./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label13.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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/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 5a19424d0456c6718774c0e7f98c7314f15d1f859d3e4c4b58b43cec62bc198b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:29:06,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:29:06,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:29:06,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:29:06,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:29:06,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:29:06,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:29:06,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:29:06,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:29:06,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:29:06,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:29:06,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:29:06,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:29:06,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:29:07,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:29:07,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:29:07,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:29:07,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:29:07,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:29:07,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:29:07,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:29:07,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:29:07,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:29:07,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:29:07,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:29:07,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:29:07,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:29:07,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:29:07,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:29:07,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:29:07,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:29:07,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:29:07,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:29:07,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:29:07,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:29:07,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:29:07,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:29:07,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:29:07,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:29:07,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:29:07,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:29:07,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:29:07,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:29:07,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:29:07,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:29:07,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:29:07,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:29:07,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:29:07,109 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:29:07,109 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:29:07,109 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:29:07,109 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:29:07,110 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:29:07,111 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:29:07,111 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:29:07,111 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:29:07,111 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:29:07,112 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:29:07,112 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:29:07,112 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:29:07,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:29:07,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:29:07,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:29:07,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:29:07,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:29:07,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:29:07,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:29:07,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:29:07,117 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:29:07,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:29:07,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:29:07,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:29:07,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:29:07,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:29:07,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:29:07,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:29:07,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:29:07,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:29:07,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:29:07,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:29:07,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:29:07,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:29:07,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:29:07,120 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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a19424d0456c6718774c0e7f98c7314f15d1f859d3e4c4b58b43cec62bc198b [2021-11-23 17:29:07,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:29:07,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:29:07,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:29:07,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:29:07,556 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:29:07,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2021-11-23 17:29:07,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data/26ca33109/4b2fb57e35af4174a5ea3d114c88467f/FLAG2f40ae5c0 [2021-11-23 17:29:08,628 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:29:08,631 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2021-11-23 17:29:08,666 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data/26ca33109/4b2fb57e35af4174a5ea3d114c88467f/FLAG2f40ae5c0 [2021-11-23 17:29:09,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data/26ca33109/4b2fb57e35af4174a5ea3d114c88467f [2021-11-23 17:29:09,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:29:09,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:29:09,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:29:09,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:29:09,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:29:09,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:29:09" (1/1) ... [2021-11-23 17:29:09,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f57b394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:09, skipping insertion in model container [2021-11-23 17:29:09,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:29:09" (1/1) ... [2021-11-23 17:29:09,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:29:09,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:29:09,592 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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/sv-benchmarks/c/eca-rers2012/Problem15_label13.c[5940,5953] [2021-11-23 17:29:10,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:29:10,122 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:29:10,149 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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/sv-benchmarks/c/eca-rers2012/Problem15_label13.c[5940,5953] [2021-11-23 17:29:10,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:29:10,412 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:29:10,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10 WrapperNode [2021-11-23 17:29:10,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:29:10,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:29:10,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:29:10,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:29:10,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,648 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-11-23 17:29:10,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:29:10,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:29:10,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:29:10,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:29:10,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:29:10,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:29:10,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:29:10,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:29:10,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:10" (1/1) ... [2021-11-23 17:29:10,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:29:10,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:10,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:29:11,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:29:11,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:29:11,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:29:11,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:29:11,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:29:11,183 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:29:11,185 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:29:14,234 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:29:14,290 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:29:14,301 INFO L158 Benchmark]: Toolchain (without parser) took 5142.64ms. Allocated memory was 86.0MB in the beginning and 220.2MB in the end (delta: 134.2MB). Free memory was 41.7MB in the beginning and 97.0MB in the end (delta: -55.3MB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. [2021-11-23 17:29:14,301 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 86.0MB. Free memory is still 63.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:29:14,304 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1255.39ms. Allocated memory was 86.0MB in the beginning and 132.1MB in the end (delta: 46.1MB). Free memory was 41.5MB in the beginning and 97.9MB in the end (delta: -56.3MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. [2021-11-23 17:29:14,305 INFO L158 Benchmark]: Boogie Procedure Inliner took 235.04ms. Allocated memory is still 132.1MB. Free memory was 97.9MB in the beginning and 60.1MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2021-11-23 17:29:14,306 INFO L158 Benchmark]: Boogie Preprocessor took 304.31ms. Allocated memory is still 132.1MB. Free memory was 60.1MB in the beginning and 72.6MB in the end (delta: -12.5MB). Peak memory consumption was 26.2MB. Max. memory is 16.1GB. [2021-11-23 17:29:14,307 INFO L158 Benchmark]: RCFGBuilder took 3342.23ms. Allocated memory was 132.1MB in the beginning and 220.2MB in the end (delta: 88.1MB). Free memory was 72.6MB in the beginning and 97.0MB in the end (delta: -24.4MB). Peak memory consumption was 69.8MB. Max. memory is 16.1GB. [2021-11-23 17:29:14,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 86.0MB. Free memory is still 63.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1255.39ms. Allocated memory was 86.0MB in the beginning and 132.1MB in the end (delta: 46.1MB). Free memory was 41.5MB in the beginning and 97.9MB in the end (delta: -56.3MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 235.04ms. Allocated memory is still 132.1MB. Free memory was 97.9MB in the beginning and 60.1MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 304.31ms. Allocated memory is still 132.1MB. Free memory was 60.1MB in the beginning and 72.6MB in the end (delta: -12.5MB). Peak memory consumption was 26.2MB. Max. memory is 16.1GB. * RCFGBuilder took 3342.23ms. Allocated memory was 132.1MB in the beginning and 220.2MB in the end (delta: 88.1MB). Free memory was 72.6MB in the beginning and 97.0MB in the end (delta: -24.4MB). Peak memory consumption was 69.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:29:14,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/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 5a19424d0456c6718774c0e7f98c7314f15d1f859d3e4c4b58b43cec62bc198b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:29:17,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:29:17,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:29:17,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:29:17,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:29:17,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:29:17,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:29:17,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:29:17,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:29:17,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:29:17,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:29:17,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:29:17,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:29:17,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:29:17,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:29:17,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:29:17,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:29:17,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:29:17,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:29:17,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:29:17,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:29:17,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:29:17,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:29:17,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:29:17,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:29:17,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:29:17,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:29:17,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:29:17,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:29:17,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:29:17,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:29:17,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:29:17,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:29:17,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:29:17,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:29:17,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:29:17,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:29:17,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:29:17,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:29:17,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:29:17,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:29:17,405 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:29:17,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:29:17,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:29:17,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:29:17,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:29:17,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:29:17,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:29:17,466 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:29:17,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:29:17,466 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:29:17,466 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:29:17,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:29:17,468 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:29:17,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:29:17,471 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:29:17,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:29:17,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:29:17,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:29:17,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:29:17,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:29:17,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:29:17,472 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:29:17,473 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:29:17,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:29:17,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:29:17,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:29:17,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:29:17,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:29:17,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:29:17,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:29:17,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:29:17,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:29:17,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:29:17,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:29:17,477 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:29:17,477 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:17,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:29:17,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:29:17,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:29:17,478 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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a19424d0456c6718774c0e7f98c7314f15d1f859d3e4c4b58b43cec62bc198b [2021-11-23 17:29:17,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:29:17,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:29:17,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:29:17,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:29:17,971 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:29:17,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2021-11-23 17:29:18,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data/912e20e68/746d6e2bff0b4923a5cdb3a2c87325d1/FLAG93e804fd5 [2021-11-23 17:29:19,026 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:29:19,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2021-11-23 17:29:19,050 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data/912e20e68/746d6e2bff0b4923a5cdb3a2c87325d1/FLAG93e804fd5 [2021-11-23 17:29:19,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/data/912e20e68/746d6e2bff0b4923a5cdb3a2c87325d1 [2021-11-23 17:29:19,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:29:19,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:29:19,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:29:19,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:29:19,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:29:19,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:29:19" (1/1) ... [2021-11-23 17:29:19,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e991ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:19, skipping insertion in model container [2021-11-23 17:29:19,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:29:19" (1/1) ... [2021-11-23 17:29:19,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:29:19,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:29:19,459 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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/sv-benchmarks/c/eca-rers2012/Problem15_label13.c[5940,5953] [2021-11-23 17:29:20,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:29:20,186 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:29:20,231 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_c9543244-69e3-4879-a5bd-6bc4e6e6957c/sv-benchmarks/c/eca-rers2012/Problem15_label13.c[5940,5953] [2021-11-23 17:29:20,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:29:20,675 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:29:20,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20 WrapperNode [2021-11-23 17:29:20,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:29:20,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:29:20,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:29:20,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:29:20,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:20,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:20,910 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1755 [2021-11-23 17:29:20,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:29:20,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:29:20,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:29:20,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:29:20,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:20,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:20,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:20,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:21,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:21,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:21,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:21,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:29:21,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:29:21,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:29:21,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:29:21,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (1/1) ... [2021-11-23 17:29:21,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:29:21,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:21,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:29:21,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:29:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:29:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:29:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:29:21,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:29:21,362 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:29:21,364 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:29:40,645 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:29:40,664 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:29:40,664 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:29:40,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:29:40 BoogieIcfgContainer [2021-11-23 17:29:40,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:29:40,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:29:40,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:29:40,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:29:40,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:29:19" (1/3) ... [2021-11-23 17:29:40,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c887289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:29:40, skipping insertion in model container [2021-11-23 17:29:40,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:20" (2/3) ... [2021-11-23 17:29:40,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c887289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:29:40, skipping insertion in model container [2021-11-23 17:29:40,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:29:40" (3/3) ... [2021-11-23 17:29:40,678 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label13.c [2021-11-23 17:29:40,713 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:29:40,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:29:40,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:29:40,778 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:29:40,779 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:29:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 17:29:40,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:29:40,823 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] [2021-11-23 17:29:40,824 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:29:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:29:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash 563919826, now seen corresponding path program 1 times [2021-11-23 17:29:40,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:29:40,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762389805] [2021-11-23 17:29:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:40,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:29:40,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:29:40,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:29:40,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:29:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:40,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:29:40,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:41,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:29:41,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:29:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762389805] [2021-11-23 17:29:41,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762389805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:29:41,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:29:41,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:29:41,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177430283] [2021-11-23 17:29:41,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:29:41,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:29:41,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:41,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:29:41,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:29:41,393 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:06,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:06,143 INFO L93 Difference]: Finished difference Result 1153 states and 2105 transitions. [2021-11-23 17:30:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:30:06,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-23 17:30:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:06,168 INFO L225 Difference]: With dead ends: 1153 [2021-11-23 17:30:06,168 INFO L226 Difference]: Without dead ends: 664 [2021-11-23 17:30:06,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:30:06,179 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 272 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:06,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 24.6s Time] [2021-11-23 17:30:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-23 17:30:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 662. [2021-11-23 17:30:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.4826021180030258) internal successors, (980), 661 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 980 transitions. [2021-11-23 17:30:06,277 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 980 transitions. Word has length 48 [2021-11-23 17:30:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:06,278 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 980 transitions. [2021-11-23 17:30:06,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 980 transitions. [2021-11-23 17:30:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 17:30:06,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:06,286 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:30:06,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:06,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:30:06,500 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:06,501 INFO L85 PathProgramCache]: Analyzing trace with hash 15440365, now seen corresponding path program 1 times [2021-11-23 17:30:06,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:06,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473631307] [2021-11-23 17:30:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:06,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:06,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:06,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:06,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:30:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:30:06,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:07,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:30:07,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:07,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473631307] [2021-11-23 17:30:07,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473631307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:30:07,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:30:07,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:30:07,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003152691] [2021-11-23 17:30:07,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:30:07,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:30:07,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:07,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:30:07,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:30:07,269 INFO L87 Difference]: Start difference. First operand 662 states and 980 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:31,026 INFO L93 Difference]: Finished difference Result 1927 states and 2854 transitions. [2021-11-23 17:30:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:30:31,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-23 17:30:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:31,036 INFO L225 Difference]: With dead ends: 1927 [2021-11-23 17:30:31,036 INFO L226 Difference]: Without dead ends: 1267 [2021-11-23 17:30:31,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:30:31,041 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 261 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:31,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 318 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 23.7s Time] [2021-11-23 17:30:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-11-23 17:30:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2021-11-23 17:30:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.3045886075949367) internal successors, (1649), 1264 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1649 transitions. [2021-11-23 17:30:31,095 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1649 transitions. Word has length 113 [2021-11-23 17:30:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:31,096 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1649 transitions. [2021-11-23 17:30:31,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1649 transitions. [2021-11-23 17:30:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-23 17:30:31,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:31,107 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, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:30:31,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:31,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:30:31,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1580801279, now seen corresponding path program 1 times [2021-11-23 17:30:31,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:31,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247271387] [2021-11-23 17:30:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:31,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:31,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:31,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:31,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:30:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:31,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:30:31,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 120 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:30:35,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 120 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:30:38,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:38,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247271387] [2021-11-23 17:30:38,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247271387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:38,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901045131] [2021-11-23 17:30:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:38,259 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:38,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:38,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:38,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:30:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:38,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:30:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:30:41,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:30:41,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [901045131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:30:41,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:30:41,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2021-11-23 17:30:41,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047382459] [2021-11-23 17:30:41,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:30:41,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:30:41,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:41,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:30:41,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:30:41,189 INFO L87 Difference]: Start difference. First operand 1265 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 29.571428571428573) internal successors, (207), 7 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:13,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:15,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:27,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:28,940 INFO L93 Difference]: Finished difference Result 2633 states and 3623 transitions. [2021-11-23 17:31:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:31:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.571428571428573) internal successors, (207), 7 states have internal predecessors, (207), 0 states have call successors, (0), 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 17:31:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:28,971 INFO L225 Difference]: With dead ends: 2633 [2021-11-23 17:31:28,972 INFO L226 Difference]: Without dead ends: 1970 [2021-11-23 17:31:28,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:31:28,975 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 947 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 428 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:28,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 112 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 1516 Invalid, 1 Unknown, 0 Unchecked, 47.6s Time] [2021-11-23 17:31:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-11-23 17:31:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1870. [2021-11-23 17:31:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.3242375601926164) internal successors, (2475), 1869 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2475 transitions. [2021-11-23 17:31:29,051 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2475 transitions. Word has length 214 [2021-11-23 17:31:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:29,055 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2475 transitions. [2021-11-23 17:31:29,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.571428571428573) internal successors, (207), 7 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2475 transitions. [2021-11-23 17:31:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-23 17:31:29,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:29,067 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:31:29,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:29,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:29,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:29,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash -556771401, now seen corresponding path program 1 times [2021-11-23 17:31:29,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:29,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315853442] [2021-11-23 17:31:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:29,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:29,484 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:29,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:31:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:29,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:31:29,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 124 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:31:32,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 124 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:31:34,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:34,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315853442] [2021-11-23 17:31:34,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315853442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890894677] [2021-11-23 17:31:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:34,722 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:34,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:34,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:34,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:31:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:34,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:34,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:35,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:35,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [890894677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:35,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:31:35,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:31:35,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422400383] [2021-11-23 17:31:35,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:35,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:35,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:31:35,361 INFO L87 Difference]: Start difference. First operand 1870 states and 2475 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:54,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:54,880 INFO L93 Difference]: Finished difference Result 3736 states and 5168 transitions. [2021-11-23 17:31:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:54,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-23 17:31:54,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:54,900 INFO L225 Difference]: With dead ends: 3736 [2021-11-23 17:31:54,901 INFO L226 Difference]: Without dead ends: 2468 [2021-11-23 17:31:54,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:31:54,904 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 269 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:54,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 333 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 19.5s Time] [2021-11-23 17:31:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-11-23 17:31:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 2468. [2021-11-23 17:31:54,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 1.272800972841508) internal successors, (3140), 2467 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3140 transitions. [2021-11-23 17:31:54,969 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3140 transitions. Word has length 218 [2021-11-23 17:31:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:54,970 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3140 transitions. [2021-11-23 17:31:54,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3140 transitions. [2021-11-23 17:31:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-11-23 17:31:54,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:54,978 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:54,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-23 17:31:55,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:55,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:55,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2113612274, now seen corresponding path program 1 times [2021-11-23 17:31:55,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:55,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308655782] [2021-11-23 17:31:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:55,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:55,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:55,383 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:55,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:31:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:31:55,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 136 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:31:57,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 136 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:32:00,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:00,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308655782] [2021-11-23 17:32:00,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308655782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:00,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [778935037] [2021-11-23 17:32:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:00,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:00,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:00,271 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:00,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:32:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:00,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:32:00,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 96 proven. 46 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:32:02,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 17:32:03,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [778935037] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:32:03,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:32:03,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 7] total 12 [2021-11-23 17:32:03,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216963168] [2021-11-23 17:32:03,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:03,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:32:03,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:32:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:32:03,012 INFO L87 Difference]: Start difference. First operand 2468 states and 3140 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:39,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:43,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:48,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:53,978 INFO L93 Difference]: Finished difference Result 3971 states and 5166 transitions. [2021-11-23 17:32:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:32:53,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 335 [2021-11-23 17:32:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:54,015 INFO L225 Difference]: With dead ends: 3971 [2021-11-23 17:32:54,015 INFO L226 Difference]: Without dead ends: 3969 [2021-11-23 17:32:54,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1336 GetRequests, 1326 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:32:54,018 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 346 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:54,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 71 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 50.9s Time] [2021-11-23 17:32:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2021-11-23 17:32:54,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 2467. [2021-11-23 17:32:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2466 states have (on average 1.362530413625304) internal successors, (3360), 2466 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3360 transitions. [2021-11-23 17:32:54,116 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3360 transitions. Word has length 335 [2021-11-23 17:32:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:54,117 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 3360 transitions. [2021-11-23 17:32:54,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3360 transitions. [2021-11-23 17:32:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-23 17:32:54,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:54,125 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:54,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:54,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:54,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:54,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash 927918571, now seen corresponding path program 1 times [2021-11-23 17:32:54,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:54,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381703421] [2021-11-23 17:32:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:54,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:54,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:54,542 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:54,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:32:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:54,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:32:54,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 17:32:56,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:56,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:56,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381703421] [2021-11-23 17:32:56,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381703421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:56,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:56,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:32:56,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903783740] [2021-11-23 17:32:56,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:56,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:32:56,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:32:56,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:32:56,355 INFO L87 Difference]: Start difference. First operand 2467 states and 3360 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:13,106 INFO L93 Difference]: Finished difference Result 5231 states and 7029 transitions. [2021-11-23 17:33:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:33:13,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 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 350 [2021-11-23 17:33:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:13,135 INFO L225 Difference]: With dead ends: 5231 [2021-11-23 17:33:13,135 INFO L226 Difference]: Without dead ends: 2766 [2021-11-23 17:33:13,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:33:13,139 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:13,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 358 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time] [2021-11-23 17:33:13,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-11-23 17:33:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2766. [2021-11-23 17:33:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 1.3254972875226039) internal successors, (3665), 2765 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3665 transitions. [2021-11-23 17:33:13,205 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3665 transitions. Word has length 350 [2021-11-23 17:33:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:13,206 INFO L470 AbstractCegarLoop]: Abstraction has 2766 states and 3665 transitions. [2021-11-23 17:33:13,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3665 transitions. [2021-11-23 17:33:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-11-23 17:33:13,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:13,216 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:13,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:13,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:33:13,430 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:13,431 INFO L85 PathProgramCache]: Analyzing trace with hash -394712131, now seen corresponding path program 1 times [2021-11-23 17:33:13,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:13,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489718480] [2021-11-23 17:33:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:13,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:13,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:13,434 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:13,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:33:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:33:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:14,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:33:14,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:14,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489718480] [2021-11-23 17:33:14,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489718480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:33:14,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:33:14,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:33:14,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374081578] [2021-11-23 17:33:14,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:33:14,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:33:14,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:33:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:33:14,462 INFO L87 Difference]: Start difference. First operand 2766 states and 3665 transitions. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:35,976 INFO L93 Difference]: Finished difference Result 6437 states and 8757 transitions. [2021-11-23 17:33:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:33:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 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 424 [2021-11-23 17:33:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:36,011 INFO L225 Difference]: With dead ends: 6437 [2021-11-23 17:33:36,011 INFO L226 Difference]: Without dead ends: 3972 [2021-11-23 17:33:36,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:33:36,016 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 212 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:36,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 662 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 21.4s Time] [2021-11-23 17:33:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-11-23 17:33:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 3670. [2021-11-23 17:33:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 1.2804578904333606) internal successors, (4698), 3669 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 4698 transitions. [2021-11-23 17:33:36,100 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 4698 transitions. Word has length 424 [2021-11-23 17:33:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:36,101 INFO L470 AbstractCegarLoop]: Abstraction has 3670 states and 4698 transitions. [2021-11-23 17:33:36,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 4698 transitions. [2021-11-23 17:33:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-11-23 17:33:36,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:36,107 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:36,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:36,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:33:36,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:36,322 INFO L85 PathProgramCache]: Analyzing trace with hash -469350569, now seen corresponding path program 1 times [2021-11-23 17:33:36,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:36,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273701650] [2021-11-23 17:33:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:36,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:36,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:36,325 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:36,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:33:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:36,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:33:36,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 259 proven. 32 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-23 17:33:38,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 259 proven. 32 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-23 17:33:40,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:40,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273701650] [2021-11-23 17:33:40,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273701650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:40,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1359611551] [2021-11-23 17:33:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:40,675 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:40,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:40,676 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:40,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:33:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:40,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:33:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 287 proven. 41 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 17:33:42,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 287 proven. 41 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 17:33:43,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1359611551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:43,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109805434] [2021-11-23 17:33:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:43,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:43,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:33:43,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:33:43,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:33:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:33:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 287 proven. 41 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 17:33:44,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 287 proven. 41 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 17:33:46,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109805434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:46,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:33:46,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4, 4, 4, 4] total 8 [2021-11-23 17:33:46,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242158930] [2021-11-23 17:33:46,089 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:33:46,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:33:46,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:33:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:33:46,092 INFO L87 Difference]: Start difference. First operand 3670 states and 4698 transitions. Second operand has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:05,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:18,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:37,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:55,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:57,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:04,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:13,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:44,001 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:52,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:57,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:59,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:05,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:15,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:26,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:30,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:37,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:46,903 INFO L93 Difference]: Finished difference Result 13450 states and 17037 transitions. [2021-11-23 17:36:46,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 17:36:46,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 states have internal predecessors, (796), 0 states have call successors, (0), 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 441 [2021-11-23 17:36:46,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:46,964 INFO L225 Difference]: With dead ends: 13450 [2021-11-23 17:36:46,964 INFO L226 Difference]: Without dead ends: 9981 [2021-11-23 17:36:46,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2650 GetRequests, 2639 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:36:46,969 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 2184 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4946 mSolverCounterSat, 1193 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2184 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 6140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1193 IncrementalHoareTripleChecker+Valid, 4946 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:46,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2184 Valid, 241 Invalid, 6140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1193 Valid, 4946 Invalid, 1 Unknown, 0 Unchecked, 180.3s Time] [2021-11-23 17:36:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-11-23 17:36:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 5765. [2021-11-23 17:36:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5765 states, 5764 states have (on average 1.1734906315058986) internal successors, (6764), 5764 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 6764 transitions. [2021-11-23 17:36:47,147 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 6764 transitions. Word has length 441 [2021-11-23 17:36:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:47,148 INFO L470 AbstractCegarLoop]: Abstraction has 5765 states and 6764 transitions. [2021-11-23 17:36:47,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 6764 transitions. [2021-11-23 17:36:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2021-11-23 17:36:47,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:47,158 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:47,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:47,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-23 17:36:47,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-23 17:36:47,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:47,773 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1633675616, now seen corresponding path program 1 times [2021-11-23 17:36:47,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:47,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942293523] [2021-11-23 17:36:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:47,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:47,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:47,779 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:47,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:36:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:36:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 476 proven. 106 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-23 17:36:50,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 476 proven. 106 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-23 17:37:02,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:02,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942293523] [2021-11-23 17:37:02,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942293523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:02,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1602405703] [2021-11-23 17:37:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:02,911 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:02,912 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:02,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:37:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:37:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 419 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-11-23 17:37:04,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:37:04,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1602405703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:37:04,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:37:04,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:37:04,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353747417] [2021-11-23 17:37:04,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:37:04,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:37:04,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:04,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:37:04,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:37:04,156 INFO L87 Difference]: Start difference. First operand 5765 states and 6764 transitions. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:24,920 INFO L93 Difference]: Finished difference Result 13026 states and 15676 transitions. [2021-11-23 17:37:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:37:24,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 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 628 [2021-11-23 17:37:24,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:24,960 INFO L225 Difference]: With dead ends: 13026 [2021-11-23 17:37:24,960 INFO L226 Difference]: Without dead ends: 7562 [2021-11-23 17:37:24,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1881 GetRequests, 1876 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:37:24,966 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 247 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:24,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 587 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 20.7s Time] [2021-11-23 17:37:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7562 states. [2021-11-23 17:37:25,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7562 to 6665. [2021-11-23 17:37:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 1.1616146458583434) internal successors, (7741), 6664 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 7741 transitions. [2021-11-23 17:37:25,099 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 7741 transitions. Word has length 628 [2021-11-23 17:37:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:25,101 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 7741 transitions. [2021-11-23 17:37:25,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 7741 transitions. [2021-11-23 17:37:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2021-11-23 17:37:25,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:25,137 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:25,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:25,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:25,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:37:25,538 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:25,538 INFO L85 PathProgramCache]: Analyzing trace with hash -595460396, now seen corresponding path program 1 times [2021-11-23 17:37:25,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:25,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135807801] [2021-11-23 17:37:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:25,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:25,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:25,542 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:25,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:37:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:25,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:37:25,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 504 proven. 106 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-23 17:37:28,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 504 proven. 106 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-23 17:37:40,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:40,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135807801] [2021-11-23 17:37:40,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135807801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:40,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733560206] [2021-11-23 17:37:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:40,972 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:40,973 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:40,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:37:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:37:41,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-11-23 17:37:43,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:37:43,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733560206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:37:43,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:37:43,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3] total 10 [2021-11-23 17:37:43,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917402616] [2021-11-23 17:37:43,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:37:43,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:37:43,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:43,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:37:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:37:43,125 INFO L87 Difference]: Start difference. First operand 6665 states and 7741 transitions. Second operand has 6 states, 6 states have (on average 54.333333333333336) internal successors, (326), 6 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:49,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:37:56,671 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:38:00,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:38:08,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:38:22,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:38:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:36,275 INFO L93 Difference]: Finished difference Result 17988 states and 20955 transitions. [2021-11-23 17:38:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:38:36,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 54.333333333333336) internal successors, (326), 6 states have internal predecessors, (326), 0 states have call successors, (0), 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 644 [2021-11-23 17:38:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:36,308 INFO L225 Difference]: With dead ends: 17988 [2021-11-23 17:38:36,309 INFO L226 Difference]: Without dead ends: 9486 [2021-11-23 17:38:36,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1931 GetRequests, 1922 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:38:36,317 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 720 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 586 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:36,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 189 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 2964 Invalid, 1 Unknown, 0 Unchecked, 52.9s Time] [2021-11-23 17:38:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-11-23 17:38:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 9052. [2021-11-23 17:38:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9052 states, 9051 states have (on average 1.1373328913932161) internal successors, (10294), 9051 states have internal predecessors, (10294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9052 states to 9052 states and 10294 transitions. [2021-11-23 17:38:36,513 INFO L78 Accepts]: Start accepts. Automaton has 9052 states and 10294 transitions. Word has length 644 [2021-11-23 17:38:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:36,514 INFO L470 AbstractCegarLoop]: Abstraction has 9052 states and 10294 transitions. [2021-11-23 17:38:36,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.333333333333336) internal successors, (326), 6 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9052 states and 10294 transitions. [2021-11-23 17:38:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 667 [2021-11-23 17:38:36,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:36,576 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:36,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:36,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:36,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:38:36,977 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:36,978 INFO L85 PathProgramCache]: Analyzing trace with hash 369958870, now seen corresponding path program 1 times [2021-11-23 17:38:36,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:36,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715174056] [2021-11-23 17:38:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:36,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:36,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:36,983 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:36,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:38:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:38:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 540 proven. 106 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-23 17:38:39,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 540 proven. 106 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-23 17:38:52,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:52,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715174056] [2021-11-23 17:38:52,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715174056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:52,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1144676717] [2021-11-23 17:38:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:52,472 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:52,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:52,473 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:52,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:38:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:53,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:38:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 519 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-11-23 17:38:55,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:38:55,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1144676717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:38:55,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:38:55,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:38:55,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571451644] [2021-11-23 17:38:55,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:38:55,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:38:55,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:38:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:38:55,090 INFO L87 Difference]: Start difference. First operand 9052 states and 10294 transitions. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:08,911 INFO L93 Difference]: Finished difference Result 18102 states and 20610 transitions. [2021-11-23 17:39:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:08,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 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 666 [2021-11-23 17:39:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:08,947 INFO L225 Difference]: With dead ends: 18102 [2021-11-23 17:39:08,947 INFO L226 Difference]: Without dead ends: 9051 [2021-11-23 17:39:08,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1995 GetRequests, 1990 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:39:08,956 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 185 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:08,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 613 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2021-11-23 17:39:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9051 states. [2021-11-23 17:39:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9051 to 9051. [2021-11-23 17:39:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9051 states, 9050 states have (on average 1.1372375690607734) internal successors, (10292), 9050 states have internal predecessors, (10292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9051 states to 9051 states and 10292 transitions. [2021-11-23 17:39:09,166 INFO L78 Accepts]: Start accepts. Automaton has 9051 states and 10292 transitions. Word has length 666 [2021-11-23 17:39:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:09,167 INFO L470 AbstractCegarLoop]: Abstraction has 9051 states and 10292 transitions. [2021-11-23 17:39:09,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 9051 states and 10292 transitions. [2021-11-23 17:39:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2021-11-23 17:39:09,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:09,184 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:09,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-23 17:39:09,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:09,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:09,600 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:09,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1264015020, now seen corresponding path program 1 times [2021-11-23 17:39:09,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:09,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134229699] [2021-11-23 17:39:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:09,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:09,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:09,605 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:09,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:39:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:09,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:39:09,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 471 proven. 188 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 17:39:12,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 471 proven. 188 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 17:39:27,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:27,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134229699] [2021-11-23 17:39:27,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134229699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:27,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1004990781] [2021-11-23 17:39:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:27,204 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:39:27,205 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:39:27,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 17:39:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:27,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:39:27,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-11-23 17:39:28,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:28,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1004990781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:28,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:39:28,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:39:28,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690909222] [2021-11-23 17:39:28,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:28,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:28,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:28,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:28,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:39:28,672 INFO L87 Difference]: Start difference. First operand 9051 states and 10292 transitions. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:46,693 INFO L93 Difference]: Finished difference Result 17798 states and 20276 transitions. [2021-11-23 17:39:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:46,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 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 700 [2021-11-23 17:39:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:46,717 INFO L225 Difference]: With dead ends: 17798 [2021-11-23 17:39:46,717 INFO L226 Difference]: Without dead ends: 9048 [2021-11-23 17:39:46,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2097 GetRequests, 2092 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:39:46,726 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 210 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:46,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 553 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 17.9s Time] [2021-11-23 17:39:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9048 states. [2021-11-23 17:39:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9048 to 9048. [2021-11-23 17:39:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9048 states, 9047 states have (on average 1.0659887255443794) internal successors, (9644), 9047 states have internal predecessors, (9644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9048 states to 9048 states and 9644 transitions. [2021-11-23 17:39:46,886 INFO L78 Accepts]: Start accepts. Automaton has 9048 states and 9644 transitions. Word has length 700 [2021-11-23 17:39:46,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:46,887 INFO L470 AbstractCegarLoop]: Abstraction has 9048 states and 9644 transitions. [2021-11-23 17:39:46,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 9048 states and 9644 transitions. [2021-11-23 17:39:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2021-11-23 17:39:46,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:46,950 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:46,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:47,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:47,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:47,351 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash 94503474, now seen corresponding path program 1 times [2021-11-23 17:39:47,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:47,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419696613] [2021-11-23 17:39:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:47,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:47,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:47,374 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:47,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:39:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:47,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:39:47,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 695 proven. 106 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2021-11-23 17:39:50,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 695 proven. 106 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2021-11-23 17:40:03,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:03,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419696613] [2021-11-23 17:40:03,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419696613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:03,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1538474378] [2021-11-23 17:40:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:03,322 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:03,329 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:03,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 17:40:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:04,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:40:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2021-11-23 17:40:09,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:09,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1538474378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:09,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:40:09,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 17:40:09,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494022155] [2021-11-23 17:40:09,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:09,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:40:09,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:40:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:40:09,499 INFO L87 Difference]: Start difference. First operand 9048 states and 9644 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:28,846 INFO L93 Difference]: Finished difference Result 20831 states and 22131 transitions. [2021-11-23 17:40:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:40:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 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 737 [2021-11-23 17:40:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:28,856 INFO L225 Difference]: With dead ends: 20831 [2021-11-23 17:40:28,856 INFO L226 Difference]: Without dead ends: 12084 [2021-11-23 17:40:28,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2208 GetRequests, 2202 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:40:28,864 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 327 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:28,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 262 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 887 Invalid, 0 Unknown, 404 Unchecked, 19.2s Time] [2021-11-23 17:40:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12084 states. [2021-11-23 17:40:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12084 to 9347. [2021-11-23 17:40:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9346 states have (on average 1.0628076182323989) internal successors, (9933), 9346 states have internal predecessors, (9933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 9933 transitions. [2021-11-23 17:40:29,069 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 9933 transitions. Word has length 737 [2021-11-23 17:40:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:29,070 INFO L470 AbstractCegarLoop]: Abstraction has 9347 states and 9933 transitions. [2021-11-23 17:40:29,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 9933 transitions. [2021-11-23 17:40:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2021-11-23 17:40:29,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:29,091 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:29,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:29,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:29,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:29,499 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1217431788, now seen corresponding path program 1 times [2021-11-23 17:40:29,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:29,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748726675] [2021-11-23 17:40:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:29,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:29,504 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:29,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:40:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:29,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:40:29,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 621 proven. 188 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 17:40:32,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 621 proven. 188 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 17:40:47,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:47,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748726675] [2021-11-23 17:40:47,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748726675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:47,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1473121745] [2021-11-23 17:40:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:47,218 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:47,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:47,218 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:47,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:40:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:48,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:40:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 592 proven. 339 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 17:40:55,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 592 proven. 339 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 17:41:11,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1473121745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:11,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135630890] [2021-11-23 17:41:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:11,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:11,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:11,260 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:11,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9543244-69e3-4879-a5bd-6bc4e6e6957c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:41:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:11,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:41:11,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 621 proven. 188 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 17:41:16,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 621 proven. 188 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 17:41:32,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135630890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:32,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:41:32,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 6, 6, 4, 4] total 15 [2021-11-23 17:41:32,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570186252] [2021-11-23 17:41:32,223 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:32,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:41:32,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:41:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:41:32,229 INFO L87 Difference]: Start difference. First operand 9347 states and 9933 transitions. Second operand has 16 states, 16 states have (on average 117.8125) internal successors, (1885), 15 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:05,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:42:14,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:42:23,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:42:27,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:42:30,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []