./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur --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 8eb51bb6f9c94e581d6ba21c25f6021e38364df0ee9c7b7b096e4c3b9d6ac008 --- 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-38b53e6 [2022-11-26 01:03:45,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:03:45,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:03:45,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:03:45,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:03:45,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:03:45,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:03:45,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:03:45,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:03:45,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:03:45,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:03:45,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:03:45,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:03:45,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:03:45,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:03:45,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:03:45,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:03:45,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:03:45,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:03:45,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:03:45,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:03:45,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:03:45,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:03:45,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:03:45,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:03:45,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:03:45,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:03:45,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:03:45,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:03:46,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:03:46,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:03:46,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:03:46,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:03:46,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:03:46,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:03:46,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:03:46,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:03:46,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:03:46,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:03:46,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:03:46,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:03:46,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:03:46,039 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:03:46,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:03:46,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:03:46,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:03:46,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:03:46,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:03:46,041 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:03:46,041 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:03:46,041 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:03:46,042 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:03:46,042 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:03:46,042 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:03:46,042 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:03:46,042 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:03:46,043 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:03:46,043 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:03:46,043 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:03:46,043 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:03:46,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:03:46,044 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:03:46,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:03:46,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:03:46,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:03:46,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:03:46,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:03:46,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:03:46,046 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:03:46,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:03:46,046 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:03:46,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:03:46,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:03:46,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:03:46,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:03:46,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:03:46,048 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:03:46,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:03:46,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:03:46,049 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:03:46,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:03:46,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:03:46,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:03:46,049 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_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8eb51bb6f9c94e581d6ba21c25f6021e38364df0ee9c7b7b096e4c3b9d6ac008 [2022-11-26 01:03:46,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:03:46,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:03:46,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:03:46,340 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:03:46,343 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:03:46,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-26 01:03:49,606 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:03:49,870 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:03:49,871 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-26 01:03:49,884 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/data/6d6f04468/99712f57a2fb41a99bc8f145fc85f4fb/FLAGc3efc03cf [2022-11-26 01:03:49,908 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/data/6d6f04468/99712f57a2fb41a99bc8f145fc85f4fb [2022-11-26 01:03:49,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:03:49,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:03:49,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:03:49,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:03:49,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:03:49,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:03:49" (1/1) ... [2022-11-26 01:03:49,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409d1c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:49, skipping insertion in model container [2022-11-26 01:03:49,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:03:49" (1/1) ... [2022-11-26 01:03:49,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:03:50,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:03:50,296 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2022-11-26 01:03:50,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:03:50,384 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:03:50,444 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2022-11-26 01:03:50,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:03:50,496 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:03:50,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50 WrapperNode [2022-11-26 01:03:50,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:03:50,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:03:50,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:03:50,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:03:50,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,597 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 635 [2022-11-26 01:03:50,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:03:50,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:03:50,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:03:50,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:03:50,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,697 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:03:50,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:03:50,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:03:50,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:03:50,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (1/1) ... [2022-11-26 01:03:50,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:03:50,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:50,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:03:50,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:03:50,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:03:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:03:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:03:50,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:03:51,049 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:03:51,051 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:03:51,811 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:03:52,212 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:03:52,212 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 01:03:52,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:03:52 BoogieIcfgContainer [2022-11-26 01:03:52,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:03:52,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:03:52,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:03:52,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:03:52,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:03:49" (1/3) ... [2022-11-26 01:03:52,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7809f03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:03:52, skipping insertion in model container [2022-11-26 01:03:52,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:03:50" (2/3) ... [2022-11-26 01:03:52,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7809f03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:03:52, skipping insertion in model container [2022-11-26 01:03:52,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:03:52" (3/3) ... [2022-11-26 01:03:52,226 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-26 01:03:52,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:03:52,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:03:52,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:03:52,321 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;@7cae97d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:03:52,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:03:52,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 96 states have (on average 1.7604166666666667) internal successors, (169), 97 states have internal predecessors, (169), 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) [2022-11-26 01:03:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 01:03:52,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:52,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:52,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:52,344 INFO L85 PathProgramCache]: Analyzing trace with hash 329552140, now seen corresponding path program 1 times [2022-11-26 01:03:52,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:52,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511549557] [2022-11-26 01:03:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:52,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:52,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511549557] [2022-11-26 01:03:52,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511549557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:52,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:52,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:03:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721605536] [2022-11-26 01:03:52,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:52,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:03:52,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:52,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:03:52,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:52,944 INFO L87 Difference]: Start difference. First operand has 98 states, 96 states have (on average 1.7604166666666667) internal successors, (169), 97 states have internal predecessors, (169), 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 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:53,057 INFO L93 Difference]: Finished difference Result 216 states and 358 transitions. [2022-11-26 01:03:53,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:03:53,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-26 01:03:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:53,072 INFO L225 Difference]: With dead ends: 216 [2022-11-26 01:03:53,072 INFO L226 Difference]: Without dead ends: 146 [2022-11-26 01:03:53,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:53,080 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 108 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:53,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 360 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:03:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-26 01:03:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-11-26 01:03:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.5034965034965035) internal successors, (215), 143 states have internal predecessors, (215), 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) [2022-11-26 01:03:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 215 transitions. [2022-11-26 01:03:53,171 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 215 transitions. Word has length 43 [2022-11-26 01:03:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:53,172 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 215 transitions. [2022-11-26 01:03:53,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 215 transitions. [2022-11-26 01:03:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 01:03:53,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:53,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:53,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:03:53,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:53,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:53,176 INFO L85 PathProgramCache]: Analyzing trace with hash 497269843, now seen corresponding path program 1 times [2022-11-26 01:03:53,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:53,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189728488] [2022-11-26 01:03:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:53,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:53,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:53,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189728488] [2022-11-26 01:03:53,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189728488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:53,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:53,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:03:53,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592855116] [2022-11-26 01:03:53,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:53,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:03:53,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:03:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:53,435 INFO L87 Difference]: Start difference. First operand 144 states and 215 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:53,632 INFO L93 Difference]: Finished difference Result 321 states and 502 transitions. [2022-11-26 01:03:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:03:53,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-26 01:03:53,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:53,647 INFO L225 Difference]: With dead ends: 321 [2022-11-26 01:03:53,647 INFO L226 Difference]: Without dead ends: 209 [2022-11-26 01:03:53,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:53,650 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 95 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:53,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 225 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:03:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-26 01:03:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-11-26 01:03:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.5242718446601942) internal successors, (314), 206 states have internal predecessors, (314), 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) [2022-11-26 01:03:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 314 transitions. [2022-11-26 01:03:53,697 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 314 transitions. Word has length 45 [2022-11-26 01:03:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:53,697 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 314 transitions. [2022-11-26 01:03:53,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 314 transitions. [2022-11-26 01:03:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-26 01:03:53,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:53,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:53,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:03:53,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:53,701 INFO L85 PathProgramCache]: Analyzing trace with hash 385793492, now seen corresponding path program 1 times [2022-11-26 01:03:53,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:53,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141499125] [2022-11-26 01:03:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:53,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:53,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:53,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141499125] [2022-11-26 01:03:53,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141499125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:53,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:53,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:03:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124403489] [2022-11-26 01:03:53,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:53,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:03:53,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:53,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:03:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:53,911 INFO L87 Difference]: Start difference. First operand 207 states and 314 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:54,033 INFO L93 Difference]: Finished difference Result 511 states and 805 transitions. [2022-11-26 01:03:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:03:54,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-26 01:03:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:54,037 INFO L225 Difference]: With dead ends: 511 [2022-11-26 01:03:54,038 INFO L226 Difference]: Without dead ends: 338 [2022-11-26 01:03:54,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:54,040 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 95 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:54,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 276 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:03:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-26 01:03:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2022-11-26 01:03:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.5552238805970149) internal successors, (521), 335 states have internal predecessors, (521), 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) [2022-11-26 01:03:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 521 transitions. [2022-11-26 01:03:54,104 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 521 transitions. Word has length 47 [2022-11-26 01:03:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:54,105 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 521 transitions. [2022-11-26 01:03:54,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 521 transitions. [2022-11-26 01:03:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 01:03:54,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:54,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:54,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:03:54,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2142314995, now seen corresponding path program 1 times [2022-11-26 01:03:54,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:54,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984761532] [2022-11-26 01:03:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:54,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:54,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:54,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984761532] [2022-11-26 01:03:54,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984761532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:54,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:54,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:03:54,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161343841] [2022-11-26 01:03:54,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:54,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:03:54,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:54,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:03:54,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:54,291 INFO L87 Difference]: Start difference. First operand 336 states and 521 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:54,410 INFO L93 Difference]: Finished difference Result 827 states and 1312 transitions. [2022-11-26 01:03:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:03:54,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-26 01:03:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:54,416 INFO L225 Difference]: With dead ends: 827 [2022-11-26 01:03:54,416 INFO L226 Difference]: Without dead ends: 525 [2022-11-26 01:03:54,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:54,421 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 94 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:54,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 241 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:03:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-26 01:03:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 523. [2022-11-26 01:03:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.5727969348659003) internal successors, (821), 522 states have internal predecessors, (821), 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) [2022-11-26 01:03:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 821 transitions. [2022-11-26 01:03:54,511 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 821 transitions. Word has length 49 [2022-11-26 01:03:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:54,511 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 821 transitions. [2022-11-26 01:03:54,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 821 transitions. [2022-11-26 01:03:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-26 01:03:54,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:54,520 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] [2022-11-26 01:03:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 01:03:54,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1343889268, now seen corresponding path program 1 times [2022-11-26 01:03:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:54,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844589421] [2022-11-26 01:03:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:54,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:54,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:54,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844589421] [2022-11-26 01:03:54,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844589421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:54,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:54,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:03:54,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817418753] [2022-11-26 01:03:54,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:54,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:03:54,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:54,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:03:54,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:54,639 INFO L87 Difference]: Start difference. First operand 523 states and 821 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-26 01:03:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:54,820 INFO L93 Difference]: Finished difference Result 1343 states and 2140 transitions. [2022-11-26 01:03:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:03:54,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 51 [2022-11-26 01:03:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:54,829 INFO L225 Difference]: With dead ends: 1343 [2022-11-26 01:03:54,829 INFO L226 Difference]: Without dead ends: 870 [2022-11-26 01:03:54,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:54,836 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 89 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:54,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 252 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:03:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-11-26 01:03:54,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 868. [2022-11-26 01:03:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.5767012687427913) internal successors, (1367), 867 states have internal predecessors, (1367), 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) [2022-11-26 01:03:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1367 transitions. [2022-11-26 01:03:54,985 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1367 transitions. Word has length 51 [2022-11-26 01:03:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:54,988 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1367 transitions. [2022-11-26 01:03:54,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-26 01:03:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1367 transitions. [2022-11-26 01:03:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 01:03:54,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:54,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:55,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 01:03:55,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:55,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1196001752, now seen corresponding path program 1 times [2022-11-26 01:03:55,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:55,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703586112] [2022-11-26 01:03:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:55,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:55,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:55,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703586112] [2022-11-26 01:03:55,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703586112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:55,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:55,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:03:55,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425366664] [2022-11-26 01:03:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:55,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:03:55,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:55,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:03:55,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:55,176 INFO L87 Difference]: Start difference. First operand 868 states and 1367 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:55,388 INFO L93 Difference]: Finished difference Result 2175 states and 3463 transitions. [2022-11-26 01:03:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:03:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-26 01:03:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:55,397 INFO L225 Difference]: With dead ends: 2175 [2022-11-26 01:03:55,397 INFO L226 Difference]: Without dead ends: 1357 [2022-11-26 01:03:55,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:55,402 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 88 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:55,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 243 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:03:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-11-26 01:03:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1355. [2022-11-26 01:03:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 1.5834564254062038) internal successors, (2144), 1354 states have internal predecessors, (2144), 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) [2022-11-26 01:03:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 2144 transitions. [2022-11-26 01:03:55,619 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 2144 transitions. Word has length 53 [2022-11-26 01:03:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:55,620 INFO L495 AbstractCegarLoop]: Abstraction has 1355 states and 2144 transitions. [2022-11-26 01:03:55,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 2144 transitions. [2022-11-26 01:03:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 01:03:55,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:55,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:55,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 01:03:55,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:55,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:55,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1594004199, now seen corresponding path program 1 times [2022-11-26 01:03:55,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:55,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102317594] [2022-11-26 01:03:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:55,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:55,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:55,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102317594] [2022-11-26 01:03:55,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102317594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:55,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:55,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:03:55,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122406341] [2022-11-26 01:03:55,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:55,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:03:55,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:03:55,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:55,778 INFO L87 Difference]: Start difference. First operand 1355 states and 2144 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:56,352 INFO L93 Difference]: Finished difference Result 3443 states and 5471 transitions. [2022-11-26 01:03:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:03:56,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-26 01:03:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:56,363 INFO L225 Difference]: With dead ends: 3443 [2022-11-26 01:03:56,364 INFO L226 Difference]: Without dead ends: 2154 [2022-11-26 01:03:56,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:03:56,367 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 549 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:56,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 959 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:03:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-11-26 01:03:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2144. [2022-11-26 01:03:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 1.5762949136724218) internal successors, (3378), 2143 states have internal predecessors, (3378), 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) [2022-11-26 01:03:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3378 transitions. [2022-11-26 01:03:56,679 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3378 transitions. Word has length 55 [2022-11-26 01:03:56,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:56,679 INFO L495 AbstractCegarLoop]: Abstraction has 2144 states and 3378 transitions. [2022-11-26 01:03:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3378 transitions. [2022-11-26 01:03:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-26 01:03:56,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:56,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:56,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 01:03:56,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2062973210, now seen corresponding path program 1 times [2022-11-26 01:03:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:56,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371954429] [2022-11-26 01:03:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:56,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:56,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371954429] [2022-11-26 01:03:56,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371954429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:56,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:56,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:03:56,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125065640] [2022-11-26 01:03:56,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:56,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:03:56,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:56,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:03:56,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:03:56,868 INFO L87 Difference]: Start difference. First operand 2144 states and 3378 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:57,233 INFO L93 Difference]: Finished difference Result 4224 states and 6675 transitions. [2022-11-26 01:03:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:03:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-26 01:03:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:57,249 INFO L225 Difference]: With dead ends: 4224 [2022-11-26 01:03:57,249 INFO L226 Difference]: Without dead ends: 2146 [2022-11-26 01:03:57,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:57,256 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 182 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:57,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 347 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:03:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-11-26 01:03:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 2144. [2022-11-26 01:03:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 1.570695286980868) internal successors, (3366), 2143 states have internal predecessors, (3366), 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) [2022-11-26 01:03:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3366 transitions. [2022-11-26 01:03:57,534 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3366 transitions. Word has length 56 [2022-11-26 01:03:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:57,535 INFO L495 AbstractCegarLoop]: Abstraction has 2144 states and 3366 transitions. [2022-11-26 01:03:57,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3366 transitions. [2022-11-26 01:03:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 01:03:57,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:57,536 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] [2022-11-26 01:03:57,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 01:03:57,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:57,538 INFO L85 PathProgramCache]: Analyzing trace with hash -530286080, now seen corresponding path program 1 times [2022-11-26 01:03:57,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:57,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8202313] [2022-11-26 01:03:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:57,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:57,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:57,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8202313] [2022-11-26 01:03:57,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8202313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:57,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:57,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:03:57,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101067599] [2022-11-26 01:03:57,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:57,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:03:57,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:03:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:03:57,657 INFO L87 Difference]: Start difference. First operand 2144 states and 3366 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-26 01:03:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:57,980 INFO L93 Difference]: Finished difference Result 4224 states and 6651 transitions. [2022-11-26 01:03:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:03:57,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2022-11-26 01:03:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:57,991 INFO L225 Difference]: With dead ends: 4224 [2022-11-26 01:03:57,991 INFO L226 Difference]: Without dead ends: 2146 [2022-11-26 01:03:57,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:57,998 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 190 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:57,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 353 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:03:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-11-26 01:03:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 2144. [2022-11-26 01:03:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 1.565095660289314) internal successors, (3354), 2143 states have internal predecessors, (3354), 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) [2022-11-26 01:03:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3354 transitions. [2022-11-26 01:03:58,287 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3354 transitions. Word has length 57 [2022-11-26 01:03:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:58,287 INFO L495 AbstractCegarLoop]: Abstraction has 2144 states and 3354 transitions. [2022-11-26 01:03:58,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-26 01:03:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3354 transitions. [2022-11-26 01:03:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-26 01:03:58,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:58,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 01:03:58,289 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash 687612577, now seen corresponding path program 1 times [2022-11-26 01:03:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:58,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929325372] [2022-11-26 01:03:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:58,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:58,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929325372] [2022-11-26 01:03:58,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929325372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:58,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:58,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:03:58,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568447217] [2022-11-26 01:03:58,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:58,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:03:58,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:03:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:03:58,381 INFO L87 Difference]: Start difference. First operand 2144 states and 3354 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:58,801 INFO L93 Difference]: Finished difference Result 4224 states and 6627 transitions. [2022-11-26 01:03:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:03:58,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-26 01:03:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:58,812 INFO L225 Difference]: With dead ends: 4224 [2022-11-26 01:03:58,812 INFO L226 Difference]: Without dead ends: 2146 [2022-11-26 01:03:58,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:58,816 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 188 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:58,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 356 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:03:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-11-26 01:03:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 2144. [2022-11-26 01:03:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 1.5594960335977601) internal successors, (3342), 2143 states have internal predecessors, (3342), 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) [2022-11-26 01:03:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3342 transitions. [2022-11-26 01:03:59,137 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3342 transitions. Word has length 58 [2022-11-26 01:03:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:59,138 INFO L495 AbstractCegarLoop]: Abstraction has 2144 states and 3342 transitions. [2022-11-26 01:03:59,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3342 transitions. [2022-11-26 01:03:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 01:03:59,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:59,139 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] [2022-11-26 01:03:59,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 01:03:59,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2146587886, now seen corresponding path program 1 times [2022-11-26 01:03:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:59,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539822477] [2022-11-26 01:03:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:59,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:03:59,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:59,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539822477] [2022-11-26 01:03:59,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539822477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:59,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:59,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:03:59,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743381793] [2022-11-26 01:03:59,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:59,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:03:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:03:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:59,375 INFO L87 Difference]: Start difference. First operand 2144 states and 3342 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2022-11-26 01:03:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:59,822 INFO L93 Difference]: Finished difference Result 4224 states and 6603 transitions. [2022-11-26 01:03:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:03:59,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 60 [2022-11-26 01:03:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:59,832 INFO L225 Difference]: With dead ends: 4224 [2022-11-26 01:03:59,833 INFO L226 Difference]: Without dead ends: 2146 [2022-11-26 01:03:59,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:03:59,836 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 75 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:59,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 448 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:03:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-11-26 01:04:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 2144. [2022-11-26 01:04:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 1.5557629491367242) internal successors, (3334), 2143 states have internal predecessors, (3334), 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) [2022-11-26 01:04:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3334 transitions. [2022-11-26 01:04:00,211 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3334 transitions. Word has length 60 [2022-11-26 01:04:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:00,212 INFO L495 AbstractCegarLoop]: Abstraction has 2144 states and 3334 transitions. [2022-11-26 01:04:00,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2022-11-26 01:04:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3334 transitions. [2022-11-26 01:04:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 01:04:00,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:00,217 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] [2022-11-26 01:04:00,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 01:04:00,218 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1014792274, now seen corresponding path program 1 times [2022-11-26 01:04:00,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:00,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393513570] [2022-11-26 01:04:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:00,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:00,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393513570] [2022-11-26 01:04:00,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393513570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:00,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:00,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:04:00,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456834549] [2022-11-26 01:04:00,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:00,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:04:00,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:04:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:04:00,460 INFO L87 Difference]: Start difference. First operand 2144 states and 3334 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2022-11-26 01:04:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:01,180 INFO L93 Difference]: Finished difference Result 5396 states and 8389 transitions. [2022-11-26 01:04:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:04:01,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 63 [2022-11-26 01:04:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:01,196 INFO L225 Difference]: With dead ends: 5396 [2022-11-26 01:04:01,196 INFO L226 Difference]: Without dead ends: 3318 [2022-11-26 01:04:01,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:04:01,201 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 220 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:01,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 361 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:01,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-11-26 01:04:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 3316. [2022-11-26 01:04:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 1.5457013574660634) internal successors, (5124), 3315 states have internal predecessors, (5124), 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) [2022-11-26 01:04:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 5124 transitions. [2022-11-26 01:04:01,717 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 5124 transitions. Word has length 63 [2022-11-26 01:04:01,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:01,718 INFO L495 AbstractCegarLoop]: Abstraction has 3316 states and 5124 transitions. [2022-11-26 01:04:01,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2022-11-26 01:04:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 5124 transitions. [2022-11-26 01:04:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 01:04:01,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:01,722 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] [2022-11-26 01:04:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 01:04:01,722 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1405226511, now seen corresponding path program 1 times [2022-11-26 01:04:01,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:01,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288789132] [2022-11-26 01:04:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:01,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:02,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:02,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288789132] [2022-11-26 01:04:02,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288789132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:02,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:02,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:04:02,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739614062] [2022-11-26 01:04:02,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:02,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:04:02,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:02,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:04:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:04:02,114 INFO L87 Difference]: Start difference. First operand 3316 states and 5124 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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) [2022-11-26 01:04:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:02,905 INFO L93 Difference]: Finished difference Result 4050 states and 6223 transitions. [2022-11-26 01:04:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:04:02,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 64 [2022-11-26 01:04:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:02,923 INFO L225 Difference]: With dead ends: 4050 [2022-11-26 01:04:02,923 INFO L226 Difference]: Without dead ends: 4048 [2022-11-26 01:04:02,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:04:02,926 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 257 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:02,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 833 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2022-11-26 01:04:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3322. [2022-11-26 01:04:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3321 states have (on average 1.5429087624209576) internal successors, (5124), 3321 states have internal predecessors, (5124), 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) [2022-11-26 01:04:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5124 transitions. [2022-11-26 01:04:03,435 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5124 transitions. Word has length 64 [2022-11-26 01:04:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:03,435 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 5124 transitions. [2022-11-26 01:04:03,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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) [2022-11-26 01:04:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5124 transitions. [2022-11-26 01:04:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 01:04:03,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:03,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:03,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 01:04:03,438 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1587806638, now seen corresponding path program 1 times [2022-11-26 01:04:03,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:03,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217004931] [2022-11-26 01:04:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:05,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:05,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217004931] [2022-11-26 01:04:05,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217004931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:05,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430941314] [2022-11-26 01:04:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:05,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:05,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:05,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:04:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:05,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:04:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:04:06,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:06,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430941314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:06,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:06,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2022-11-26 01:04:06,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937355475] [2022-11-26 01:04:06,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:06,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:04:06,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:06,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:04:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:04:06,528 INFO L87 Difference]: Start difference. First operand 3322 states and 5124 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:08,197 INFO L93 Difference]: Finished difference Result 9611 states and 14848 transitions. [2022-11-26 01:04:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:04:08,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-26 01:04:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:08,237 INFO L225 Difference]: With dead ends: 9611 [2022-11-26 01:04:08,237 INFO L226 Difference]: Without dead ends: 6352 [2022-11-26 01:04:08,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-11-26 01:04:08,243 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 321 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:08,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 334 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:04:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6352 states. [2022-11-26 01:04:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6352 to 6350. [2022-11-26 01:04:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6350 states, 6349 states have (on average 1.5364624350291385) internal successors, (9755), 6349 states have internal predecessors, (9755), 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) [2022-11-26 01:04:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6350 states to 6350 states and 9755 transitions. [2022-11-26 01:04:09,485 INFO L78 Accepts]: Start accepts. Automaton has 6350 states and 9755 transitions. Word has length 74 [2022-11-26 01:04:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:09,485 INFO L495 AbstractCegarLoop]: Abstraction has 6350 states and 9755 transitions. [2022-11-26 01:04:09,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 6350 states and 9755 transitions. [2022-11-26 01:04:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 01:04:09,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:09,488 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:09,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:09,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 01:04:09,702 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:09,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1520415030, now seen corresponding path program 1 times [2022-11-26 01:04:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:09,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137128122] [2022-11-26 01:04:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:09,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:04:09,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:09,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137128122] [2022-11-26 01:04:09,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137128122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:09,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:09,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:04:09,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917185177] [2022-11-26 01:04:09,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:09,802 INFO L87 Difference]: Start difference. First operand 6350 states and 9755 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:11,631 INFO L93 Difference]: Finished difference Result 14886 states and 22955 transitions. [2022-11-26 01:04:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:11,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-26 01:04:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:11,653 INFO L225 Difference]: With dead ends: 14886 [2022-11-26 01:04:11,653 INFO L226 Difference]: Without dead ends: 8594 [2022-11-26 01:04:11,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:11,664 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 91 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:11,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 257 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8594 states. [2022-11-26 01:04:12,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8594 to 8592. [2022-11-26 01:04:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8591 states have (on average 1.5282272145268303) internal successors, (13129), 8591 states have internal predecessors, (13129), 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) [2022-11-26 01:04:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 13129 transitions. [2022-11-26 01:04:13,015 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 13129 transitions. Word has length 75 [2022-11-26 01:04:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:13,015 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 13129 transitions. [2022-11-26 01:04:13,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 13129 transitions. [2022-11-26 01:04:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 01:04:13,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:13,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:13,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 01:04:13,018 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:13,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1253184500, now seen corresponding path program 1 times [2022-11-26 01:04:13,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:13,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196110796] [2022-11-26 01:04:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:04:13,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:13,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196110796] [2022-11-26 01:04:13,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196110796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:13,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:13,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:04:13,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669662774] [2022-11-26 01:04:13,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:13,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:04:13,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:04:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:04:13,225 INFO L87 Difference]: Start difference. First operand 8592 states and 13129 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2022-11-26 01:04:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:15,201 INFO L93 Difference]: Finished difference Result 17128 states and 26191 transitions. [2022-11-26 01:04:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:04:15,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 78 [2022-11-26 01:04:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:15,228 INFO L225 Difference]: With dead ends: 17128 [2022-11-26 01:04:15,229 INFO L226 Difference]: Without dead ends: 8592 [2022-11-26 01:04:15,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:15,240 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 336 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:15,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 122 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8592 states. [2022-11-26 01:04:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8592 to 8592. [2022-11-26 01:04:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8591 states have (on average 1.511931090676289) internal successors, (12989), 8591 states have internal predecessors, (12989), 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) [2022-11-26 01:04:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12989 transitions. [2022-11-26 01:04:16,512 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12989 transitions. Word has length 78 [2022-11-26 01:04:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:16,512 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12989 transitions. [2022-11-26 01:04:16,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2022-11-26 01:04:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12989 transitions. [2022-11-26 01:04:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 01:04:16,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:16,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:16,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 01:04:16,515 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:16,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1878446745, now seen corresponding path program 1 times [2022-11-26 01:04:16,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:16,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430576172] [2022-11-26 01:04:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:16,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:04:17,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:17,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430576172] [2022-11-26 01:04:17,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430576172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:17,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924696055] [2022-11-26 01:04:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:17,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:17,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:17,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:04:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:04:17,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:04:18,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:18,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924696055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:18,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:18,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-26 01:04:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611345338] [2022-11-26 01:04:18,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:04:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:04:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:04:18,482 INFO L87 Difference]: Start difference. First operand 8592 states and 12989 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:22,053 INFO L93 Difference]: Finished difference Result 24863 states and 37547 transitions. [2022-11-26 01:04:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:04:22,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-26 01:04:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:22,179 INFO L225 Difference]: With dead ends: 24863 [2022-11-26 01:04:22,180 INFO L226 Difference]: Without dead ends: 16318 [2022-11-26 01:04:22,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:04:22,193 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 324 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 326 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16318 states. [2022-11-26 01:04:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16318 to 16316. [2022-11-26 01:04:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16316 states, 16315 states have (on average 1.4984370211461846) internal successors, (24447), 16315 states have internal predecessors, (24447), 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) [2022-11-26 01:04:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16316 states to 16316 states and 24447 transitions. [2022-11-26 01:04:25,486 INFO L78 Accepts]: Start accepts. Automaton has 16316 states and 24447 transitions. Word has length 78 [2022-11-26 01:04:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:25,486 INFO L495 AbstractCegarLoop]: Abstraction has 16316 states and 24447 transitions. [2022-11-26 01:04:25,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 16316 states and 24447 transitions. [2022-11-26 01:04:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 01:04:25,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:25,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:25,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:25,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:25,696 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1732924701, now seen corresponding path program 1 times [2022-11-26 01:04:25,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:25,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443655574] [2022-11-26 01:04:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:25,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:04:25,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443655574] [2022-11-26 01:04:25,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443655574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:25,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:25,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:04:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474345515] [2022-11-26 01:04:25,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:25,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:25,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:25,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:25,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:25,864 INFO L87 Difference]: Start difference. First operand 16316 states and 24447 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2022-11-26 01:04:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:30,961 INFO L93 Difference]: Finished difference Result 39544 states and 59605 transitions. [2022-11-26 01:04:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 79 [2022-11-26 01:04:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:31,024 INFO L225 Difference]: With dead ends: 39544 [2022-11-26 01:04:31,024 INFO L226 Difference]: Without dead ends: 23270 [2022-11-26 01:04:31,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:31,042 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 95 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:31,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 254 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:04:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23270 states. [2022-11-26 01:04:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23270 to 23268. [2022-11-26 01:04:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23268 states, 23267 states have (on average 1.4917694588902737) internal successors, (34709), 23267 states have internal predecessors, (34709), 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) [2022-11-26 01:04:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23268 states to 23268 states and 34709 transitions. [2022-11-26 01:04:36,208 INFO L78 Accepts]: Start accepts. Automaton has 23268 states and 34709 transitions. Word has length 79 [2022-11-26 01:04:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:36,209 INFO L495 AbstractCegarLoop]: Abstraction has 23268 states and 34709 transitions. [2022-11-26 01:04:36,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2022-11-26 01:04:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 23268 states and 34709 transitions. [2022-11-26 01:04:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 01:04:36,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:36,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:36,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 01:04:36,212 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1736615356, now seen corresponding path program 1 times [2022-11-26 01:04:36,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064791957] [2022-11-26 01:04:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:36,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:37,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:37,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064791957] [2022-11-26 01:04:37,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064791957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:37,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545385383] [2022-11-26 01:04:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:37,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:37,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:37,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:37,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:04:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:38,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:04:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:04:38,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:38,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545385383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:38,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:38,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2022-11-26 01:04:38,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680380934] [2022-11-26 01:04:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:38,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:04:38,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:38,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:04:38,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:04:38,909 INFO L87 Difference]: Start difference. First operand 23268 states and 34709 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:49,385 INFO L93 Difference]: Finished difference Result 68056 states and 101415 transitions. [2022-11-26 01:04:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:04:49,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-26 01:04:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:49,494 INFO L225 Difference]: With dead ends: 68056 [2022-11-26 01:04:49,495 INFO L226 Difference]: Without dead ends: 44882 [2022-11-26 01:04:49,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-11-26 01:04:49,522 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 299 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:49,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 328 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:04:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44882 states. [2022-11-26 01:04:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44882 to 44880. [2022-11-26 01:04:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44880 states, 44879 states have (on average 1.481784353483812) internal successors, (66501), 44879 states have internal predecessors, (66501), 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) [2022-11-26 01:04:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44880 states to 44880 states and 66501 transitions. [2022-11-26 01:04:59,326 INFO L78 Accepts]: Start accepts. Automaton has 44880 states and 66501 transitions. Word has length 82 [2022-11-26 01:04:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:59,326 INFO L495 AbstractCegarLoop]: Abstraction has 44880 states and 66501 transitions. [2022-11-26 01:04:59,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:04:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 44880 states and 66501 transitions. [2022-11-26 01:04:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-26 01:04:59,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:59,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:59,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:59,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9113da6-f058-44af-85e7-50c026ac61ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:59,536 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:59,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2086087252, now seen corresponding path program 1 times [2022-11-26 01:04:59,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:59,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893122714] [2022-11-26 01:04:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:59,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:04:59,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:59,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893122714] [2022-11-26 01:04:59,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893122714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:59,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:59,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:04:59,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240243707] [2022-11-26 01:04:59,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:59,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:59,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:59,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:59,634 INFO L87 Difference]: Start difference. First operand 44880 states and 66501 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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)