./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1bcb2f3f5be6f9c47f1432334b844bf6563333b140bd48b23d7fc79eb421410 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:34,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:34,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:34,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:34,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:34,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:34,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:34,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:34,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:34,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:34,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:34,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:34,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:34,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:34,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:34,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:34,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:34,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:34,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:34,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:34,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:34,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:34,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:34,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:34,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:34,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:34,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:34,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:34,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:34,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:34,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:34,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:34,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:34,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:34,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:34,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:34,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:34,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:35,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:35,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:35,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:35,002 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:45:35,028 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:35,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:35,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:35,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:35,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:35,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:35,029 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:35,030 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:35,030 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:35,030 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:35,030 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:35,030 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:35,031 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:35,031 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:35,031 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:35,031 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:35,031 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:35,032 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:35,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:35,033 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:35,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:35,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:35,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:35,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:35,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:35,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:35,034 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:35,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:35,034 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:35,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:35,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:35,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:35,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:35,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:35,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:35,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:35,036 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:35,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:35,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:35,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:35,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:35,037 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1bcb2f3f5be6f9c47f1432334b844bf6563333b140bd48b23d7fc79eb421410 [2021-11-23 16:45:35,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:35,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:35,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:35,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:35,319 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:35,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2021-11-23 16:45:35,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data/a123c8ddb/928202574960427aa41614fb0efd5d90/FLAG908dd2707 [2021-11-23 16:45:36,034 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:36,034 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2021-11-23 16:45:36,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data/a123c8ddb/928202574960427aa41614fb0efd5d90/FLAG908dd2707 [2021-11-23 16:45:36,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data/a123c8ddb/928202574960427aa41614fb0efd5d90 [2021-11-23 16:45:36,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:36,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:36,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:36,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:36,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:36,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:36,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c676ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36, skipping insertion in model container [2021-11-23 16:45:36,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:36,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:36,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:36,890 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_b7751edf-1472-474d-b870-fe048ca2bb9f/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c[60917,60930] [2021-11-23 16:45:36,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:36,907 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:37,046 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_b7751edf-1472-474d-b870-fe048ca2bb9f/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c[60917,60930] [2021-11-23 16:45:37,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:37,071 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:37,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37 WrapperNode [2021-11-23 16:45:37,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:37,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:37,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:37,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:37,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,237 INFO L137 Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2051 [2021-11-23 16:45:37,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:37,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:37,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:37,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:37,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:37,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:37,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:37,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:37,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:37" (1/1) ... [2021-11-23 16:45:37,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:37,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:37,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:37,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:37,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:37,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:45:37,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:37,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:37,722 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:37,723 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:39,592 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:39,717 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:45:39,721 INFO L158 Benchmark]: Toolchain (without parser) took 3437.13ms. Allocated memory was 111.1MB in the beginning and 148.9MB in the end (delta: 37.7MB). Free memory was 75.5MB in the beginning and 98.1MB in the end (delta: -22.6MB). Peak memory consumption was 56.9MB. Max. memory is 16.1GB. [2021-11-23 16:45:39,722 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 86.0MB. Free memory is still 44.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:45:39,722 INFO L158 Benchmark]: CACSL2BoogieTranslator took 785.28ms. Allocated memory is still 111.1MB. Free memory was 75.3MB in the beginning and 61.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 16:45:39,723 INFO L158 Benchmark]: Boogie Procedure Inliner took 160.73ms. Allocated memory is still 111.1MB. Free memory was 61.9MB in the beginning and 53.6MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:45:39,724 INFO L158 Benchmark]: Boogie Preprocessor took 128.26ms. Allocated memory is still 111.1MB. Free memory was 53.6MB in the beginning and 46.2MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:45:39,725 INFO L158 Benchmark]: RCFGBuilder took 2350.05ms. Allocated memory was 111.1MB in the beginning and 148.9MB in the end (delta: 37.7MB). Free memory was 45.7MB in the beginning and 98.1MB in the end (delta: -52.4MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. [2021-11-23 16:45:39,728 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 86.0MB. Free memory is still 44.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 785.28ms. Allocated memory is still 111.1MB. Free memory was 75.3MB in the beginning and 61.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 160.73ms. Allocated memory is still 111.1MB. Free memory was 61.9MB in the beginning and 53.6MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 128.26ms. Allocated memory is still 111.1MB. Free memory was 53.6MB in the beginning and 46.2MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 2350.05ms. Allocated memory was 111.1MB in the beginning and 148.9MB in the end (delta: 37.7MB). Free memory was 45.7MB in the beginning and 98.1MB in the end (delta: -52.4MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:45:39,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1bcb2f3f5be6f9c47f1432334b844bf6563333b140bd48b23d7fc79eb421410 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:42,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:42,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:42,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:42,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:42,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:42,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:42,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:42,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:42,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:42,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:42,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:42,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:42,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:42,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:42,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:42,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:42,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:42,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:42,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:42,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:42,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:42,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:42,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:42,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:42,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:42,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:42,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:42,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:42,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:42,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:42,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:42,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:42,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:42,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:42,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:42,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:42,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:42,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:42,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:42,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:42,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:42,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:42,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:42,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:42,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:42,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:42,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:42,484 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:42,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:42,485 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:42,485 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:42,486 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:42,487 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:42,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:42,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:42,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:42,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:42,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:42,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:42,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:42,490 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:42,490 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:42,491 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:42,491 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:42,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:42,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:42,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:42,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:42,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:42,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:42,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:42,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:42,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:42,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:42,494 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:42,494 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:42,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:42,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:42,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:42,496 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1bcb2f3f5be6f9c47f1432334b844bf6563333b140bd48b23d7fc79eb421410 [2021-11-23 16:45:42,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:42,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:42,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:42,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:42,887 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:42,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2021-11-23 16:45:42,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data/d51a2ef42/41811ecdd5ee4904a5134fda040895a0/FLAG7820de88f [2021-11-23 16:45:43,761 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:43,761 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2021-11-23 16:45:43,778 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data/d51a2ef42/41811ecdd5ee4904a5134fda040895a0/FLAG7820de88f [2021-11-23 16:45:43,986 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/data/d51a2ef42/41811ecdd5ee4904a5134fda040895a0 [2021-11-23 16:45:43,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:43,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:43,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:43,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:43,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:44,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:43" (1/1) ... [2021-11-23 16:45:44,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b077e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44, skipping insertion in model container [2021-11-23 16:45:44,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:43" (1/1) ... [2021-11-23 16:45:44,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:44,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:44,561 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_b7751edf-1472-474d-b870-fe048ca2bb9f/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c[60917,60930] [2021-11-23 16:45:44,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:44,582 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:44,797 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_b7751edf-1472-474d-b870-fe048ca2bb9f/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c[60917,60930] [2021-11-23 16:45:44,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:44,821 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:44,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44 WrapperNode [2021-11-23 16:45:44,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:44,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:44,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:44,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:44,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:44,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:44,959 INFO L137 Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2019 [2021-11-23 16:45:44,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:44,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:44,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:44,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:44,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:44,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:44,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:44,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:45,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:45,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:45,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:45,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:45,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:45,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:45,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:45,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (1/1) ... [2021-11-23 16:45:45,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:45,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:45,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:45:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:45,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:45,445 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:45,447 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:47,167 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:47,193 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:45:47,193 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:45:47,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:47 BoogieIcfgContainer [2021-11-23 16:45:47,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:45:47,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:45:47,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:45:47,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:45:47,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:43" (1/3) ... [2021-11-23 16:45:47,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7644ee69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:47, skipping insertion in model container [2021-11-23 16:45:47,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:44" (2/3) ... [2021-11-23 16:45:47,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7644ee69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:47, skipping insertion in model container [2021-11-23 16:45:47,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:47" (3/3) ... [2021-11-23 16:45:47,208 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2021-11-23 16:45:47,213 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:45:47,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:45:47,288 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:45:47,295 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:45:47,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:45:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 706 states, 704 states have (on average 1.8508522727272727) internal successors, (1303), 705 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 16:45:47,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:47,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:47,368 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:47,373 INFO L85 PathProgramCache]: Analyzing trace with hash -745157910, now seen corresponding path program 1 times [2021-11-23 16:45:47,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:47,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121865669] [2021-11-23 16:45:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:47,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:47,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:47,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:47,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:45:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 16:45:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:48,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:48,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121865669] [2021-11-23 16:45:48,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121865669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:48,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:48,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:48,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011879651] [2021-11-23 16:45:48,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:48,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 16:45:48,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 16:45:48,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:45:48,190 INFO L87 Difference]: Start difference. First operand has 706 states, 704 states have (on average 1.8508522727272727) internal successors, (1303), 705 states have internal predecessors, (1303), 0 states have call successors, (0), 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 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:48,297 INFO L93 Difference]: Finished difference Result 867 states and 1580 transitions. [2021-11-23 16:45:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 16:45:48,299 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-11-23 16:45:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:48,328 INFO L225 Difference]: With dead ends: 867 [2021-11-23 16:45:48,328 INFO L226 Difference]: Without dead ends: 702 [2021-11-23 16:45:48,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:45:48,343 INFO L933 BasicCegarLoop]: 1300 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:48,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:45:48,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-23 16:45:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2021-11-23 16:45:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.848787446504993) internal successors, (1296), 701 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1296 transitions. [2021-11-23 16:45:48,471 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1296 transitions. Word has length 153 [2021-11-23 16:45:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:48,474 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1296 transitions. [2021-11-23 16:45:48,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1296 transitions. [2021-11-23 16:45:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 16:45:48,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:48,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:48,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:48,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:48,687 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1254631000, now seen corresponding path program 1 times [2021-11-23 16:45:48,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:48,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046451402] [2021-11-23 16:45:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:48,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:48,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:48,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:45:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:48,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:45:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:49,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:49,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:49,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046451402] [2021-11-23 16:45:49,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046451402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:49,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:49,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:45:49,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295483704] [2021-11-23 16:45:49,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:49,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:49,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:49,244 INFO L87 Difference]: Start difference. First operand 702 states and 1296 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:49,400 INFO L93 Difference]: Finished difference Result 862 states and 1570 transitions. [2021-11-23 16:45:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-11-23 16:45:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:49,407 INFO L225 Difference]: With dead ends: 862 [2021-11-23 16:45:49,407 INFO L226 Difference]: Without dead ends: 702 [2021-11-23 16:45:49,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:49,410 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 3 mSDsluCounter, 3819 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5113 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:49,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5113 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-23 16:45:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2021-11-23 16:45:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.7631954350927246) internal successors, (1236), 701 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1236 transitions. [2021-11-23 16:45:49,437 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1236 transitions. Word has length 153 [2021-11-23 16:45:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:49,438 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1236 transitions. [2021-11-23 16:45:49,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1236 transitions. [2021-11-23 16:45:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-23 16:45:49,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:49,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:49,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:49,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:49,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1674803025, now seen corresponding path program 1 times [2021-11-23 16:45:49,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:49,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408807698] [2021-11-23 16:45:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:49,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:49,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:49,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:49,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:45:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:49,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:49,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:50,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:50,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:50,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408807698] [2021-11-23 16:45:50,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408807698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:50,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:50,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:50,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694888698] [2021-11-23 16:45:50,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:50,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:50,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:50,317 INFO L87 Difference]: Start difference. First operand 702 states and 1236 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:50,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:50,404 INFO L93 Difference]: Finished difference Result 1001 states and 1751 transitions. [2021-11-23 16:45:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:50,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-11-23 16:45:50,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:50,423 INFO L225 Difference]: With dead ends: 1001 [2021-11-23 16:45:50,423 INFO L226 Difference]: Without dead ends: 845 [2021-11-23 16:45:50,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:50,430 INFO L933 BasicCegarLoop]: 1235 mSDtfsCounter, 237 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:50,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 2407 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:45:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-11-23 16:45:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 843. [2021-11-23 16:45:50,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 1.7517814726840855) internal successors, (1475), 842 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1475 transitions. [2021-11-23 16:45:50,472 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1475 transitions. Word has length 212 [2021-11-23 16:45:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:50,475 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1475 transitions. [2021-11-23 16:45:50,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1475 transitions. [2021-11-23 16:45:50,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-23 16:45:50,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:50,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:50,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:50,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:50,694 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1449767861, now seen corresponding path program 1 times [2021-11-23 16:45:50,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:50,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111933929] [2021-11-23 16:45:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:50,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:50,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:50,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:50,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:45:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:50,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:51,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:51,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:51,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111933929] [2021-11-23 16:45:51,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111933929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:51,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:51,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:51,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253957799] [2021-11-23 16:45:51,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:51,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:51,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:51,456 INFO L87 Difference]: Start difference. First operand 843 states and 1475 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:51,640 INFO L93 Difference]: Finished difference Result 2498 states and 4370 transitions. [2021-11-23 16:45:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:51,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-11-23 16:45:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:51,654 INFO L225 Difference]: With dead ends: 2498 [2021-11-23 16:45:51,654 INFO L226 Difference]: Without dead ends: 1668 [2021-11-23 16:45:51,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:51,657 INFO L933 BasicCegarLoop]: 1206 mSDtfsCounter, 3449 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 2399 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:51,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3449 Valid, 2399 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-11-23 16:45:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1666. [2021-11-23 16:45:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 1.7423423423423423) internal successors, (2901), 1665 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2901 transitions. [2021-11-23 16:45:51,737 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2901 transitions. Word has length 216 [2021-11-23 16:45:51,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:51,738 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 2901 transitions. [2021-11-23 16:45:51,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:51,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2901 transitions. [2021-11-23 16:45:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-23 16:45:51,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:51,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:51,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:51,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:51,960 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash -719148376, now seen corresponding path program 1 times [2021-11-23 16:45:51,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:51,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987676074] [2021-11-23 16:45:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:51,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:51,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:51,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:51,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:45:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:52,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:52,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:52,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:52,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:52,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987676074] [2021-11-23 16:45:52,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987676074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:52,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:52,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:52,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370653100] [2021-11-23 16:45:52,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:52,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:52,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:52,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:52,608 INFO L87 Difference]: Start difference. First operand 1666 states and 2901 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:52,673 INFO L93 Difference]: Finished difference Result 2236 states and 3887 transitions. [2021-11-23 16:45:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:52,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-11-23 16:45:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:52,686 INFO L225 Difference]: With dead ends: 2236 [2021-11-23 16:45:52,687 INFO L226 Difference]: Without dead ends: 1929 [2021-11-23 16:45:52,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:52,689 INFO L933 BasicCegarLoop]: 1450 mSDtfsCounter, 246 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 2649 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 [2021-11-23 16:45:52,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 2649 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:45:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-11-23 16:45:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1927. [2021-11-23 16:45:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 1.739356178608515) internal successors, (3350), 1926 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 3350 transitions. [2021-11-23 16:45:52,765 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 3350 transitions. Word has length 216 [2021-11-23 16:45:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:52,765 INFO L470 AbstractCegarLoop]: Abstraction has 1927 states and 3350 transitions. [2021-11-23 16:45:52,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 3350 transitions. [2021-11-23 16:45:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-23 16:45:52,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:52,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:52,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:52,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:52,984 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:52,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:52,984 INFO L85 PathProgramCache]: Analyzing trace with hash 167412230, now seen corresponding path program 1 times [2021-11-23 16:45:52,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:52,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397178315] [2021-11-23 16:45:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:52,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:52,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:52,987 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:53,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:45:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:53,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:53,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:53,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:53,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397178315] [2021-11-23 16:45:53,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397178315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:53,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:53,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:53,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431088704] [2021-11-23 16:45:53,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:53,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:53,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:53,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:53,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:53,782 INFO L87 Difference]: Start difference. First operand 1927 states and 3350 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:54,026 INFO L93 Difference]: Finished difference Result 5731 states and 9963 transitions. [2021-11-23 16:45:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 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 218 [2021-11-23 16:45:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:54,051 INFO L225 Difference]: With dead ends: 5731 [2021-11-23 16:45:54,052 INFO L226 Difference]: Without dead ends: 3818 [2021-11-23 16:45:54,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:54,060 INFO L933 BasicCegarLoop]: 1450 mSDtfsCounter, 3194 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3194 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:54,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3194 Valid, 2643 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2021-11-23 16:45:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 3816. [2021-11-23 16:45:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3815 states have (on average 1.730537352555701) internal successors, (6602), 3815 states have internal predecessors, (6602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 6602 transitions. [2021-11-23 16:45:54,266 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 6602 transitions. Word has length 218 [2021-11-23 16:45:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:54,267 INFO L470 AbstractCegarLoop]: Abstraction has 3816 states and 6602 transitions. [2021-11-23 16:45:54,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 6602 transitions. [2021-11-23 16:45:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-23 16:45:54,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:54,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:54,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:54,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:54,489 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:54,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:54,490 INFO L85 PathProgramCache]: Analyzing trace with hash -908796319, now seen corresponding path program 1 times [2021-11-23 16:45:54,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:54,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153091909] [2021-11-23 16:45:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:54,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:54,492 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:54,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:45:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:54,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:54,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:55,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:55,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:55,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153091909] [2021-11-23 16:45:55,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153091909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:55,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:55,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:55,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860191253] [2021-11-23 16:45:55,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:55,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:55,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:55,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:55,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:55,138 INFO L87 Difference]: Start difference. First operand 3816 states and 6602 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:55,523 INFO L93 Difference]: Finished difference Result 11349 states and 19635 transitions. [2021-11-23 16:45:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:55,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2021-11-23 16:45:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:55,569 INFO L225 Difference]: With dead ends: 11349 [2021-11-23 16:45:55,570 INFO L226 Difference]: Without dead ends: 7564 [2021-11-23 16:45:55,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:55,581 INFO L933 BasicCegarLoop]: 1238 mSDtfsCounter, 3395 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:55,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3395 Valid, 2431 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7564 states. [2021-11-23 16:45:55,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7564 to 7562. [2021-11-23 16:45:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7562 states, 7561 states have (on average 1.7218621875413305) internal successors, (13019), 7561 states have internal predecessors, (13019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7562 states to 7562 states and 13019 transitions. [2021-11-23 16:45:55,977 INFO L78 Accepts]: Start accepts. Automaton has 7562 states and 13019 transitions. Word has length 220 [2021-11-23 16:45:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:55,978 INFO L470 AbstractCegarLoop]: Abstraction has 7562 states and 13019 transitions. [2021-11-23 16:45:55,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7562 states and 13019 transitions. [2021-11-23 16:45:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-23 16:45:55,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:55,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:56,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:56,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,206 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:56,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1379637924, now seen corresponding path program 1 times [2021-11-23 16:45:56,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:56,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178658855] [2021-11-23 16:45:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:56,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:56,209 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:56,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:45:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:56,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:56,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:56,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:56,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178658855] [2021-11-23 16:45:56,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178658855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:56,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:56,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:56,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800453874] [2021-11-23 16:45:56,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:56,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:56,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:56,888 INFO L87 Difference]: Start difference. First operand 7562 states and 13019 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:57,526 INFO L93 Difference]: Finished difference Result 22499 states and 38740 transitions. [2021-11-23 16:45:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:57,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2021-11-23 16:45:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:57,603 INFO L225 Difference]: With dead ends: 22499 [2021-11-23 16:45:57,603 INFO L226 Difference]: Without dead ends: 14999 [2021-11-23 16:45:57,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:57,616 INFO L933 BasicCegarLoop]: 1246 mSDtfsCounter, 3374 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3374 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:57,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3374 Valid, 2439 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14999 states. [2021-11-23 16:45:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14999 to 14997. [2021-11-23 16:45:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14997 states, 14996 states have (on average 1.7134569218458255) internal successors, (25695), 14996 states have internal predecessors, (25695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14997 states to 14997 states and 25695 transitions. [2021-11-23 16:45:58,252 INFO L78 Accepts]: Start accepts. Automaton has 14997 states and 25695 transitions. Word has length 222 [2021-11-23 16:45:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:58,253 INFO L470 AbstractCegarLoop]: Abstraction has 14997 states and 25695 transitions. [2021-11-23 16:45:58,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 14997 states and 25695 transitions. [2021-11-23 16:45:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-23 16:45:58,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:58,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:58,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:58,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:58,555 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:58,556 INFO L85 PathProgramCache]: Analyzing trace with hash 401901281, now seen corresponding path program 1 times [2021-11-23 16:45:58,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:58,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994522861] [2021-11-23 16:45:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:58,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:58,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:58,557 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:58,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:45:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:58,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:59,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:59,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:59,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994522861] [2021-11-23 16:45:59,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994522861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:59,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:59,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:59,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447931248] [2021-11-23 16:45:59,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:59,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:59,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:59,218 INFO L87 Difference]: Start difference. First operand 14997 states and 25695 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:59,771 INFO L93 Difference]: Finished difference Result 27617 states and 47097 transitions. [2021-11-23 16:45:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2021-11-23 16:45:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:59,818 INFO L225 Difference]: With dead ends: 27617 [2021-11-23 16:45:59,818 INFO L226 Difference]: Without dead ends: 21055 [2021-11-23 16:45:59,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:59,831 INFO L933 BasicCegarLoop]: 1243 mSDtfsCounter, 231 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:59,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 2424 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:45:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21055 states. [2021-11-23 16:46:00,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21055 to 21053. [2021-11-23 16:46:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21053 states, 21052 states have (on average 1.7043036291088733) internal successors, (35879), 21052 states have internal predecessors, (35879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21053 states to 21053 states and 35879 transitions. [2021-11-23 16:46:00,630 INFO L78 Accepts]: Start accepts. Automaton has 21053 states and 35879 transitions. Word has length 224 [2021-11-23 16:46:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:00,631 INFO L470 AbstractCegarLoop]: Abstraction has 21053 states and 35879 transitions. [2021-11-23 16:46:00,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 21053 states and 35879 transitions. [2021-11-23 16:46:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 16:46:00,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:00,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:00,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:00,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:00,877 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1867506307, now seen corresponding path program 1 times [2021-11-23 16:46:00,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:00,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159193953] [2021-11-23 16:46:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:00,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:00,882 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:00,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:46:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:46:01,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:01,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:01,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:01,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159193953] [2021-11-23 16:46:01,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159193953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:01,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:01,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:01,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660288394] [2021-11-23 16:46:01,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:01,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:46:01,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:01,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:46:01,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:46:01,689 INFO L87 Difference]: Start difference. First operand 21053 states and 35879 transitions. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:02,830 INFO L93 Difference]: Finished difference Result 62081 states and 105833 transitions. [2021-11-23 16:46:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:46:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2021-11-23 16:46:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:02,939 INFO L225 Difference]: With dead ends: 62081 [2021-11-23 16:46:02,939 INFO L226 Difference]: Without dead ends: 41415 [2021-11-23 16:46:02,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:02,973 INFO L933 BasicCegarLoop]: 1230 mSDtfsCounter, 3289 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3289 SdHoareTripleChecker+Valid, 2423 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:02,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3289 Valid, 2423 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:46:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41415 states. [2021-11-23 16:46:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41415 to 41413. [2021-11-23 16:46:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41413 states, 41412 states have (on average 1.69706848256544) internal successors, (70279), 41412 states have internal predecessors, (70279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41413 states to 41413 states and 70279 transitions. [2021-11-23 16:46:04,368 INFO L78 Accepts]: Start accepts. Automaton has 41413 states and 70279 transitions. Word has length 228 [2021-11-23 16:46:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:04,373 INFO L470 AbstractCegarLoop]: Abstraction has 41413 states and 70279 transitions. [2021-11-23 16:46:04,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 41413 states and 70279 transitions. [2021-11-23 16:46:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 16:46:04,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:04,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:04,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:04,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:04,665 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:04,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:04,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1150025500, now seen corresponding path program 1 times [2021-11-23 16:46:04,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:04,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299226523] [2021-11-23 16:46:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:04,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:04,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:04,668 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:04,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:46:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:04,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:46:04,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:05,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:05,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:05,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299226523] [2021-11-23 16:46:05,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299226523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:05,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:05,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:46:05,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026291628] [2021-11-23 16:46:05,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:05,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:05,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:05,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:05,398 INFO L87 Difference]: Start difference. First operand 41413 states and 70279 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:06,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:06,304 INFO L93 Difference]: Finished difference Result 65561 states and 111129 transitions. [2021-11-23 16:46:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2021-11-23 16:46:06,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:06,419 INFO L225 Difference]: With dead ends: 65561 [2021-11-23 16:46:06,419 INFO L226 Difference]: Without dead ends: 52551 [2021-11-23 16:46:06,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:06,444 INFO L933 BasicCegarLoop]: 1434 mSDtfsCounter, 232 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 2634 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 [2021-11-23 16:46:06,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 2634 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:46:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52551 states. [2021-11-23 16:46:07,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52551 to 52549. [2021-11-23 16:46:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52549 states, 52548 states have (on average 1.6918436477125676) internal successors, (88903), 52548 states have internal predecessors, (88903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52549 states to 52549 states and 88903 transitions. [2021-11-23 16:46:07,967 INFO L78 Accepts]: Start accepts. Automaton has 52549 states and 88903 transitions. Word has length 228 [2021-11-23 16:46:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:07,968 INFO L470 AbstractCegarLoop]: Abstraction has 52549 states and 88903 transitions. [2021-11-23 16:46:07,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 52549 states and 88903 transitions. [2021-11-23 16:46:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-23 16:46:08,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:08,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:08,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:08,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:08,456 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:08,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1409305400, now seen corresponding path program 1 times [2021-11-23 16:46:08,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:08,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224604814] [2021-11-23 16:46:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:08,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:08,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:08,459 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:08,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:46:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:46:08,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:09,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:09,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:09,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224604814] [2021-11-23 16:46:09,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224604814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:09,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:09,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:46:09,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699156973] [2021-11-23 16:46:09,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:09,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:09,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:09,179 INFO L87 Difference]: Start difference. First operand 52549 states and 88903 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:11,094 INFO L93 Difference]: Finished difference Result 152315 states and 257252 transitions. [2021-11-23 16:46:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:11,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 230 [2021-11-23 16:46:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:11,280 INFO L225 Difference]: With dead ends: 152315 [2021-11-23 16:46:11,280 INFO L226 Difference]: Without dead ends: 102953 [2021-11-23 16:46:11,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:11,322 INFO L933 BasicCegarLoop]: 2379 mSDtfsCounter, 981 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:11,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 3586 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:46:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102953 states. [2021-11-23 16:46:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102953 to 102951. [2021-11-23 16:46:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102951 states, 102950 states have (on average 1.683399708596406) internal successors, (173306), 102950 states have internal predecessors, (173306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102951 states to 102951 states and 173306 transitions. [2021-11-23 16:46:14,618 INFO L78 Accepts]: Start accepts. Automaton has 102951 states and 173306 transitions. Word has length 230 [2021-11-23 16:46:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:14,620 INFO L470 AbstractCegarLoop]: Abstraction has 102951 states and 173306 transitions. [2021-11-23 16:46:14,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 102951 states and 173306 transitions. [2021-11-23 16:46:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-23 16:46:14,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:14,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:14,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 16:46:14,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:14,917 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:14,918 INFO L85 PathProgramCache]: Analyzing trace with hash -365254622, now seen corresponding path program 1 times [2021-11-23 16:46:14,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:14,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49498723] [2021-11-23 16:46:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:14,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:14,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:14,920 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:14,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:46:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:15,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:46:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:15,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:15,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:15,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49498723] [2021-11-23 16:46:15,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49498723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:15,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:15,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:15,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753802836] [2021-11-23 16:46:15,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:15,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:46:15,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:15,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:46:15,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:46:15,670 INFO L87 Difference]: Start difference. First operand 102951 states and 173306 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:18,287 INFO L93 Difference]: Finished difference Result 221771 states and 373623 transitions. [2021-11-23 16:46:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:46:18,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 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 230 [2021-11-23 16:46:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:18,478 INFO L225 Difference]: With dead ends: 221771 [2021-11-23 16:46:18,479 INFO L226 Difference]: Without dead ends: 119316 [2021-11-23 16:46:18,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:18,540 INFO L933 BasicCegarLoop]: 1244 mSDtfsCounter, 3330 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3330 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:18,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3330 Valid, 2437 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:46:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119316 states. [2021-11-23 16:46:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119316 to 104027. [2021-11-23 16:46:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104027 states, 104026 states have (on average 1.6837136869628746) internal successors, (175150), 104026 states have internal predecessors, (175150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104027 states to 104027 states and 175150 transitions. [2021-11-23 16:46:21,671 INFO L78 Accepts]: Start accepts. Automaton has 104027 states and 175150 transitions. Word has length 230 [2021-11-23 16:46:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:21,672 INFO L470 AbstractCegarLoop]: Abstraction has 104027 states and 175150 transitions. [2021-11-23 16:46:21,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 104027 states and 175150 transitions. [2021-11-23 16:46:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-23 16:46:21,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:21,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:22,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 16:46:22,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:22,287 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1871630851, now seen corresponding path program 1 times [2021-11-23 16:46:22,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:22,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450708136] [2021-11-23 16:46:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:22,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:22,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:22,289 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:22,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:46:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:22,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:46:22,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:22,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:22,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:22,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450708136] [2021-11-23 16:46:22,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450708136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:22,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:22,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:22,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642741703] [2021-11-23 16:46:22,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:22,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:46:22,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:22,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:46:22,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:46:22,940 INFO L87 Difference]: Start difference. First operand 104027 states and 175150 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:26,936 INFO L93 Difference]: Finished difference Result 309375 states and 520907 transitions. [2021-11-23 16:46:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:46:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 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 232 [2021-11-23 16:46:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:27,328 INFO L225 Difference]: With dead ends: 309375 [2021-11-23 16:46:27,328 INFO L226 Difference]: Without dead ends: 206007 [2021-11-23 16:46:27,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:27,407 INFO L933 BasicCegarLoop]: 1255 mSDtfsCounter, 3286 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3286 SdHoareTripleChecker+Valid, 2448 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:27,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3286 Valid, 2448 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:46:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206007 states. [2021-11-23 16:46:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206007 to 206005. [2021-11-23 16:46:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206005 states, 206004 states have (on average 1.6756907632861497) internal successors, (345199), 206004 states have internal predecessors, (345199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206005 states to 206005 states and 345199 transitions. [2021-11-23 16:46:33,500 INFO L78 Accepts]: Start accepts. Automaton has 206005 states and 345199 transitions. Word has length 232 [2021-11-23 16:46:33,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:33,501 INFO L470 AbstractCegarLoop]: Abstraction has 206005 states and 345199 transitions. [2021-11-23 16:46:33,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:33,501 INFO L276 IsEmpty]: Start isEmpty. Operand 206005 states and 345199 transitions. [2021-11-23 16:46:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-23 16:46:33,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:33,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:33,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:33,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:33,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash -676062600, now seen corresponding path program 1 times [2021-11-23 16:46:33,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:33,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007427677] [2021-11-23 16:46:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:33,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:33,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:33,805 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:34,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7751edf-1472-474d-b870-fe048ca2bb9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:46:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:34,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:46:34,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:35,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:35,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:35,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007427677] [2021-11-23 16:46:35,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007427677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:35,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:35,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:35,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252624113] [2021-11-23 16:46:35,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:35,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:46:35,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:35,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:46:35,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:46:35,043 INFO L87 Difference]: Start difference. First operand 206005 states and 345199 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)