./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74af1dedb866c1cce8309a0a9038778cf2a5022a8ca1e36436d718ac447379c8 --- 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-dbf71c6-m [2022-10-17 10:20:36,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:20:36,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:20:36,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:20:36,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:20:36,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:20:36,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:20:36,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:20:36,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:20:36,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:20:36,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:20:36,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:20:36,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:20:36,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:20:36,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:20:36,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:20:36,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:20:36,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:20:36,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:20:36,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:20:36,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:20:36,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:20:36,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:20:36,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:20:36,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:20:36,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:20:36,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:20:37,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:20:37,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:20:37,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:20:37,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:20:37,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:20:37,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:20:37,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:20:37,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:20:37,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:20:37,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:20:37,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:20:37,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:20:37,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:20:37,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:20:37,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:20:37,049 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:20:37,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:20:37,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:20:37,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:20:37,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:20:37,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:20:37,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:20:37,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:20:37,054 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:20:37,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:20:37,054 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:20:37,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:20:37,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:20:37,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:20:37,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:20:37,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:20:37,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:20:37,075 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:20:37,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:20:37,075 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:20:37,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:20:37,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:20:37,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:20:37,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:20:37,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:20:37,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:20:37,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:20:37,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:20:37,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:20:37,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:20:37,079 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:20:37,079 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:20:37,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:20:37,079 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_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74af1dedb866c1cce8309a0a9038778cf2a5022a8ca1e36436d718ac447379c8 [2022-10-17 10:20:37,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:20:37,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:20:37,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:20:37,441 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:20:37,442 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:20:37,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-10-17 10:20:37,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/data/71e39f1dd/b0ba632be7b64cd08658a7432fc742f8/FLAG9f8965bbf [2022-10-17 10:20:38,220 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:20:38,221 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-10-17 10:20:38,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/data/71e39f1dd/b0ba632be7b64cd08658a7432fc742f8/FLAG9f8965bbf [2022-10-17 10:20:38,438 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/data/71e39f1dd/b0ba632be7b64cd08658a7432fc742f8 [2022-10-17 10:20:38,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:20:38,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:20:38,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:20:38,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:20:38,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:20:38,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:20:38" (1/1) ... [2022-10-17 10:20:38,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6960d834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:38, skipping insertion in model container [2022-10-17 10:20:38,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:20:38" (1/1) ... [2022-10-17 10:20:38,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:20:38,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:20:38,954 WARN L230 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_ce02210a-9f3b-402c-b6a1-a619d0a3697c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2022-10-17 10:20:39,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:20:39,093 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:20:39,232 WARN L230 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_ce02210a-9f3b-402c-b6a1-a619d0a3697c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2022-10-17 10:20:39,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:20:39,331 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:20:39,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39 WrapperNode [2022-10-17 10:20:39,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:20:39,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:20:39,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:20:39,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:20:39,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,479 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1297 [2022-10-17 10:20:39,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:20:39,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:20:39,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:20:39,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:20:39,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:20:39,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:20:39,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:20:39,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:20:39,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (1/1) ... [2022-10-17 10:20:39,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:20:39,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:39,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:20:39,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce02210a-9f3b-402c-b6a1-a619d0a3697c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:20:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:20:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:20:39,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:20:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:20:39,971 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:20:39,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:20:41,446 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:20:41,471 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:20:41,471 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 10:20:41,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:20:41 BoogieIcfgContainer [2022-10-17 10:20:41,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:20:41,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:20:41,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:20:41,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:20:41,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:20:38" (1/3) ... [2022-10-17 10:20:41,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c9fac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:20:41, skipping insertion in model container [2022-10-17 10:20:41,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:39" (2/3) ... [2022-10-17 10:20:41,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c9fac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:20:41, skipping insertion in model container [2022-10-17 10:20:41,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:20:41" (3/3) ... [2022-10-17 10:20:41,489 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-10-17 10:20:41,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:20:41,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:20:41,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:20:41,613 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=PETRI_NET, 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;@5b24469f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:20:41,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:20:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 326 states, 324 states have (on average 1.7962962962962963) internal successors, (582), 325 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-10-17 10:20:41,663 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:41,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:41,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:41,675 INFO L85 PathProgramCache]: Analyzing trace with hash 430105228, now seen corresponding path program 1 times [2022-10-17 10:20:41,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:41,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702148589] [2022-10-17 10:20:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:41,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:42,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:42,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702148589] [2022-10-17 10:20:42,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702148589] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:42,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:42,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:20:42,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343556272] [2022-10-17 10:20:42,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:42,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:20:42,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:20:42,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:42,623 INFO L87 Difference]: Start difference. First operand has 326 states, 324 states have (on average 1.7962962962962963) internal successors, (582), 325 states have internal predecessors, (582), 0 states have call successors, (0), 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 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:42,854 INFO L93 Difference]: Finished difference Result 589 states and 1021 transitions. [2022-10-17 10:20:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:20:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-10-17 10:20:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:42,890 INFO L225 Difference]: With dead ends: 589 [2022-10-17 10:20:42,891 INFO L226 Difference]: Without dead ends: 446 [2022-10-17 10:20:42,897 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 [2022-10-17 10:20:42,902 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 232 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:42,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1074 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:20:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-10-17 10:20:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2022-10-17 10:20:43,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.660633484162896) internal successors, (734), 442 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 734 transitions. [2022-10-17 10:20:43,008 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 734 transitions. Word has length 110 [2022-10-17 10:20:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:43,009 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 734 transitions. [2022-10-17 10:20:43,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:43,010 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 734 transitions. [2022-10-17 10:20:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-10-17 10:20:43,016 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:43,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:43,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:20:43,017 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:43,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:43,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1228540371, now seen corresponding path program 1 times [2022-10-17 10:20:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:43,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835190029] [2022-10-17 10:20:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:43,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:43,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835190029] [2022-10-17 10:20:43,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835190029] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:43,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:43,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:20:43,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151206668] [2022-10-17 10:20:43,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:43,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:20:43,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:20:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:43,321 INFO L87 Difference]: Start difference. First operand 443 states and 734 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:43,459 INFO L93 Difference]: Finished difference Result 933 states and 1550 transitions. [2022-10-17 10:20:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:20:43,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2022-10-17 10:20:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:43,471 INFO L225 Difference]: With dead ends: 933 [2022-10-17 10:20:43,471 INFO L226 Difference]: Without dead ends: 679 [2022-10-17 10:20:43,477 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 [2022-10-17 10:20:43,479 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 200 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:43,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1028 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:20:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-10-17 10:20:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 675. [2022-10-17 10:20:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.6587537091988132) internal successors, (1118), 674 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1118 transitions. [2022-10-17 10:20:43,560 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1118 transitions. Word has length 113 [2022-10-17 10:20:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:43,561 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 1118 transitions. [2022-10-17 10:20:43,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1118 transitions. [2022-10-17 10:20:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-10-17 10:20:43,566 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:43,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:20:43,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1403707664, now seen corresponding path program 1 times [2022-10-17 10:20:43,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:43,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880362229] [2022-10-17 10:20:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:43,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:43,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:43,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880362229] [2022-10-17 10:20:43,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880362229] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:43,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:43,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:20:43,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878699679] [2022-10-17 10:20:43,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:43,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:20:43,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:43,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:20:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:43,811 INFO L87 Difference]: Start difference. First operand 675 states and 1118 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:43,950 INFO L93 Difference]: Finished difference Result 1611 states and 2668 transitions. [2022-10-17 10:20:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:20:43,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-10-17 10:20:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:43,960 INFO L225 Difference]: With dead ends: 1611 [2022-10-17 10:20:43,960 INFO L226 Difference]: Without dead ends: 1125 [2022-10-17 10:20:43,962 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 [2022-10-17 10:20:43,963 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 194 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:43,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1029 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:20:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-10-17 10:20:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1119. [2022-10-17 10:20:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.6511627906976745) internal successors, (1846), 1118 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1846 transitions. [2022-10-17 10:20:44,068 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1846 transitions. Word has length 116 [2022-10-17 10:20:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:44,069 INFO L495 AbstractCegarLoop]: Abstraction has 1119 states and 1846 transitions. [2022-10-17 10:20:44,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1846 transitions. [2022-10-17 10:20:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-10-17 10:20:44,072 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:44,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:44,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:20:44,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:44,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1658128561, now seen corresponding path program 1 times [2022-10-17 10:20:44,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:44,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511215517] [2022-10-17 10:20:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:44,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:44,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:44,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511215517] [2022-10-17 10:20:44,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511215517] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:44,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:44,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:20:44,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747113355] [2022-10-17 10:20:44,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:44,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:20:44,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:20:44,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:44,281 INFO L87 Difference]: Start difference. First operand 1119 states and 1846 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:44,526 INFO L93 Difference]: Finished difference Result 2907 states and 4784 transitions. [2022-10-17 10:20:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:20:44,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2022-10-17 10:20:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:44,545 INFO L225 Difference]: With dead ends: 2907 [2022-10-17 10:20:44,545 INFO L226 Difference]: Without dead ends: 1977 [2022-10-17 10:20:44,550 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 [2022-10-17 10:20:44,560 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 188 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:44,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1030 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:20:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2022-10-17 10:20:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1967. [2022-10-17 10:20:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 1.6388606307222788) internal successors, (3222), 1966 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3222 transitions. [2022-10-17 10:20:44,806 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3222 transitions. Word has length 119 [2022-10-17 10:20:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:44,807 INFO L495 AbstractCegarLoop]: Abstraction has 1967 states and 3222 transitions. [2022-10-17 10:20:44,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3222 transitions. [2022-10-17 10:20:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-10-17 10:20:44,814 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:44,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:20:44,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1735235476, now seen corresponding path program 1 times [2022-10-17 10:20:44,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:44,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126034182] [2022-10-17 10:20:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:44,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:45,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126034182] [2022-10-17 10:20:45,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126034182] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:45,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:45,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:20:45,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389252307] [2022-10-17 10:20:45,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:45,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:20:45,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:45,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:20:45,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:20:45,141 INFO L87 Difference]: Start difference. First operand 1967 states and 3222 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:46,435 INFO L93 Difference]: Finished difference Result 10223 states and 16898 transitions. [2022-10-17 10:20:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:20:46,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2022-10-17 10:20:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:46,497 INFO L225 Difference]: With dead ends: 10223 [2022-10-17 10:20:46,497 INFO L226 Difference]: Without dead ends: 8445 [2022-10-17 10:20:46,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:20:46,504 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 2053 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2053 SdHoareTripleChecker+Valid, 3989 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:46,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2053 Valid, 3989 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:20:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8445 states. [2022-10-17 10:20:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8445 to 3625. [2022-10-17 10:20:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 1.6382450331125828) internal successors, (5937), 3624 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 5937 transitions. [2022-10-17 10:20:47,139 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 5937 transitions. Word has length 122 [2022-10-17 10:20:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:47,140 INFO L495 AbstractCegarLoop]: Abstraction has 3625 states and 5937 transitions. [2022-10-17 10:20:47,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 5937 transitions. [2022-10-17 10:20:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-10-17 10:20:47,149 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:47,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:47,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:20:47,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2109337106, now seen corresponding path program 1 times [2022-10-17 10:20:47,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:47,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951631744] [2022-10-17 10:20:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:47,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:47,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:47,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951631744] [2022-10-17 10:20:47,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951631744] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:47,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:47,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:20:47,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259587739] [2022-10-17 10:20:47,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:20:47,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:47,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:20:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:20:47,357 INFO L87 Difference]: Start difference. First operand 3625 states and 5937 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:48,516 INFO L93 Difference]: Finished difference Result 10605 states and 17475 transitions. [2022-10-17 10:20:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:20:48,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-10-17 10:20:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:48,567 INFO L225 Difference]: With dead ends: 10605 [2022-10-17 10:20:48,568 INFO L226 Difference]: Without dead ends: 7169 [2022-10-17 10:20:48,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:20:48,576 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 658 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:48,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 1605 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:20:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7169 states. [2022-10-17 10:20:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7169 to 5380. [2022-10-17 10:20:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 1.6417549730433165) internal successors, (8831), 5379 states have internal predecessors, (8831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 8831 transitions. [2022-10-17 10:20:49,548 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 8831 transitions. Word has length 123 [2022-10-17 10:20:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:49,549 INFO L495 AbstractCegarLoop]: Abstraction has 5380 states and 8831 transitions. [2022-10-17 10:20:49,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 8831 transitions. [2022-10-17 10:20:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-10-17 10:20:49,554 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:49,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:49,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:20:49,555 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1027444837, now seen corresponding path program 1 times [2022-10-17 10:20:49,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687242819] [2022-10-17 10:20:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:49,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:49,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687242819] [2022-10-17 10:20:49,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687242819] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:49,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:49,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:20:49,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220481387] [2022-10-17 10:20:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:20:49,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:20:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:20:49,754 INFO L87 Difference]: Start difference. First operand 5380 states and 8831 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:51,384 INFO L93 Difference]: Finished difference Result 15777 states and 25981 transitions. [2022-10-17 10:20:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:20:51,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-10-17 10:20:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:51,458 INFO L225 Difference]: With dead ends: 15777 [2022-10-17 10:20:51,459 INFO L226 Difference]: Without dead ends: 10586 [2022-10-17 10:20:51,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:20:51,472 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 656 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:51,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1657 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:20:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2022-10-17 10:20:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 7959. [2022-10-17 10:20:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 1.6406132194018597) internal successors, (13056), 7958 states have internal predecessors, (13056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 13056 transitions. [2022-10-17 10:20:53,026 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 13056 transitions. Word has length 124 [2022-10-17 10:20:53,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:53,026 INFO L495 AbstractCegarLoop]: Abstraction has 7959 states and 13056 transitions. [2022-10-17 10:20:53,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 13056 transitions. [2022-10-17 10:20:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-10-17 10:20:53,034 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:53,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:53,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:20:53,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash -275676370, now seen corresponding path program 1 times [2022-10-17 10:20:53,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:53,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50753132] [2022-10-17 10:20:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:53,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:53,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:53,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50753132] [2022-10-17 10:20:53,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50753132] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:53,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:53,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:20:53,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601691601] [2022-10-17 10:20:53,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:53,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:20:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:20:53,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:53,274 INFO L87 Difference]: Start difference. First operand 7959 states and 13056 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:54,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:54,726 INFO L93 Difference]: Finished difference Result 15656 states and 25739 transitions. [2022-10-17 10:20:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:20:54,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2022-10-17 10:20:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:54,757 INFO L225 Difference]: With dead ends: 15656 [2022-10-17 10:20:54,758 INFO L226 Difference]: Without dead ends: 11380 [2022-10-17 10:20:54,768 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 [2022-10-17 10:20:54,769 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 193 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:54,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1120 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:20:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11380 states. [2022-10-17 10:20:56,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11380 to 11378. [2022-10-17 10:20:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11378 states, 11377 states have (on average 1.6374263865693943) internal successors, (18629), 11377 states have internal predecessors, (18629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11378 states to 11378 states and 18629 transitions. [2022-10-17 10:20:56,476 INFO L78 Accepts]: Start accepts. Automaton has 11378 states and 18629 transitions. Word has length 125 [2022-10-17 10:20:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:56,477 INFO L495 AbstractCegarLoop]: Abstraction has 11378 states and 18629 transitions. [2022-10-17 10:20:56,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 11378 states and 18629 transitions. [2022-10-17 10:20:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-10-17 10:20:56,482 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:56,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:56,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:20:56,483 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash 15369622, now seen corresponding path program 1 times [2022-10-17 10:20:56,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:56,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452510676] [2022-10-17 10:20:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:56,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:56,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452510676] [2022-10-17 10:20:56,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452510676] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:56,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:20:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534655101] [2022-10-17 10:20:56,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:56,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:20:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:56,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:20:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:56,610 INFO L87 Difference]: Start difference. First operand 11378 states and 18629 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:59,127 INFO L93 Difference]: Finished difference Result 22088 states and 36263 transitions. [2022-10-17 10:20:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:20:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2022-10-17 10:20:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:59,172 INFO L225 Difference]: With dead ends: 22088 [2022-10-17 10:20:59,172 INFO L226 Difference]: Without dead ends: 16096 [2022-10-17 10:20:59,185 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 [2022-10-17 10:20:59,186 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 187 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:59,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1094 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:20:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16096 states. [2022-10-17 10:21:00,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16096 to 16094. [2022-10-17 10:21:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16093 states have (on average 1.6340645000932081) internal successors, (26297), 16093 states have internal predecessors, (26297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:21:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 26297 transitions. [2022-10-17 10:21:00,859 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 26297 transitions. Word has length 125 [2022-10-17 10:21:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:21:00,859 INFO L495 AbstractCegarLoop]: Abstraction has 16094 states and 26297 transitions. [2022-10-17 10:21:00,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:21:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 26297 transitions. [2022-10-17 10:21:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-10-17 10:21:00,864 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:21:00,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:21:00,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:21:00,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:21:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:21:00,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1843964843, now seen corresponding path program 1 times [2022-10-17 10:21:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:21:00,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919635836] [2022-10-17 10:21:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:21:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:21:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:21:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:21:01,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:21:01,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919635836] [2022-10-17 10:21:01,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919635836] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:21:01,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:21:01,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:21:01,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728442702] [2022-10-17 10:21:01,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:21:01,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:21:01,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:21:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:21:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:21:01,053 INFO L87 Difference]: Start difference. First operand 16094 states and 26297 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:21:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:21:05,553 INFO L93 Difference]: Finished difference Result 50960 states and 83572 transitions. [2022-10-17 10:21:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:21:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2022-10-17 10:21:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:21:05,679 INFO L225 Difference]: With dead ends: 50960 [2022-10-17 10:21:05,680 INFO L226 Difference]: Without dead ends: 35474 [2022-10-17 10:21:05,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:21:05,718 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 654 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:21:05,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1550 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:21:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35474 states.