./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label15.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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/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 aacc76a5b8f972927524a85f8ea4b99cc049d27f5d90192cb961dbf1fd5d0c86 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:44:52,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:44:52,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:44:52,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:44:52,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:44:52,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:44:52,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:44:52,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:44:52,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:44:52,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:44:52,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:44:52,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:44:52,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:44:53,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:44:53,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:44:53,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:44:53,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:44:53,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:44:53,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:44:53,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:44:53,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:44:53,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:44:53,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:44:53,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:44:53,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:44:53,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:44:53,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:44:53,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:44:53,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:44:53,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:44:53,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:44:53,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:44:53,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:44:53,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:44:53,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:44:53,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:44:53,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:44:53,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:44:53,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:44:53,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:44:53,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:44:53,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:44:53,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:44:53,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:44:53,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:44:53,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:44:53,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:44:53,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:44:53,127 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:44:53,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:44:53,127 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:44:53,128 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:44:53,129 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:44:53,129 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:44:53,129 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:44:53,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:44:53,130 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:44:53,130 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:44:53,130 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:44:53,131 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:44:53,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:44:53,132 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:44:53,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:44:53,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:44:53,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:44:53,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:44:53,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:44:53,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:44:53,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:44:53,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:44:53,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:44:53,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:44:53,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:44:53,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:44:53,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:53,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:44:53,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:44:53,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:44:53,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:44:53,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:44:53,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:44:53,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:44:53,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:44:53,139 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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aacc76a5b8f972927524a85f8ea4b99cc049d27f5d90192cb961dbf1fd5d0c86 [2021-11-23 16:44:53,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:44:53,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:44:53,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:44:53,489 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:44:53,490 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:44:53,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label15.c [2021-11-23 16:44:53,553 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data/1e990fdc1/89afff21c45f4d08a446453c8ab2f494/FLAGd9c9c5b81 [2021-11-23 16:44:54,124 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:44:54,124 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/sv-benchmarks/c/eca-rers2012/Problem14_label15.c [2021-11-23 16:44:54,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data/1e990fdc1/89afff21c45f4d08a446453c8ab2f494/FLAGd9c9c5b81 [2021-11-23 16:44:54,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data/1e990fdc1/89afff21c45f4d08a446453c8ab2f494 [2021-11-23 16:44:54,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:44:54,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:44:54,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:54,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:44:54,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:44:54,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:54" (1/1) ... [2021-11-23 16:44:54,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65fbc935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:54, skipping insertion in model container [2021-11-23 16:44:54,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:54" (1/1) ... [2021-11-23 16:44:54,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:44:54,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:44:54,750 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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/sv-benchmarks/c/eca-rers2012/Problem14_label15.c[6619,6632] [2021-11-23 16:44:54,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:54,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:44:54,992 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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/sv-benchmarks/c/eca-rers2012/Problem14_label15.c[6619,6632] [2021-11-23 16:44:55,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:55,094 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:44:55,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55 WrapperNode [2021-11-23 16:44:55,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:55,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:55,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:44:55,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:44:55,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,230 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-11-23 16:44:55,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:55,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:44:55,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:44:55,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:44:55,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:44:55,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:44:55,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:44:55,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:44:55,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:55,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:44:55,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:44:55,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:44:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:44:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:44:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:44:55,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:44:55,647 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:44:55,649 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:44:57,069 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:44:57,158 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:44:57,163 INFO L158 Benchmark]: Toolchain (without parser) took 2770.74ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 69.6MB in the beginning and 82.0MB in the end (delta: -12.3MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. [2021-11-23 16:44:57,163 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 109.1MB. Free memory is still 88.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:57,164 INFO L158 Benchmark]: CACSL2BoogieTranslator took 697.09ms. Allocated memory is still 109.1MB. Free memory was 69.4MB in the beginning and 62.7MB in the end (delta: 6.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 16:44:57,165 INFO L158 Benchmark]: Boogie Procedure Inliner took 135.39ms. Allocated memory is still 109.1MB. Free memory was 62.7MB in the beginning and 53.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 16:44:57,166 INFO L158 Benchmark]: Boogie Preprocessor took 194.16ms. Allocated memory is still 109.1MB. Free memory was 53.0MB in the beginning and 77.8MB in the end (delta: -24.8MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2021-11-23 16:44:57,167 INFO L158 Benchmark]: RCFGBuilder took 1734.34ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 77.8MB in the beginning and 82.0MB in the end (delta: -4.2MB). Peak memory consumption was 43.6MB. Max. memory is 16.1GB. [2021-11-23 16:44:57,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 109.1MB. Free memory is still 88.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 697.09ms. Allocated memory is still 109.1MB. Free memory was 69.4MB in the beginning and 62.7MB in the end (delta: 6.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 135.39ms. Allocated memory is still 109.1MB. Free memory was 62.7MB in the beginning and 53.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 194.16ms. Allocated memory is still 109.1MB. Free memory was 53.0MB in the beginning and 77.8MB in the end (delta: -24.8MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1734.34ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 77.8MB in the beginning and 82.0MB in the end (delta: -4.2MB). Peak memory consumption was 43.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:44:57,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/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 aacc76a5b8f972927524a85f8ea4b99cc049d27f5d90192cb961dbf1fd5d0c86 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:44:59,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:44:59,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:44:59,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:44:59,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:44:59,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:44:59,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:44:59,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:44:59,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:44:59,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:44:59,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:44:59,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:44:59,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:44:59,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:44:59,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:44:59,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:44:59,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:44:59,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:44:59,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:44:59,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:44:59,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:44:59,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:44:59,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:44:59,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:44:59,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:44:59,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:44:59,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:44:59,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:44:59,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:44:59,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:44:59,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:44:59,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:44:59,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:44:59,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:44:59,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:44:59,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:44:59,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:44:59,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:44:59,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:44:59,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:44:59,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:44:59,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:44:59,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:44:59,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:44:59,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:44:59,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:44:59,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:44:59,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:44:59,976 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:44:59,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:44:59,977 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:44:59,977 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:44:59,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:44:59,978 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:44:59,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:44:59,980 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:44:59,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:44:59,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:44:59,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:44:59,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:44:59,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:44:59,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:44:59,982 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:44:59,982 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:44:59,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:44:59,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:44:59,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:44:59,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:44:59,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:44:59,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:44:59,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:44:59,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:59,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:44:59,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:44:59,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:44:59,985 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:44:59,986 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:44:59,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:44:59,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:44:59,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:44:59,987 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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aacc76a5b8f972927524a85f8ea4b99cc049d27f5d90192cb961dbf1fd5d0c86 [2021-11-23 16:45:00,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:00,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:00,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:00,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:00,383 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:00,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label15.c [2021-11-23 16:45:00,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data/b83b78844/f8d552f479b44deca9ea2f341aabf2fd/FLAGe4d79f2cb [2021-11-23 16:45:01,203 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:01,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/sv-benchmarks/c/eca-rers2012/Problem14_label15.c [2021-11-23 16:45:01,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data/b83b78844/f8d552f479b44deca9ea2f341aabf2fd/FLAGe4d79f2cb [2021-11-23 16:45:01,410 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/data/b83b78844/f8d552f479b44deca9ea2f341aabf2fd [2021-11-23 16:45:01,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:01,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:01,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:01,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:01,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:01,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:01" (1/1) ... [2021-11-23 16:45:01,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6202a92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:01, skipping insertion in model container [2021-11-23 16:45:01,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:01" (1/1) ... [2021-11-23 16:45:01,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:01,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:01,833 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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/sv-benchmarks/c/eca-rers2012/Problem14_label15.c[6619,6632] [2021-11-23 16:45:02,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:02,158 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:02,203 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_6c6f7e8d-0d73-4ece-96a7-b258e4399785/sv-benchmarks/c/eca-rers2012/Problem14_label15.c[6619,6632] [2021-11-23 16:45:02,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:02,351 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:02,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02 WrapperNode [2021-11-23 16:45:02,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:02,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:02,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:02,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:02,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,460 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2021-11-23 16:45:02,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:02,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:02,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:02,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:02,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:02,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:02,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:02,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:02,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:02,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:02,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:02,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:02,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:02,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:45:02,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:02,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:02,739 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:02,740 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:06,278 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:06,294 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:45:06,294 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:45:06,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:06 BoogieIcfgContainer [2021-11-23 16:45:06,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:45:06,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:45:06,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:45:06,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:45:06,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:01" (1/3) ... [2021-11-23 16:45:06,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630ea19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:06, skipping insertion in model container [2021-11-23 16:45:06,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (2/3) ... [2021-11-23 16:45:06,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630ea19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:06, skipping insertion in model container [2021-11-23 16:45:06,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:06" (3/3) ... [2021-11-23 16:45:06,307 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label15.c [2021-11-23 16:45:06,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:45:06,313 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:45:06,373 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:45:06,380 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:45:06,381 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:45:06,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 16:45:06,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:06,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:06,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-11-23 16:45:06,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:06,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371240946] [2021-11-23 16:45:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:06,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:06,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:06,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:06,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:45:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:06,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:06,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:06,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:06,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:06,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371240946] [2021-11-23 16:45:06,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371240946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:06,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:06,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:06,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609878083] [2021-11-23 16:45:06,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:06,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:06,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:06,948 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 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 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:10,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:10,833 INFO L93 Difference]: Finished difference Result 685 states and 1216 transitions. [2021-11-23 16:45:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-23 16:45:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:10,854 INFO L225 Difference]: With dead ends: 685 [2021-11-23 16:45:10,854 INFO L226 Difference]: Without dead ends: 360 [2021-11-23 16:45:10,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:10,863 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:10,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 139 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 16:45:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-23 16:45:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-23 16:45:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4206128133704736) internal successors, (510), 359 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 510 transitions. [2021-11-23 16:45:10,937 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 510 transitions. Word has length 65 [2021-11-23 16:45:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:10,938 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 510 transitions. [2021-11-23 16:45:10,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 510 transitions. [2021-11-23 16:45:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 16:45:10,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:10,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 16:45:10,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:11,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:11,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:11,151 INFO L85 PathProgramCache]: Analyzing trace with hash -454957106, now seen corresponding path program 1 times [2021-11-23 16:45:11,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:11,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652428350] [2021-11-23 16:45:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:11,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:11,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:11,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:11,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:45:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:11,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:11,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:11,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:11,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652428350] [2021-11-23 16:45:11,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652428350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:11,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:11,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:11,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868104116] [2021-11-23 16:45:11,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:11,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:11,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:11,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:11,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:11,854 INFO L87 Difference]: Start difference. First operand 360 states and 510 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:16,000 INFO L93 Difference]: Finished difference Result 1074 states and 1525 transitions. [2021-11-23 16:45:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:16,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-23 16:45:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:16,008 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 16:45:16,008 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 16:45:16,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:16,013 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 112 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:16,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 107 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 16:45:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 16:45:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 16:45:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.304895104895105) internal successors, (933), 715 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 933 transitions. [2021-11-23 16:45:16,060 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 933 transitions. Word has length 134 [2021-11-23 16:45:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:16,060 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 933 transitions. [2021-11-23 16:45:16,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 933 transitions. [2021-11-23 16:45:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 16:45:16,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:16,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 16:45:16,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:16,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:16,278 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash 244793277, now seen corresponding path program 1 times [2021-11-23 16:45:16,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:16,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611478785] [2021-11-23 16:45:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:16,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:16,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:16,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:45:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:16,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:16,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:17,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:17,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611478785] [2021-11-23 16:45:17,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611478785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:17,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:17,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:17,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319229923] [2021-11-23 16:45:17,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:17,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:17,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:17,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:17,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:17,179 INFO L87 Difference]: Start difference. First operand 716 states and 933 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:20,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:20,021 INFO L93 Difference]: Finished difference Result 1074 states and 1454 transitions. [2021-11-23 16:45:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:20,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-23 16:45:20,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:20,027 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 16:45:20,027 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 16:45:20,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:20,031 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 106 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:20,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 114 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 16:45:20,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 16:45:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 16:45:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.2965034965034965) internal successors, (927), 715 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 927 transitions. [2021-11-23 16:45:20,066 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 927 transitions. Word has length 139 [2021-11-23 16:45:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:20,066 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 927 transitions. [2021-11-23 16:45:20,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 927 transitions. [2021-11-23 16:45:20,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-23 16:45:20,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:20,073 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:20,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:20,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:20,285 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1601105154, now seen corresponding path program 1 times [2021-11-23 16:45:20,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:20,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131191916] [2021-11-23 16:45:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:20,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:20,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:20,303 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:20,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:45:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 16:45:20,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:20,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131191916] [2021-11-23 16:45:20,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131191916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:20,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:20,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:20,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854009989] [2021-11-23 16:45:20,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:20,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:20,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:20,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:20,940 INFO L87 Difference]: Start difference. First operand 716 states and 927 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:25,194 INFO L93 Difference]: Finished difference Result 1786 states and 2396 transitions. [2021-11-23 16:45:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:25,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-23 16:45:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:25,203 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 16:45:25,204 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 16:45:25,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:25,207 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:25,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 120 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 16:45:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 16:45:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2021-11-23 16:45:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.2465972778222578) internal successors, (1557), 1249 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1557 transitions. [2021-11-23 16:45:25,245 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1557 transitions. Word has length 200 [2021-11-23 16:45:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:25,246 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1557 transitions. [2021-11-23 16:45:25,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1557 transitions. [2021-11-23 16:45:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-23 16:45:25,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:25,251 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:25,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:25,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:25,462 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:25,463 INFO L85 PathProgramCache]: Analyzing trace with hash -880857925, now seen corresponding path program 1 times [2021-11-23 16:45:25,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:25,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852021005] [2021-11-23 16:45:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:25,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:25,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:25,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:25,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:45:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:25,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:45:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 16:45:27,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:27,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:27,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852021005] [2021-11-23 16:45:27,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852021005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:27,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:27,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:27,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96462208] [2021-11-23 16:45:27,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:27,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:27,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:27,016 INFO L87 Difference]: Start difference. First operand 1250 states and 1557 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:29,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:29,686 INFO L93 Difference]: Finished difference Result 2171 states and 2743 transitions. [2021-11-23 16:45:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:29,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 214 [2021-11-23 16:45:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:29,694 INFO L225 Difference]: With dead ends: 2171 [2021-11-23 16:45:29,694 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 16:45:29,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 211 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 16:45:29,697 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 112 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:29,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 113 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 16:45:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 16:45:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 16:45:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2399626517273576) internal successors, (1328), 1071 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1328 transitions. [2021-11-23 16:45:29,729 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1328 transitions. Word has length 214 [2021-11-23 16:45:29,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:29,729 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1328 transitions. [2021-11-23 16:45:29,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1328 transitions. [2021-11-23 16:45:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-23 16:45:29,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:29,739 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:29,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:29,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:29,954 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:29,955 INFO L85 PathProgramCache]: Analyzing trace with hash -350660326, now seen corresponding path program 1 times [2021-11-23 16:45:29,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:29,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254507028] [2021-11-23 16:45:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:29,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:29,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:29,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:29,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:45:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:30,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:30,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 16:45:31,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:31,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:31,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254507028] [2021-11-23 16:45:31,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254507028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:31,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:31,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:31,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295439098] [2021-11-23 16:45:31,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:31,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:31,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:31,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:31,622 INFO L87 Difference]: Start difference. First operand 1072 states and 1328 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:34,344 INFO L93 Difference]: Finished difference Result 1786 states and 2289 transitions. [2021-11-23 16:45:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:34,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 240 [2021-11-23 16:45:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:34,355 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 16:45:34,356 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 16:45:34,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:34,363 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:34,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 123 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 16:45:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 16:45:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 16:45:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2343604108309991) internal successors, (1322), 1071 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1322 transitions. [2021-11-23 16:45:34,397 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1322 transitions. Word has length 240 [2021-11-23 16:45:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:34,398 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1322 transitions. [2021-11-23 16:45:34,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1322 transitions. [2021-11-23 16:45:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-11-23 16:45:34,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:34,406 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 16:45:34,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:34,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:34,618 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1905705993, now seen corresponding path program 1 times [2021-11-23 16:45:34,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:34,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137562296] [2021-11-23 16:45:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:34,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:34,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:34,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:34,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:45:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:34,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 188 proven. 135 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 16:45:35,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 16:45:36,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:36,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137562296] [2021-11-23 16:45:36,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137562296] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:45:36,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:45:36,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 16:45:36,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186111449] [2021-11-23 16:45:36,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:36,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:36,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:36,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:36,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:36,797 INFO L87 Difference]: Start difference. First operand 1072 states and 1322 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:45,895 INFO L93 Difference]: Finished difference Result 2142 states and 2814 transitions. [2021-11-23 16:45:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:45,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 344 [2021-11-23 16:45:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:45,906 INFO L225 Difference]: With dead ends: 2142 [2021-11-23 16:45:45,906 INFO L226 Difference]: Without dead ends: 1428 [2021-11-23 16:45:45,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:45,909 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:45,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-23 16:45:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-23 16:45:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2021-11-23 16:45:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.2389628591450597) internal successors, (1768), 1427 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1768 transitions. [2021-11-23 16:45:45,951 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1768 transitions. Word has length 344 [2021-11-23 16:45:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:45,952 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1768 transitions. [2021-11-23 16:45:45,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1768 transitions. [2021-11-23 16:45:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-23 16:45:45,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:45,966 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:45,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:46,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:46,181 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash 803397611, now seen corresponding path program 1 times [2021-11-23 16:45:46,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:46,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506194309] [2021-11-23 16:45:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:46,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:46,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:46,187 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:46,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:45:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:46,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 465 proven. 159 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-23 16:45:47,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 624 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-23 16:45:49,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:49,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506194309] [2021-11-23 16:45:49,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506194309] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:45:49,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:45:49,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 16:45:49,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492846098] [2021-11-23 16:45:49,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:49,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:49,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:49,457 INFO L87 Difference]: Start difference. First operand 1428 states and 1768 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:56,950 INFO L93 Difference]: Finished difference Result 3210 states and 4153 transitions. [2021-11-23 16:45:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:56,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 455 [2021-11-23 16:45:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:56,962 INFO L225 Difference]: With dead ends: 3210 [2021-11-23 16:45:56,963 INFO L226 Difference]: Without dead ends: 2140 [2021-11-23 16:45:56,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:56,965 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:56,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 248 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-23 16:45:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-23 16:45:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2021-11-23 16:45:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.2473118279569892) internal successors, (2668), 2139 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2668 transitions. [2021-11-23 16:45:57,028 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2668 transitions. Word has length 455 [2021-11-23 16:45:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:57,029 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2668 transitions. [2021-11-23 16:45:57,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2668 transitions. [2021-11-23 16:45:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-11-23 16:45:57,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:57,035 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:57,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:57,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:57,249 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash -411634493, now seen corresponding path program 1 times [2021-11-23 16:45:57,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:57,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157493931] [2021-11-23 16:45:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:57,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:57,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:57,255 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:57,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:45:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:45:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 424 proven. 277 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-23 16:45:59,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 672 proven. 29 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-23 16:46:10,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:10,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157493931] [2021-11-23 16:46:10,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157493931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:10,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882626676] [2021-11-23 16:46:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:10,619 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:10,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:10,621 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:10,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 16:46:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:46:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 481 proven. 50 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-11-23 16:46:12,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 507 proven. 24 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-11-23 16:46:15,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [882626676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:15,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923909849] [2021-11-23 16:46:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:15,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:15,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:15,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:15,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 16:46:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:15,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:46:15,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 400 proven. 144 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 16:46:17,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 400 proven. 144 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 16:46:19,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923909849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:19,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:19,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 7, 4, 4] total 18 [2021-11-23 16:46:19,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407777368] [2021-11-23 16:46:19,519 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:19,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 16:46:19,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 16:46:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:46:19,527 INFO L87 Difference]: Start difference. First operand 2140 states and 2668 transitions. Second operand has 18 states, 18 states have (on average 53.166666666666664) internal successors, (957), 18 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:25,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:47:39,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:47:41,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:41,621 INFO L93 Difference]: Finished difference Result 5963 states and 7559 transitions. [2021-11-23 16:47:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 16:47:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 53.166666666666664) internal successors, (957), 18 states have internal predecessors, (957), 0 states have call successors, (0), 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 471 [2021-11-23 16:47:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:41,645 INFO L225 Difference]: With dead ends: 5963 [2021-11-23 16:47:41,645 INFO L226 Difference]: Without dead ends: 3922 [2021-11-23 16:47:41,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2837 GetRequests, 2809 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-11-23 16:47:41,649 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2187 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 4551 mSolverCounterSat, 1023 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2187 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 5574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 4551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:41,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2187 Valid, 104 Invalid, 5574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1023 Valid, 4551 Invalid, 0 Unknown, 0 Unchecked, 78.6s Time] [2021-11-23 16:47:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2021-11-23 16:47:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 3564. [2021-11-23 16:47:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 1.0847600336794836) internal successors, (3865), 3563 states have internal predecessors, (3865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 3865 transitions. [2021-11-23 16:47:41,761 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 3865 transitions. Word has length 471 [2021-11-23 16:47:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:41,762 INFO L470 AbstractCegarLoop]: Abstraction has 3564 states and 3865 transitions. [2021-11-23 16:47:41,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 53.166666666666664) internal successors, (957), 18 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 3865 transitions. [2021-11-23 16:47:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2021-11-23 16:47:41,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:41,770 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:41,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:42,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:42,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:42,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:42,387 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:42,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:42,388 INFO L85 PathProgramCache]: Analyzing trace with hash 457287795, now seen corresponding path program 1 times [2021-11-23 16:47:42,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:42,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977444018] [2021-11-23 16:47:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:42,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:42,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:42,392 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:42,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:47:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:42,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:47:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 314 proven. 898 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 16:47:52,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 944 proven. 268 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 16:48:20,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:20,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977444018] [2021-11-23 16:48:20,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977444018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:20,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1412357274] [2021-11-23 16:48:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:20,844 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:20,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:48:20,855 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:48:20,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 16:48:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:48:21,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 16:48:22,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:22,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1412357274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:22,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:48:22,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 10] total 21 [2021-11-23 16:48:22,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603015854] [2021-11-23 16:48:22,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:22,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:48:22,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:48:22,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-11-23 16:48:22,265 INFO L87 Difference]: Start difference. First operand 3564 states and 3865 transitions. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:28,181 INFO L93 Difference]: Finished difference Result 7660 states and 8483 transitions. [2021-11-23 16:48:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:48:28,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 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 719 [2021-11-23 16:48:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:28,203 INFO L225 Difference]: With dead ends: 7660 [2021-11-23 16:48:28,203 INFO L226 Difference]: Without dead ends: 4810 [2021-11-23 16:48:28,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2156 GetRequests, 2136 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-11-23 16:48:28,208 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 306 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:28,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 19 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-23 16:48:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2021-11-23 16:48:28,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 4810. [2021-11-23 16:48:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4809 states have (on average 1.082761488875026) internal successors, (5207), 4809 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 5207 transitions. [2021-11-23 16:48:28,316 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 5207 transitions. Word has length 719 [2021-11-23 16:48:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:28,317 INFO L470 AbstractCegarLoop]: Abstraction has 4810 states and 5207 transitions. [2021-11-23 16:48:28,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 5207 transitions. [2021-11-23 16:48:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2021-11-23 16:48:28,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:28,352 INFO L514 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 16:48:28,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:28,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-23 16:48:28,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:28,765 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1201891340, now seen corresponding path program 1 times [2021-11-23 16:48:28,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:28,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989697189] [2021-11-23 16:48:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:28,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:28,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:28,770 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:28,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:48:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:48:29,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 553 proven. 1915 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-23 16:48:39,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 1646 proven. 822 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-23 16:49:06,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:06,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989697189] [2021-11-23 16:49:06,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989697189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:06,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1507202425] [2021-11-23 16:49:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:06,079 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:06,086 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:06,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 16:49:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:49:06,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 1095 proven. 63 refuted. 0 times theorem prover too weak. 1489 trivial. 0 not checked. [2021-11-23 16:49:08,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 1095 proven. 63 refuted. 0 times theorem prover too weak. 1489 trivial. 0 not checked. [2021-11-23 16:49:10,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1507202425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862771358] [2021-11-23 16:49:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:10,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:10,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:10,742 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:10,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 16:49:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:11,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:49:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 1460 proven. 72 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 16:49:15,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 1460 proven. 72 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 16:49:20,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862771358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:20,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:49:20,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 5, 5, 5, 5] total 28 [2021-11-23 16:49:20,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528251879] [2021-11-23 16:49:20,058 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:20,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 16:49:20,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 16:49:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-11-23 16:49:20,064 INFO L87 Difference]: Start difference. First operand 4810 states and 5207 transitions. Second operand has 28 states, 28 states have (on average 71.03571428571429) internal successors, (1989), 28 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:43,031 INFO L93 Difference]: Finished difference Result 11322 states and 12388 transitions. [2021-11-23 16:49:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 16:49:43,040 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 71.03571428571429) internal successors, (1989), 28 states have internal predecessors, (1989), 0 states have call successors, (0), 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 959 [2021-11-23 16:49:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:43,080 INFO L225 Difference]: With dead ends: 11322 [2021-11-23 16:49:43,081 INFO L226 Difference]: Without dead ends: 7226 [2021-11-23 16:49:43,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5796 GetRequests, 5739 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=537, Invalid=2885, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 16:49:43,087 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2495 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 10258 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2495 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 10591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 10258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:43,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2495 Valid, 208 Invalid, 10591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 10258 Invalid, 0 Unknown, 0 Unchecked, 20.4s Time] [2021-11-23 16:49:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-11-23 16:49:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 6581. [2021-11-23 16:49:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6581 states, 6580 states have (on average 1.0810030395136778) internal successors, (7113), 6580 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 7113 transitions. [2021-11-23 16:49:43,298 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 7113 transitions. Word has length 959 [2021-11-23 16:49:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:43,299 INFO L470 AbstractCegarLoop]: Abstraction has 6581 states and 7113 transitions. [2021-11-23 16:49:43,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.03571428571429) internal successors, (1989), 28 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 7113 transitions. [2021-11-23 16:49:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2021-11-23 16:49:43,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:43,320 INFO L514 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:43,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:43,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-23 16:49:43,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 16:49:43,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:43,931 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:43,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:43,932 INFO L85 PathProgramCache]: Analyzing trace with hash -328416263, now seen corresponding path program 1 times [2021-11-23 16:49:43,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:43,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390513641] [2021-11-23 16:49:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:43,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:43,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:43,936 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:43,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:49:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:49:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 1665 proven. 420 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2021-11-23 16:49:51,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 2085 proven. 0 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2021-11-23 16:50:16,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:16,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390513641] [2021-11-23 16:50:16,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390513641] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:50:16,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:50:16,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2021-11-23 16:50:16,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346721586] [2021-11-23 16:50:16,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:16,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 16:50:16,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 16:50:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:50:16,598 INFO L87 Difference]: Start difference. First operand 6581 states and 7113 transitions. Second operand has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:20,566 INFO L93 Difference]: Finished difference Result 12968 states and 14032 transitions. [2021-11-23 16:50:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:50:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 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 984 [2021-11-23 16:50:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:20,601 INFO L225 Difference]: With dead ends: 12968 [2021-11-23 16:50:20,601 INFO L226 Difference]: Without dead ends: 6736 [2021-11-23 16:50:20,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1966 GetRequests, 1949 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:50:20,610 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 321 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:20,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 244 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 16:50:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2021-11-23 16:50:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 6736. [2021-11-23 16:50:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6736 states, 6735 states have (on average 1.0789903489235337) internal successors, (7267), 6735 states have internal predecessors, (7267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6736 states to 6736 states and 7267 transitions. [2021-11-23 16:50:20,760 INFO L78 Accepts]: Start accepts. Automaton has 6736 states and 7267 transitions. Word has length 984 [2021-11-23 16:50:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:20,761 INFO L470 AbstractCegarLoop]: Abstraction has 6736 states and 7267 transitions. [2021-11-23 16:50:20,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6736 states and 7267 transitions. [2021-11-23 16:50:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2021-11-23 16:50:20,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:20,781 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:20,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:20,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:20,995 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash -238727648, now seen corresponding path program 1 times [2021-11-23 16:50:21,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:21,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481045186] [2021-11-23 16:50:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:21,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:21,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:21,002 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:21,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:50:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:50:21,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3318 backedges. 693 proven. 2339 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-23 16:50:32,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:23,195 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true [2021-11-23 16:56:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3318 backedges. 1416 proven. 894 refuted. 0 times theorem prover too weak. 224 trivial. 784 not checked. [2021-11-23 16:56:45,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481045186] [2021-11-23 16:56:45,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481045186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1493378884] [2021-11-23 16:56:45,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:45,205 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:45,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:45,207 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:45,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 16:56:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:45,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:56:45,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3318 backedges. 1252 proven. 47 refuted. 0 times theorem prover too weak. 2019 trivial. 0 not checked. [2021-11-23 16:56:48,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3318 backedges. 1287 proven. 12 refuted. 0 times theorem prover too weak. 2019 trivial. 0 not checked. [2021-11-23 16:56:50,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1493378884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:50,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797514769] [2021-11-23 16:56:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:50,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:50,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:50,853 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:56:50,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6f7e8d-0d73-4ece-96a7-b258e4399785/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 16:56:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:51,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:56:51,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3318 backedges. 143 proven. 360 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2021-11-23 16:56:54,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3318 backedges. 143 proven. 360 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2021-11-23 16:56:58,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797514769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:58,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:56:58,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 7, 7, 4, 4] total 33 [2021-11-23 16:56:58,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872312563] [2021-11-23 16:56:58,240 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:56:58,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 16:56:58,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 16:56:58,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=812, Unknown=1, NotChecked=60, Total=1056 [2021-11-23 16:56:58,246 INFO L87 Difference]: Start difference. First operand 6736 states and 7267 transitions. Second operand has 33 states, 33 states have (on average 55.484848484848484) internal successors, (1831), 33 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)