./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label57.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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label57.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/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 16f5fbe4e4f43b4f458c808219051e20c4982642680d27057faf1e29b0e8c222 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:39:57,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:39:57,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:39:57,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:39:57,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:39:57,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:39:57,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:39:57,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:39:57,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:39:57,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:39:57,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:39:57,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:39:57,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:39:57,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:39:57,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:39:57,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:39:57,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:39:57,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:39:57,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:39:57,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:39:57,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:39:57,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:39:57,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:39:57,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:39:57,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:39:57,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:39:57,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:39:57,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:39:57,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:39:57,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:39:57,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:39:58,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:39:58,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:39:58,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:39:58,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:39:58,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:39:58,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:39:58,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:39:58,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:39:58,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:39:58,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:39:58,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:39:58,071 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:39:58,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:39:58,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:39:58,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:39:58,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:39:58,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:39:58,083 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:39:58,083 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:39:58,084 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:39:58,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:39:58,086 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:39:58,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:39:58,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:39:58,087 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:39:58,087 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:39:58,087 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:39:58,088 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:39:58,088 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:39:58,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:39:58,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:39:58,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:39:58,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:39:58,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:39:58,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:39:58,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:39:58,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:39:58,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:39:58,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:39:58,095 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:39:58,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:39:58,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:39:58,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:39:58,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:39:58,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:39:58,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:39:58,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:39:58,098 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:39:58,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:39:58,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:39:58,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:39:58,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:39:58,099 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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16f5fbe4e4f43b4f458c808219051e20c4982642680d27057faf1e29b0e8c222 [2021-11-23 17:39:58,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:39:58,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:39:58,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:39:58,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:39:58,488 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:39:58,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem18_label57.c [2021-11-23 17:39:58,576 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data/8209e7db8/1a2477a8121d4c9f9aeeeddac97b0d95/FLAG6b0a14e9d [2021-11-23 17:39:59,601 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:39:59,603 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/sv-benchmarks/c/eca-rers2012/Problem18_label57.c [2021-11-23 17:39:59,652 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data/8209e7db8/1a2477a8121d4c9f9aeeeddac97b0d95/FLAG6b0a14e9d [2021-11-23 17:40:00,064 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data/8209e7db8/1a2477a8121d4c9f9aeeeddac97b0d95 [2021-11-23 17:40:00,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:40:00,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:40:00,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:40:00,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:40:00,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:40:00,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:40:00" (1/1) ... [2021-11-23 17:40:00,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da15691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:00, skipping insertion in model container [2021-11-23 17:40:00,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:40:00" (1/1) ... [2021-11-23 17:40:00,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:40:00,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:40:00,602 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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/sv-benchmarks/c/eca-rers2012/Problem18_label57.c[1255,1268] [2021-11-23 17:40:01,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:40:01,665 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:40:01,687 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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/sv-benchmarks/c/eca-rers2012/Problem18_label57.c[1255,1268] [2021-11-23 17:40:02,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:40:02,364 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:40:02,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02 WrapperNode [2021-11-23 17:40:02,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:40:02,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:40:02,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:40:02,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:40:02,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:02,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:02,776 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-11-23 17:40:02,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:40:02,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:40:02,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:40:02,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:40:02,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:02,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:02,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:02,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:03,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:03,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:03,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:03,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:40:03,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:40:03,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:40:03,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:40:03,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:02" (1/1) ... [2021-11-23 17:40:03,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:40:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:03,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:40:03,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:40:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:40:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:40:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:40:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:40:03,470 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:40:03,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:40:07,998 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:40:08,076 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 17:40:08,084 INFO L158 Benchmark]: Toolchain (without parser) took 8008.11ms. Allocated memory was 109.1MB in the beginning and 425.7MB in the end (delta: 316.7MB). Free memory was 67.6MB in the beginning and 273.7MB in the end (delta: -206.1MB). Peak memory consumption was 119.0MB. Max. memory is 16.1GB. [2021-11-23 17:40:08,084 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 109.1MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:40:08,087 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2290.13ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 67.3MB in the beginning and 99.9MB in the end (delta: -32.6MB). Peak memory consumption was 56.3MB. Max. memory is 16.1GB. [2021-11-23 17:40:08,089 INFO L158 Benchmark]: Boogie Procedure Inliner took 448.98ms. Allocated memory is still 151.0MB. Free memory was 99.9MB in the beginning and 84.3MB in the end (delta: 15.6MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. [2021-11-23 17:40:08,090 INFO L158 Benchmark]: Boogie Preprocessor took 436.32ms. Allocated memory was 151.0MB in the beginning and 251.7MB in the end (delta: 100.7MB). Free memory was 84.3MB in the beginning and 172.3MB in the end (delta: -88.0MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. [2021-11-23 17:40:08,092 INFO L158 Benchmark]: RCFGBuilder took 4824.92ms. Allocated memory was 251.7MB in the beginning and 425.7MB in the end (delta: 174.1MB). Free memory was 172.3MB in the beginning and 273.7MB in the end (delta: -101.4MB). Peak memory consumption was 81.1MB. Max. memory is 16.1GB. [2021-11-23 17:40:08,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 109.1MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2290.13ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 67.3MB in the beginning and 99.9MB in the end (delta: -32.6MB). Peak memory consumption was 56.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 448.98ms. Allocated memory is still 151.0MB. Free memory was 99.9MB in the beginning and 84.3MB in the end (delta: 15.6MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 436.32ms. Allocated memory was 151.0MB in the beginning and 251.7MB in the end (delta: 100.7MB). Free memory was 84.3MB in the beginning and 172.3MB in the end (delta: -88.0MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. * RCFGBuilder took 4824.92ms. Allocated memory was 251.7MB in the beginning and 425.7MB in the end (delta: 174.1MB). Free memory was 172.3MB in the beginning and 273.7MB in the end (delta: -101.4MB). Peak memory consumption was 81.1MB. 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 17:40:08,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label57.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/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 16f5fbe4e4f43b4f458c808219051e20c4982642680d27057faf1e29b0e8c222 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:40:11,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:40:11,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:40:11,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:40:11,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:40:11,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:40:11,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:40:11,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:40:11,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:40:11,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:40:11,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:40:11,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:40:11,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:40:11,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:40:11,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:40:11,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:40:11,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:40:11,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:40:11,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:40:11,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:40:11,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:40:11,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:40:11,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:40:11,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:40:11,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:40:11,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:40:11,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:40:11,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:40:11,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:40:11,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:40:11,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:40:11,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:40:11,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:40:11,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:40:11,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:40:11,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:40:11,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:40:11,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:40:11,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:40:11,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:40:11,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:40:11,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:40:11,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:40:11,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:40:11,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:40:11,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:40:11,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:40:11,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:40:11,503 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:40:11,503 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:40:11,504 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:40:11,504 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:40:11,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:40:11,506 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:40:11,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:40:11,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:40:11,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:40:11,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:40:11,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:40:11,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:40:11,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:40:11,509 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:40:11,510 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:40:11,510 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:40:11,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:40:11,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:40:11,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:40:11,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:40:11,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:40:11,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:40:11,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:40:11,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:40:11,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:40:11,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:40:11,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:40:11,514 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:40:11,514 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:11,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:40:11,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:40:11,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:40:11,515 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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16f5fbe4e4f43b4f458c808219051e20c4982642680d27057faf1e29b0e8c222 [2021-11-23 17:40:11,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:40:11,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:40:11,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:40:11,994 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:40:11,995 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:40:11,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem18_label57.c [2021-11-23 17:40:12,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data/e2f4c2c74/4d2026c066d646d09efd6593a9aaefbd/FLAG49026b4fa [2021-11-23 17:40:13,261 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:40:13,261 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/sv-benchmarks/c/eca-rers2012/Problem18_label57.c [2021-11-23 17:40:13,298 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data/e2f4c2c74/4d2026c066d646d09efd6593a9aaefbd/FLAG49026b4fa [2021-11-23 17:40:13,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/data/e2f4c2c74/4d2026c066d646d09efd6593a9aaefbd [2021-11-23 17:40:13,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:40:13,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:40:13,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:40:13,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:40:13,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:40:13,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:40:13" (1/1) ... [2021-11-23 17:40:13,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f6a3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:13, skipping insertion in model container [2021-11-23 17:40:13,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:40:13" (1/1) ... [2021-11-23 17:40:13,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:40:13,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:40:14,056 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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/sv-benchmarks/c/eca-rers2012/Problem18_label57.c[1255,1268] [2021-11-23 17:40:15,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:40:15,234 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:40:15,257 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_382aef32-f9a9-4fc2-8e48-84e90d659a8e/sv-benchmarks/c/eca-rers2012/Problem18_label57.c[1255,1268] [2021-11-23 17:40:15,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:40:15,903 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:40:15,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15 WrapperNode [2021-11-23 17:40:15,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:40:15,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:40:15,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:40:15,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:40:15,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:15,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:16,225 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4128 [2021-11-23 17:40:16,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:40:16,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:40:16,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:40:16,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:40:16,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:16,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:16,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:16,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:16,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:16,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:16,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:16,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:40:16,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:40:16,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:40:16,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:40:16,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (1/1) ... [2021-11-23 17:40:16,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:40:16,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:16,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:40:16,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:40:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:40:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:40:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:40:16,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:40:16,782 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:40:16,784 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:40:35,499 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:40:35,522 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:40:35,522 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:40:35,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:40:35 BoogieIcfgContainer [2021-11-23 17:40:35,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:40:35,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:40:35,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:40:35,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:40:35,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:40:13" (1/3) ... [2021-11-23 17:40:35,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f17511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:40:35, skipping insertion in model container [2021-11-23 17:40:35,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:15" (2/3) ... [2021-11-23 17:40:35,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f17511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:40:35, skipping insertion in model container [2021-11-23 17:40:35,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:40:35" (3/3) ... [2021-11-23 17:40:35,537 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label57.c [2021-11-23 17:40:35,543 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:40:35,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:40:35,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:40:35,619 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 17:40:35,620 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:40:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 17:40:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:40:35,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:35,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:35,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:35,678 INFO L85 PathProgramCache]: Analyzing trace with hash 297966002, now seen corresponding path program 1 times [2021-11-23 17:40:35,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:35,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949418552] [2021-11-23 17:40:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:35,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:35,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:35,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:35,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:40:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:35,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:35,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:35,890 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 17:40:35,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:35,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:35,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949418552] [2021-11-23 17:40:35,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949418552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:35,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:35,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:40:35,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218224582] [2021-11-23 17:40:35,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:35,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:35,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:35,989 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 17:40:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:59,771 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2021-11-23 17:40:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:59,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-23 17:40:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:59,828 INFO L225 Difference]: With dead ends: 2205 [2021-11-23 17:40:59,828 INFO L226 Difference]: Without dead ends: 1384 [2021-11-23 17:40:59,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 17:40:59,851 INFO L933 BasicCegarLoop]: 523 mSDtfsCounter, 708 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:59,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 532 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time] [2021-11-23 17:40:59,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-11-23 17:41:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-11-23 17:41:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.5777295733911787) internal successors, (2182), 1383 states have internal predecessors, (2182), 0 states have call successors, (0), 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 17:41:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2182 transitions. [2021-11-23 17:41:00,040 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2182 transitions. Word has length 8 [2021-11-23 17:41:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:00,041 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2182 transitions. [2021-11-23 17:41:00,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 17:41:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2182 transitions. [2021-11-23 17:41:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 17:41:00,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:00,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:00,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:00,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:00,257 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1412134971, now seen corresponding path program 1 times [2021-11-23 17:41:00,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:00,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132142027] [2021-11-23 17:41:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:00,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:00,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:00,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:00,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:41:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:41:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:00,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:00,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132142027] [2021-11-23 17:41:00,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132142027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:00,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:00,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:41:00,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68935556] [2021-11-23 17:41:00,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:00,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:41:00,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:41:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:41:00,711 INFO L87 Difference]: Start difference. First operand 1384 states and 2182 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:22,981 INFO L93 Difference]: Finished difference Result 4146 states and 6541 transitions. [2021-11-23 17:41:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-23 17:41:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:23,004 INFO L225 Difference]: With dead ends: 4146 [2021-11-23 17:41:23,004 INFO L226 Difference]: Without dead ends: 2764 [2021-11-23 17:41:23,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 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 17:41:23,009 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 713 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:23,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 529 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 22.1s Time] [2021-11-23 17:41:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-11-23 17:41:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2021-11-23 17:41:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.3481722765110387) internal successors, (3725), 2763 states have internal predecessors, (3725), 0 states have call successors, (0), 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 17:41:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3725 transitions. [2021-11-23 17:41:23,103 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3725 transitions. Word has length 74 [2021-11-23 17:41:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:23,104 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 3725 transitions. [2021-11-23 17:41:23,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3725 transitions. [2021-11-23 17:41:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 17:41:23,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:23,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:23,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:23,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:23,317 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1867337143, now seen corresponding path program 1 times [2021-11-23 17:41:23,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:23,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512540931] [2021-11-23 17:41:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:23,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:23,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:23,321 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:23,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:41:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:23,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:41:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:23,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:23,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:23,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512540931] [2021-11-23 17:41:23,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512540931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:23,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:23,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:41:23,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792042513] [2021-11-23 17:41:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:23,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:41:23,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:41:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:41:23,824 INFO L87 Difference]: Start difference. First operand 2764 states and 3725 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 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 17:41:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:40,766 INFO L93 Difference]: Finished difference Result 6906 states and 8991 transitions. [2021-11-23 17:41:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:40,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-11-23 17:41:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:40,803 INFO L225 Difference]: With dead ends: 6906 [2021-11-23 17:41:40,803 INFO L226 Difference]: Without dead ends: 4144 [2021-11-23 17:41:40,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 92 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 17:41:40,809 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 623 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:40,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 623 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 16.8s Time] [2021-11-23 17:41:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-11-23 17:41:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2021-11-23 17:41:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.243784697079411) internal successors, (5153), 4143 states have internal predecessors, (5153), 0 states have call successors, (0), 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 17:41:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5153 transitions. [2021-11-23 17:41:40,939 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5153 transitions. Word has length 94 [2021-11-23 17:41:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:40,943 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 5153 transitions. [2021-11-23 17:41:40,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 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 17:41:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5153 transitions. [2021-11-23 17:41:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:41:40,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:40,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:41:40,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:41,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:41,172 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash 638299164, now seen corresponding path program 1 times [2021-11-23 17:41:41,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:41,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428095454] [2021-11-23 17:41:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:41,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:41,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:41,179 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:41,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:41:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:41,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:41:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:42,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:42,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:42,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428095454] [2021-11-23 17:41:42,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428095454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:42,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:42,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:41:42,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663526493] [2021-11-23 17:41:42,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:42,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:41:42,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:42,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:41:42,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:41:42,255 INFO L87 Difference]: Start difference. First operand 4144 states and 5153 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 17:41:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:57,488 INFO L93 Difference]: Finished difference Result 7596 states and 9584 transitions. [2021-11-23 17:41:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-23 17:41:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:57,518 INFO L225 Difference]: With dead ends: 7596 [2021-11-23 17:41:57,519 INFO L226 Difference]: Without dead ends: 4834 [2021-11-23 17:41:57,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 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 17:41:57,524 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 600 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:57,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 629 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2021-11-23 17:41:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2021-11-23 17:41:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 4834. [2021-11-23 17:41:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4834 states, 4833 states have (on average 1.2114628595075523) internal successors, (5855), 4833 states have internal predecessors, (5855), 0 states have call successors, (0), 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 17:41:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4834 states to 4834 states and 5855 transitions. [2021-11-23 17:41:57,638 INFO L78 Accepts]: Start accepts. Automaton has 4834 states and 5855 transitions. Word has length 101 [2021-11-23 17:41:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:57,639 INFO L470 AbstractCegarLoop]: Abstraction has 4834 states and 5855 transitions. [2021-11-23 17:41:57,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 17:41:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4834 states and 5855 transitions. [2021-11-23 17:41:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-23 17:41:57,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:57,646 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:41:57,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 17:41:57,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:57,859 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash 7185365, now seen corresponding path program 1 times [2021-11-23 17:41:57,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:57,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884778565] [2021-11-23 17:41:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:57,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:57,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:57,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:57,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:41:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:58,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:41:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:00,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:42:00,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884778565] [2021-11-23 17:42:00,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884778565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:42:00,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:42:00,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:42:00,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501696246] [2021-11-23 17:42:00,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:42:00,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:42:00,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:00,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:42:00,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:42:00,570 INFO L87 Difference]: Start difference. First operand 4834 states and 5855 transitions. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 17:42:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:17,377 INFO L93 Difference]: Finished difference Result 7649 states and 9631 transitions. [2021-11-23 17:42:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:42:17,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 283 [2021-11-23 17:42:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:17,411 INFO L225 Difference]: With dead ends: 7649 [2021-11-23 17:42:17,411 INFO L226 Difference]: Without dead ends: 3454 [2021-11-23 17:42:17,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:42:17,420 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 524 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2741 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:17,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 637 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2741 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time] [2021-11-23 17:42:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2021-11-23 17:42:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3454. [2021-11-23 17:42:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.2794671300318563) internal successors, (4418), 3453 states have internal predecessors, (4418), 0 states have call successors, (0), 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 17:42:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 4418 transitions. [2021-11-23 17:42:17,515 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 4418 transitions. Word has length 283 [2021-11-23 17:42:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:17,517 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 4418 transitions. [2021-11-23 17:42:17,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 17:42:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 4418 transitions. [2021-11-23 17:42:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-23 17:42:17,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:17,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:42:17,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:17,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:42:17,742 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash 275900463, now seen corresponding path program 1 times [2021-11-23 17:42:17,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:17,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678438148] [2021-11-23 17:42:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:17,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:17,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:17,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:17,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:42:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:17,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:42:17,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:42:19,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:42:19,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:19,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678438148] [2021-11-23 17:42:19,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678438148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:42:19,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:42:19,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:42:19,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277323171] [2021-11-23 17:42:19,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:42:19,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:42:19,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:42:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:42:19,329 INFO L87 Difference]: Start difference. First operand 3454 states and 4418 transitions. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 2 states have internal predecessors, (388), 0 states have call successors, (0), 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 17:42:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:44,304 INFO L93 Difference]: Finished difference Result 9666 states and 12556 transitions. [2021-11-23 17:42:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:42:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 2 states have internal predecessors, (388), 0 states have call successors, (0), 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 393 [2021-11-23 17:42:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:44,336 INFO L225 Difference]: With dead ends: 9666 [2021-11-23 17:42:44,336 INFO L226 Difference]: Without dead ends: 6904 [2021-11-23 17:42:44,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 391 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 17:42:44,341 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 394 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:44,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 641 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 24.8s Time] [2021-11-23 17:42:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2021-11-23 17:42:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6904. [2021-11-23 17:42:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.2016514558887441) internal successors, (8295), 6903 states have internal predecessors, (8295), 0 states have call successors, (0), 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 17:42:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 8295 transitions. [2021-11-23 17:42:44,521 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 8295 transitions. Word has length 393 [2021-11-23 17:42:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:44,522 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 8295 transitions. [2021-11-23 17:42:44,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 2 states have internal predecessors, (388), 0 states have call successors, (0), 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 17:42:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 8295 transitions. [2021-11-23 17:42:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2021-11-23 17:42:44,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:44,561 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:42:44,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:44,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:42:44,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash -458920639, now seen corresponding path program 1 times [2021-11-23 17:42:44,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:44,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159876411] [2021-11-23 17:42:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:44,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:44,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:44,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:44,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:42:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:45,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:42:45,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 17 proven. 172 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:42:48,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:42:50,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:50,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159876411] [2021-11-23 17:42:50,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159876411] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:42:50,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:42:50,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:42:50,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057125479] [2021-11-23 17:42:50,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:42:50,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:42:50,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:42:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:42:50,332 INFO L87 Difference]: Start difference. First operand 6904 states and 8295 transitions. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 17:43:37,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:43:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:45,393 INFO L93 Difference]: Finished difference Result 16566 states and 20618 transitions. [2021-11-23 17:43:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:43:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 908 [2021-11-23 17:43:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:45,441 INFO L225 Difference]: With dead ends: 16566 [2021-11-23 17:43:45,441 INFO L226 Difference]: Without dead ends: 11044 [2021-11-23 17:43:45,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1814 GetRequests, 1811 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 17:43:45,447 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 692 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 796 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:45,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 309 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 54.9s Time] [2021-11-23 17:43:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11044 states. [2021-11-23 17:43:45,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11044 to 11044. [2021-11-23 17:43:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11044 states, 11043 states have (on average 1.1901657158380874) internal successors, (13143), 11043 states have internal predecessors, (13143), 0 states have call successors, (0), 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 17:43:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11044 states to 11044 states and 13143 transitions. [2021-11-23 17:43:45,625 INFO L78 Accepts]: Start accepts. Automaton has 11044 states and 13143 transitions. Word has length 908 [2021-11-23 17:43:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:45,628 INFO L470 AbstractCegarLoop]: Abstraction has 11044 states and 13143 transitions. [2021-11-23 17:43:45,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 17:43:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 11044 states and 13143 transitions. [2021-11-23 17:43:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2021-11-23 17:43:45,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:45,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:43:45,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:45,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:43:45,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 446114340, now seen corresponding path program 1 times [2021-11-23 17:43:45,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:45,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292375322] [2021-11-23 17:43:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:45,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:45,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:45,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:45,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:43:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:46,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:43:46,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:43:49,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:49,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:49,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292375322] [2021-11-23 17:43:49,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292375322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:49,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:43:49,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:43:49,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439134550] [2021-11-23 17:43:49,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:49,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:43:49,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:49,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:43:49,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:43:49,394 INFO L87 Difference]: Start difference. First operand 11044 states and 13143 transitions. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 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 17:44:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:10,749 INFO L93 Difference]: Finished difference Result 23466 states and 28020 transitions. [2021-11-23 17:44:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:44:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 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 915 [2021-11-23 17:44:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:10,785 INFO L225 Difference]: With dead ends: 23466 [2021-11-23 17:44:10,785 INFO L226 Difference]: Without dead ends: 13804 [2021-11-23 17:44:10,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 912 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:44:10,795 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 777 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 3873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:10,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 620 Invalid, 3873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 21.2s Time] [2021-11-23 17:44:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13804 states. [2021-11-23 17:44:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13804 to 13804. [2021-11-23 17:44:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13804 states, 13803 states have (on average 1.1625733536187786) internal successors, (16047), 13803 states have internal predecessors, (16047), 0 states have call successors, (0), 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 17:44:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13804 states to 13804 states and 16047 transitions. [2021-11-23 17:44:11,025 INFO L78 Accepts]: Start accepts. Automaton has 13804 states and 16047 transitions. Word has length 915 [2021-11-23 17:44:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:11,027 INFO L470 AbstractCegarLoop]: Abstraction has 13804 states and 16047 transitions. [2021-11-23 17:44:11,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 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 17:44:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 13804 states and 16047 transitions. [2021-11-23 17:44:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2021-11-23 17:44:11,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:11,095 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:11,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:11,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:11,304 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:11,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1036158043, now seen corresponding path program 1 times [2021-11-23 17:44:11,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:11,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093625411] [2021-11-23 17:44:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:11,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:11,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:11,313 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:11,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:44:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:11,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:44:11,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 17:44:14,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:14,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:14,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093625411] [2021-11-23 17:44:14,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093625411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:14,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:44:14,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:44:14,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682131089] [2021-11-23 17:44:14,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:14,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:44:14,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:44:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:44:14,639 INFO L87 Difference]: Start difference. First operand 13804 states and 16047 transitions. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 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 17:44:35,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:35,857 INFO L93 Difference]: Finished difference Result 26226 states and 30708 transitions. [2021-11-23 17:44:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:44:35,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 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 922 [2021-11-23 17:44:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:35,894 INFO L225 Difference]: With dead ends: 26226 [2021-11-23 17:44:35,894 INFO L226 Difference]: Without dead ends: 13804 [2021-11-23 17:44:35,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 919 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:44:35,905 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 953 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:35,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [953 Valid, 605 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3097 Invalid, 0 Unknown, 0 Unchecked, 21.0s Time] [2021-11-23 17:44:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13804 states. [2021-11-23 17:44:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13804 to 13804. [2021-11-23 17:44:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13804 states, 13803 states have (on average 1.161269289284938) internal successors, (16029), 13803 states have internal predecessors, (16029), 0 states have call successors, (0), 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 17:44:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13804 states to 13804 states and 16029 transitions. [2021-11-23 17:44:36,132 INFO L78 Accepts]: Start accepts. Automaton has 13804 states and 16029 transitions. Word has length 922 [2021-11-23 17:44:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:36,133 INFO L470 AbstractCegarLoop]: Abstraction has 13804 states and 16029 transitions. [2021-11-23 17:44:36,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 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 17:44:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 13804 states and 16029 transitions. [2021-11-23 17:44:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1045 [2021-11-23 17:44:36,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:36,151 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:36,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:36,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:36,366 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:36,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:36,367 INFO L85 PathProgramCache]: Analyzing trace with hash 145919294, now seen corresponding path program 1 times [2021-11-23 17:44:36,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:36,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221676881] [2021-11-23 17:44:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:36,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:36,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:36,372 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:36,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:44:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:36,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:44:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 149 proven. 396 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 17:44:43,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 494 proven. 51 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 17:44:48,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:48,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221676881] [2021-11-23 17:44:48,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221676881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:48,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659928340] [2021-11-23 17:44:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:48,399 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:48,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:48,405 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:48,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:44:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:49,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:44:49,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-23 17:44:51,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:51,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1659928340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:51,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:44:51,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 13 [2021-11-23 17:44:51,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024937830] [2021-11-23 17:44:51,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:51,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:44:51,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:44:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:44:51,705 INFO L87 Difference]: Start difference. First operand 13804 states and 16029 transitions. Second operand has 7 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 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 17:45:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:25,958 INFO L93 Difference]: Finished difference Result 29144 states and 34751 transitions. [2021-11-23 17:45:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:45:25,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 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 1044 [2021-11-23 17:45:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:25,990 INFO L225 Difference]: With dead ends: 29144 [2021-11-23 17:45:25,991 INFO L226 Difference]: Without dead ends: 15184 [2021-11-23 17:45:26,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3131 GetRequests, 3119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:45:26,003 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 2771 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 4506 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2771 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 5911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 4506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:26,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2771 Valid, 855 Invalid, 5911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1405 Valid, 4506 Invalid, 0 Unknown, 0 Unchecked, 34.0s Time] [2021-11-23 17:45:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15184 states. [2021-11-23 17:45:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15184 to 15184. [2021-11-23 17:45:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15184 states, 15183 states have (on average 1.0589475070802872) internal successors, (16078), 15183 states have internal predecessors, (16078), 0 states have call successors, (0), 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 17:45:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15184 states to 15184 states and 16078 transitions. [2021-11-23 17:45:26,245 INFO L78 Accepts]: Start accepts. Automaton has 15184 states and 16078 transitions. Word has length 1044 [2021-11-23 17:45:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:26,246 INFO L470 AbstractCegarLoop]: Abstraction has 15184 states and 16078 transitions. [2021-11-23 17:45:26,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 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 17:45:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 15184 states and 16078 transitions. [2021-11-23 17:45:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1069 [2021-11-23 17:45:26,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:26,261 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:45:26,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:26,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:26,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:26,664 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1636593510, now seen corresponding path program 1 times [2021-11-23 17:45:26,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:26,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453956224] [2021-11-23 17:45:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:26,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:26,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:26,672 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:26,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:45:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:27,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:45:27,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-11-23 17:45:28,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:28,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:28,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453956224] [2021-11-23 17:45:28,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453956224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:28,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:45:28,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:45:28,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792288627] [2021-11-23 17:45:28,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:28,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:45:28,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:45:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:45:28,428 INFO L87 Difference]: Start difference. First operand 15184 states and 16078 transitions. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 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 17:45:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:42,356 INFO L93 Difference]: Finished difference Result 32436 states and 34709 transitions. [2021-11-23 17:45:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:45:42,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 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 1068 [2021-11-23 17:45:42,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:42,473 INFO L225 Difference]: With dead ends: 32436 [2021-11-23 17:45:42,473 INFO L226 Difference]: Without dead ends: 18634 [2021-11-23 17:45:42,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1067 GetRequests, 1066 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 17:45:42,496 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 685 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:42,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 986 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1720 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2021-11-23 17:45:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18634 states. [2021-11-23 17:45:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18634 to 18634. [2021-11-23 17:45:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18634 states, 18633 states have (on average 1.0530242043685933) internal successors, (19621), 18633 states have internal predecessors, (19621), 0 states have call successors, (0), 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 17:45:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 19621 transitions. [2021-11-23 17:45:42,794 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 19621 transitions. Word has length 1068 [2021-11-23 17:45:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:42,796 INFO L470 AbstractCegarLoop]: Abstraction has 18634 states and 19621 transitions. [2021-11-23 17:45:42,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 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 17:45:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 19621 transitions. [2021-11-23 17:45:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1241 [2021-11-23 17:45:42,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:42,818 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:45:42,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:43,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:43,037 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:43,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1060804730, now seen corresponding path program 1 times [2021-11-23 17:45:43,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:43,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159381782] [2021-11-23 17:45:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:43,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:43,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:43,046 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:43,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:45:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:43,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 1330 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:45:43,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 665 proven. 631 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2021-11-23 17:45:50,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 1018 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2021-11-23 17:45:53,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:53,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159381782] [2021-11-23 17:45:53,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159381782] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:45:53,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:45:53,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 17:45:53,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570536951] [2021-11-23 17:45:53,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:53,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:45:53,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:45:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:45:53,733 INFO L87 Difference]: Start difference. First operand 18634 states and 19621 transitions. Second operand has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 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 17:46:09,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:46:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:46:18,535 INFO L93 Difference]: Finished difference Result 42096 states and 44276 transitions. [2021-11-23 17:46:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:46:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 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 1240 [2021-11-23 17:46:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:46:18,601 INFO L225 Difference]: With dead ends: 42096 [2021-11-23 17:46:18,602 INFO L226 Difference]: Without dead ends: 24844 [2021-11-23 17:46:18,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2478 GetRequests, 2474 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:46:18,610 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 598 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:46:18,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 38 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 24.7s Time] [2021-11-23 17:46:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2021-11-23 17:46:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24844. [2021-11-23 17:46:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24844 states, 24843 states have (on average 1.043956043956044) internal successors, (25935), 24843 states have internal predecessors, (25935), 0 states have call successors, (0), 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 17:46:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24844 states to 24844 states and 25935 transitions. [2021-11-23 17:46:19,055 INFO L78 Accepts]: Start accepts. Automaton has 24844 states and 25935 transitions. Word has length 1240 [2021-11-23 17:46:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:46:19,056 INFO L470 AbstractCegarLoop]: Abstraction has 24844 states and 25935 transitions. [2021-11-23 17:46:19,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 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 17:46:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 24844 states and 25935 transitions. [2021-11-23 17:46:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1253 [2021-11-23 17:46:19,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:46:19,078 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:19,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:19,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:46:19,298 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:46:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:46:19,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2061907132, now seen corresponding path program 1 times [2021-11-23 17:46:19,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:46:19,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407615192] [2021-11-23 17:46:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:19,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:46:19,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:46:19,306 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:46:19,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:46:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:46:19,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 1063 proven. 0 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2021-11-23 17:46:21,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:46:21,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:46:21,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407615192] [2021-11-23 17:46:21,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407615192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:46:21,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:46:21,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:46:21,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049917247] [2021-11-23 17:46:21,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:46:21,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:46:21,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:46:21,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:46:21,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:46:21,394 INFO L87 Difference]: Start difference. First operand 24844 states and 25935 transitions. Second operand has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 17:46:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:46:35,395 INFO L93 Difference]: Finished difference Result 57276 states and 60081 transitions. [2021-11-23 17:46:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:46:35,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 1252 [2021-11-23 17:46:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:46:35,426 INFO L225 Difference]: With dead ends: 57276 [2021-11-23 17:46:35,426 INFO L226 Difference]: Without dead ends: 33814 [2021-11-23 17:46:35,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1251 GetRequests, 1250 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 17:46:35,438 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 605 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:46:35,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 998 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2021-11-23 17:46:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33814 states. [2021-11-23 17:46:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33814 to 33814. [2021-11-23 17:46:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33814 states, 33813 states have (on average 1.0411675982610238) internal successors, (35205), 33813 states have internal predecessors, (35205), 0 states have call successors, (0), 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 17:46:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33814 states to 33814 states and 35205 transitions. [2021-11-23 17:46:35,897 INFO L78 Accepts]: Start accepts. Automaton has 33814 states and 35205 transitions. Word has length 1252 [2021-11-23 17:46:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:46:35,898 INFO L470 AbstractCegarLoop]: Abstraction has 33814 states and 35205 transitions. [2021-11-23 17:46:35,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 17:46:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 33814 states and 35205 transitions. [2021-11-23 17:46:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1257 [2021-11-23 17:46:36,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:46:36,014 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:36,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:36,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:46:36,215 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:46:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:46:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1612796512, now seen corresponding path program 1 times [2021-11-23 17:46:36,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:46:36,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494999839] [2021-11-23 17:46:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:36,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:46:36,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:46:36,222 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:46:36,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:46:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:36,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:46:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 448 proven. 1013 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-23 17:46:40,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 1079 proven. 104 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2021-11-23 17:46:49,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:46:49,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494999839] [2021-11-23 17:46:49,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494999839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:49,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [373623510] [2021-11-23 17:46:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:49,169 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:46:49,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:46:49,171 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:46:49,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:46:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:49,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:46:49,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 1310 trivial. 0 not checked. [2021-11-23 17:46:51,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:46:51,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [373623510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:46:51,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:46:51,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 9 [2021-11-23 17:46:51,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311861086] [2021-11-23 17:46:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:46:51,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:46:51,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:46:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:46:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:46:51,169 INFO L87 Difference]: Start difference. First operand 33814 states and 35205 transitions. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 17:47:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:47:03,410 INFO L93 Difference]: Finished difference Result 73146 states and 76710 transitions. [2021-11-23 17:47:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:47:03,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 1256 [2021-11-23 17:47:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:47:03,591 INFO L225 Difference]: With dead ends: 73146 [2021-11-23 17:47:03,591 INFO L226 Difference]: Without dead ends: 37264 [2021-11-23 17:47:03,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3765 GetRequests, 3758 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:47:03,620 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 623 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:47:03,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 951 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2021-11-23 17:47:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37264 states. [2021-11-23 17:47:03,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37264 to 37264. [2021-11-23 17:47:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37264 states, 37263 states have (on average 1.0401202264981348) internal successors, (38758), 37263 states have internal predecessors, (38758), 0 states have call successors, (0), 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 17:47:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37264 states to 37264 states and 38758 transitions. [2021-11-23 17:47:04,001 INFO L78 Accepts]: Start accepts. Automaton has 37264 states and 38758 transitions. Word has length 1256 [2021-11-23 17:47:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:47:04,002 INFO L470 AbstractCegarLoop]: Abstraction has 37264 states and 38758 transitions. [2021-11-23 17:47:04,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 17:47:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 37264 states and 38758 transitions. [2021-11-23 17:47:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1274 [2021-11-23 17:47:04,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:47:04,020 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:04,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:04,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-23 17:47:04,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:47:04,422 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:47:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:47:04,423 INFO L85 PathProgramCache]: Analyzing trace with hash 188061930, now seen corresponding path program 1 times [2021-11-23 17:47:04,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:47:04,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506542676] [2021-11-23 17:47:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:04,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:47:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:47:04,430 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:47:04,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:47:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:47:04,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 917 proven. 0 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2021-11-23 17:47:06,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:47:06,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:47:06,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506542676] [2021-11-23 17:47:06,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506542676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:47:06,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:47:06,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:47:06,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082015021] [2021-11-23 17:47:06,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:47:06,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:47:06,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:47:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:47:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:47:06,514 INFO L87 Difference]: Start difference. First operand 37264 states and 38758 transitions. Second operand has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 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 17:47:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:47:20,960 INFO L93 Difference]: Finished difference Result 83496 states and 87163 transitions. [2021-11-23 17:47:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:47:20,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 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 1273 [2021-11-23 17:47:20,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:47:21,013 INFO L225 Difference]: With dead ends: 83496 [2021-11-23 17:47:21,013 INFO L226 Difference]: Without dead ends: 46924 [2021-11-23 17:47:21,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1272 GetRequests, 1271 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 17:47:21,030 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 573 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:47:21,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 979 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2021-11-23 17:47:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46924 states. [2021-11-23 17:47:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46924 to 44164. [2021-11-23 17:47:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44164 states, 44163 states have (on average 1.0395806444308584) internal successors, (45911), 44163 states have internal predecessors, (45911), 0 states have call successors, (0), 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 17:47:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44164 states to 44164 states and 45911 transitions. [2021-11-23 17:47:21,638 INFO L78 Accepts]: Start accepts. Automaton has 44164 states and 45911 transitions. Word has length 1273 [2021-11-23 17:47:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:47:21,639 INFO L470 AbstractCegarLoop]: Abstraction has 44164 states and 45911 transitions. [2021-11-23 17:47:21,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 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 17:47:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 44164 states and 45911 transitions. [2021-11-23 17:47:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1305 [2021-11-23 17:47:21,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:47:21,659 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:21,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 17:47:21,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:47:21,861 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:47:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:47:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1473468222, now seen corresponding path program 1 times [2021-11-23 17:47:21,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:47:21,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543037233] [2021-11-23 17:47:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:21,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:47:21,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:47:21,869 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:47:21,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:47:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:47:22,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 841 proven. 691 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-11-23 17:47:25,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:47:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1532 proven. 0 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-11-23 17:47:38,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:47:38,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543037233] [2021-11-23 17:47:38,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543037233] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:47:38,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:47:38,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-11-23 17:47:38,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187218638] [2021-11-23 17:47:38,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:47:38,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:47:38,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:47:38,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:47:38,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:47:38,462 INFO L87 Difference]: Start difference. First operand 44164 states and 45911 transitions. Second operand has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 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 17:47:55,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:47:58,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:47:59,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:00,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:05,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:10,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:12,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:18,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:21,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:27,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:31,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:38,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:40,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:46,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:50,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:48:57,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:14,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:15,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:21,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:22,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:24,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:25,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:26,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:28,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:32,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:34,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:35,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:40,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:42,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:45,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:47,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:49,863 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:51,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:53,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:49:57,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:02,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:07,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:10,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:12,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:14,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:19,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:30,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:35,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:38,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:46,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:53,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:55,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:56,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:00,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:03,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:08,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:19,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:23,026 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:25,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:27,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:30,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:35,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:37,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:41,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:46,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:52,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:54,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:57,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:58,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:02,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:07,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:09,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:16,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:20,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:52:22,736 INFO L93 Difference]: Finished difference Result 109026 states and 113931 transitions. [2021-11-23 17:52:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:52:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 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 1304 [2021-11-23 17:52:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:52:22,789 INFO L225 Difference]: With dead ends: 109026 [2021-11-23 17:52:22,790 INFO L226 Difference]: Without dead ends: 66244 [2021-11-23 17:52:22,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2606 GetRequests, 2601 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:52:22,808 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1200 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 3197 mSolverCounterSat, 748 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 3953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 3197 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 283.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:52:22,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 69 Invalid, 3953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 3197 Invalid, 8 Unknown, 0 Unchecked, 283.8s Time] [2021-11-23 17:52:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66244 states. [2021-11-23 17:52:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66244 to 51754. [2021-11-23 17:52:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51754 states, 51753 states have (on average 1.0385098448399126) internal successors, (53746), 51753 states have internal predecessors, (53746), 0 states have call successors, (0), 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 17:52:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51754 states to 51754 states and 53746 transitions. [2021-11-23 17:52:23,579 INFO L78 Accepts]: Start accepts. Automaton has 51754 states and 53746 transitions. Word has length 1304 [2021-11-23 17:52:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:52:23,580 INFO L470 AbstractCegarLoop]: Abstraction has 51754 states and 53746 transitions. [2021-11-23 17:52:23,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 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 17:52:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 51754 states and 53746 transitions. [2021-11-23 17:52:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1428 [2021-11-23 17:52:23,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:52:23,600 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:23,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:52:23,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:52:23,812 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:52:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:52:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1788788515, now seen corresponding path program 1 times [2021-11-23 17:52:23,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:52:23,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95377683] [2021-11-23 17:52:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:52:23,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:52:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:52:23,819 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:52:23,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:52:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:52:24,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:52:24,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:52:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 1139 proven. 1013 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-11-23 17:52:28,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:52:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 1770 proven. 104 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2021-11-23 17:52:37,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:52:37,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95377683] [2021-11-23 17:52:37,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95377683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:52:37,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907556265] [2021-11-23 17:52:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:52:37,410 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:52:37,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:52:37,411 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:52:37,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:52:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:52:37,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:52:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:52:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 1193 proven. 606 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2021-11-23 17:52:43,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:52:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 1151 proven. 0 refuted. 0 times theorem prover too weak. 1394 trivial. 0 not checked. [2021-11-23 17:52:45,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [907556265] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:52:45,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:52:45,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4, 7] total 14 [2021-11-23 17:52:45,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605557659] [2021-11-23 17:52:45,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:52:45,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:52:45,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:52:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:52:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:52:45,466 INFO L87 Difference]: Start difference. First operand 51754 states and 53746 transitions. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 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 17:52:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:52:57,003 INFO L93 Difference]: Finished difference Result 118686 states and 123948 transitions. [2021-11-23 17:52:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:52:57,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 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 1427 [2021-11-23 17:52:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:52:57,086 INFO L225 Difference]: With dead ends: 118686 [2021-11-23 17:52:57,086 INFO L226 Difference]: Without dead ends: 68314 [2021-11-23 17:52:57,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5704 GetRequests, 5692 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:52:57,116 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 543 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:52:57,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 223 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-11-23 17:52:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68314 states. [2021-11-23 17:52:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68314 to 68314. [2021-11-23 17:52:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68314 states, 68313 states have (on average 1.037489204104636) internal successors, (70874), 68313 states have internal predecessors, (70874), 0 states have call successors, (0), 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 17:52:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68314 states to 68314 states and 70874 transitions. [2021-11-23 17:52:57,875 INFO L78 Accepts]: Start accepts. Automaton has 68314 states and 70874 transitions. Word has length 1427 [2021-11-23 17:52:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:52:57,876 INFO L470 AbstractCegarLoop]: Abstraction has 68314 states and 70874 transitions. [2021-11-23 17:52:57,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 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 17:52:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 68314 states and 70874 transitions. [2021-11-23 17:52:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1495 [2021-11-23 17:52:58,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:52:58,074 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:58,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-23 17:52:58,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:52:58,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:52:58,477 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:52:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:52:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1387179593, now seen corresponding path program 1 times [2021-11-23 17:52:58,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:52:58,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055491153] [2021-11-23 17:52:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:52:58,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:52:58,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:52:58,485 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:52:58,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_382aef32-f9a9-4fc2-8e48-84e90d659a8e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:52:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:52:58,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:52:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:53:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3183 backedges. 1581 proven. 1013 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-11-23 17:53:02,910 INFO L328 TraceCheckSpWp]: Computing backward predicates...