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:35:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2022-11-19 08:35:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2022-11-19 08:35:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.5799832495812396) internal successors, (60368), 38209 states have internal predecessors, (60368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 60368 transitions. [2022-11-19 08:35:23,923 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 60368 transitions. Word has length 135 [2022-11-19 08:35:23,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:23,923 INFO L495 AbstractCegarLoop]: Abstraction has 38210 states and 60368 transitions. [2022-11-19 08:35:23,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 60368 transitions. [2022-11-19 08:35:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 08:35:23,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:23,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:23,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:35:23,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:23,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1518658920, now seen corresponding path program 1 times [2022-11-19 08:35:23,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:23,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290079153] [2022-11-19 08:35:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:23,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:27,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290079153] [2022-11-19 08:35:27,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290079153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:27,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:27,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:35:27,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168616892] [2022-11-19 08:35:27,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:27,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:35:27,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:35:27,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:27,039 INFO L87 Difference]: Start difference. First operand 38210 states and 60368 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:31,175 INFO L93 Difference]: Finished difference Result 76218 states and 120418 transitions. [2022-11-19 08:35:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:35:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2022-11-19 08:35:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:31,250 INFO L225 Difference]: With dead ends: 76218 [2022-11-19 08:35:31,250 INFO L226 Difference]: Without dead ends: 38214 [2022-11-19 08:35:31,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:31,296 INFO L413 NwaCegarLoop]: 1821 mSDtfsCounter, 932 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:31,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 3625 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:35:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2022-11-19 08:35:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2022-11-19 08:35:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.575298366834171) internal successors, (60189), 38209 states have internal predecessors, (60189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 60189 transitions. [2022-11-19 08:35:35,339 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 60189 transitions. Word has length 136 [2022-11-19 08:35:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:35,340 INFO L495 AbstractCegarLoop]: Abstraction has 38210 states and 60189 transitions. [2022-11-19 08:35:35,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 60189 transitions. [2022-11-19 08:35:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-19 08:35:35,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:35,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:35,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:35:35,380 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:35,381 INFO L85 PathProgramCache]: Analyzing trace with hash -286827826, now seen corresponding path program 1 times [2022-11-19 08:35:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:35,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124019443] [2022-11-19 08:35:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:35,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:37,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:37,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124019443] [2022-11-19 08:35:37,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124019443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:37,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:37,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:35:37,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452521138] [2022-11-19 08:35:37,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:37,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:35:37,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:37,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:35:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:37,895 INFO L87 Difference]: Start difference. First operand 38210 states and 60189 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:42,557 INFO L93 Difference]: Finished difference Result 76218 states and 120061 transitions. [2022-11-19 08:35:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:35:42,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2022-11-19 08:35:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:42,644 INFO L225 Difference]: With dead ends: 76218 [2022-11-19 08:35:42,645 INFO L226 Difference]: Without dead ends: 38214 [2022-11-19 08:35:42,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:42,686 INFO L413 NwaCegarLoop]: 1811 mSDtfsCounter, 961 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 3561 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:42,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 3561 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:35:42,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2022-11-19 08:35:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2022-11-19 08:35:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.5706134840871022) internal successors, (60010), 38209 states have internal predecessors, (60010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 60010 transitions. [2022-11-19 08:35:46,802 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 60010 transitions. Word has length 137 [2022-11-19 08:35:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:46,802 INFO L495 AbstractCegarLoop]: Abstraction has 38210 states and 60010 transitions. [2022-11-19 08:35:46,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 60010 transitions. [2022-11-19 08:35:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-19 08:35:46,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:46,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:46,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:35:46,829 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1799859487, now seen corresponding path program 1 times [2022-11-19 08:35:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:46,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446275792] [2022-11-19 08:35:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:46,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:49,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:49,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446275792] [2022-11-19 08:35:49,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446275792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:49,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:49,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:35:49,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105831492] [2022-11-19 08:35:49,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:49,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:35:49,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:49,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:35:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:49,504 INFO L87 Difference]: Start difference. First operand 38210 states and 60010 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)