./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label30.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_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/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_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label30.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/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_69117783-4045-4ad7-9341-c6c88a6fe823/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 43cd1311a8c4c0246666ef3a4268c4c1917fb33d8d909e5a51c3984959185f09 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:58:19,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:58:19,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:58:19,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:58:19,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:58:19,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:58:19,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:58:19,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:58:19,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:58:19,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:58:19,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:58:19,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:58:19,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:58:19,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:58:19,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:58:19,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:58:19,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:58:19,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:58:19,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:58:19,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:58:19,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:58:19,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:58:19,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:58:19,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:58:19,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:58:19,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:58:19,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:58:19,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:58:19,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:58:19,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:58:19,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:58:19,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:58:19,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:58:19,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:58:19,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:58:19,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:58:19,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:58:19,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:58:19,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:58:19,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:58:19,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:58:19,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:58:19,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:58:19,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:58:19,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:58:19,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:58:19,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:58:19,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:58:19,262 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:58:19,262 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:58:19,262 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:58:19,263 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:58:19,264 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:58:19,264 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:58:19,264 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:58:19,265 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:58:19,265 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:58:19,265 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:58:19,265 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:58:19,266 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:58:19,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:58:19,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:58:19,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:58:19,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:58:19,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:58:19,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:58:19,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:58:19,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:58:19,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:58:19,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:58:19,270 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:58:19,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:58:19,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:58:19,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:58:19,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:58:19,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:58:19,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:58:19,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:58:19,272 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:58:19,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:58:19,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:58:19,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:58:19,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:58:19,273 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_69117783-4045-4ad7-9341-c6c88a6fe823/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43cd1311a8c4c0246666ef3a4268c4c1917fb33d8d909e5a51c3984959185f09 [2021-11-23 16:58:19,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:58:19,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:58:19,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:58:19,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:58:19,727 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:58:19,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem15_label30.c [2021-11-23 16:58:19,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data/4eefcc702/3741b3c1d40a42afb4cea6bd6443a7a9/FLAGc8ce93034 [2021-11-23 16:58:20,623 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:58:20,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/sv-benchmarks/c/eca-rers2012/Problem15_label30.c [2021-11-23 16:58:20,661 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data/4eefcc702/3741b3c1d40a42afb4cea6bd6443a7a9/FLAGc8ce93034 [2021-11-23 16:58:20,728 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data/4eefcc702/3741b3c1d40a42afb4cea6bd6443a7a9 [2021-11-23 16:58:20,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:58:20,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:58:20,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:58:20,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:58:20,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:58:20,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:58:20" (1/1) ... [2021-11-23 16:58:20,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c746f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:20, skipping insertion in model container [2021-11-23 16:58:20,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:58:20" (1/1) ... [2021-11-23 16:58:20,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:58:20,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:58:21,089 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_69117783-4045-4ad7-9341-c6c88a6fe823/sv-benchmarks/c/eca-rers2012/Problem15_label30.c[1915,1928] [2021-11-23 16:58:21,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:58:21,858 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:58:21,895 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_69117783-4045-4ad7-9341-c6c88a6fe823/sv-benchmarks/c/eca-rers2012/Problem15_label30.c[1915,1928] [2021-11-23 16:58:22,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:58:22,219 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:58:22,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22 WrapperNode [2021-11-23 16:58:22,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:58:22,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:58:22,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:58:22,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:58:22,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,518 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-11-23 16:58:22,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:58:22,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:58:22,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:58:22,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:58:22,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:58:22,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:58:22,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:58:22,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:58:22,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:22" (1/1) ... [2021-11-23 16:58:22,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:58:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:22,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:58:22,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:58:23,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:58:23,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:58:23,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:58:23,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:58:23,103 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:58:23,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:58:27,000 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:58:27,069 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:58:27,081 INFO L158 Benchmark]: Toolchain (without parser) took 6341.89ms. Allocated memory was 96.5MB in the beginning and 268.4MB in the end (delta: 172.0MB). Free memory was 69.9MB in the beginning and 182.9MB in the end (delta: -113.0MB). Peak memory consumption was 119.9MB. Max. memory is 16.1GB. [2021-11-23 16:58:27,083 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 79.7MB. Free memory was 59.0MB in the beginning and 58.9MB in the end (delta: 75.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:58:27,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1477.44ms. Allocated memory is still 96.5MB. Free memory was 69.7MB in the beginning and 48.9MB in the end (delta: 20.8MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. [2021-11-23 16:58:27,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 298.85ms. Allocated memory is still 96.5MB. Free memory was 48.9MB in the beginning and 32.5MB in the end (delta: 16.4MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. [2021-11-23 16:58:27,088 INFO L158 Benchmark]: Boogie Preprocessor took 365.10ms. Allocated memory was 96.5MB in the beginning and 157.3MB in the end (delta: 60.8MB). Free memory was 32.5MB in the beginning and 86.5MB in the end (delta: -54.0MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. [2021-11-23 16:58:27,089 INFO L158 Benchmark]: RCFGBuilder took 4190.60ms. Allocated memory was 157.3MB in the beginning and 268.4MB in the end (delta: 111.1MB). Free memory was 86.5MB in the beginning and 182.9MB in the end (delta: -96.4MB). Peak memory consumption was 72.9MB. Max. memory is 16.1GB. [2021-11-23 16:58:27,101 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 79.7MB. Free memory was 59.0MB in the beginning and 58.9MB in the end (delta: 75.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1477.44ms. Allocated memory is still 96.5MB. Free memory was 69.7MB in the beginning and 48.9MB in the end (delta: 20.8MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 298.85ms. Allocated memory is still 96.5MB. Free memory was 48.9MB in the beginning and 32.5MB in the end (delta: 16.4MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 365.10ms. Allocated memory was 96.5MB in the beginning and 157.3MB in the end (delta: 60.8MB). Free memory was 32.5MB in the beginning and 86.5MB in the end (delta: -54.0MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. * RCFGBuilder took 4190.60ms. Allocated memory was 157.3MB in the beginning and 268.4MB in the end (delta: 111.1MB). Free memory was 86.5MB in the beginning and 182.9MB in the end (delta: -96.4MB). Peak memory consumption was 72.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:58:27,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/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_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/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_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label30.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/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_69117783-4045-4ad7-9341-c6c88a6fe823/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 43cd1311a8c4c0246666ef3a4268c4c1917fb33d8d909e5a51c3984959185f09 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:58:29,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:58:30,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:58:30,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:58:30,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:58:30,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:58:30,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:58:30,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:58:30,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:58:30,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:58:30,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:58:30,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:58:30,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:58:30,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:58:30,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:58:30,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:58:30,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:58:30,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:58:30,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:58:30,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:58:30,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:58:30,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:58:30,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:58:30,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:58:30,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:58:30,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:58:30,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:58:30,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:58:30,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:58:30,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:58:30,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:58:30,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:58:30,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:58:30,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:58:30,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:58:30,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:58:30,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:58:30,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:58:30,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:58:30,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:58:30,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:58:30,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:58:30,226 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:58:30,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:58:30,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:58:30,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:58:30,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:58:30,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:58:30,230 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:58:30,230 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:58:30,230 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:58:30,231 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:58:30,232 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:58:30,232 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:58:30,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:58:30,235 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:58:30,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:58:30,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:58:30,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:58:30,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:58:30,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:58:30,236 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:58:30,237 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:58:30,237 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:58:30,237 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:58:30,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:58:30,238 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:58:30,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:58:30,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:58:30,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:58:30,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:58:30,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:58:30,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:58:30,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:58:30,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:58:30,241 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:58:30,241 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:30,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:58:30,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:58:30,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:58:30,252 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_69117783-4045-4ad7-9341-c6c88a6fe823/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43cd1311a8c4c0246666ef3a4268c4c1917fb33d8d909e5a51c3984959185f09 [2021-11-23 16:58:30,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:58:30,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:58:30,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:58:30,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:58:30,774 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:58:30,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem15_label30.c [2021-11-23 16:58:30,877 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data/091234c42/725cf5af816d4738b7381612527b64b1/FLAG4eefa520b [2021-11-23 16:58:31,961 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:58:31,962 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/sv-benchmarks/c/eca-rers2012/Problem15_label30.c [2021-11-23 16:58:32,007 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data/091234c42/725cf5af816d4738b7381612527b64b1/FLAG4eefa520b [2021-11-23 16:58:32,466 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/data/091234c42/725cf5af816d4738b7381612527b64b1 [2021-11-23 16:58:32,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:58:32,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:58:32,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:58:32,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:58:32,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:58:32,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:58:32" (1/1) ... [2021-11-23 16:58:32,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b04d15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:32, skipping insertion in model container [2021-11-23 16:58:32,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:58:32" (1/1) ... [2021-11-23 16:58:32,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:58:32,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:58:32,788 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_69117783-4045-4ad7-9341-c6c88a6fe823/sv-benchmarks/c/eca-rers2012/Problem15_label30.c[1915,1928] [2021-11-23 16:58:33,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:58:33,535 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:58:33,569 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_69117783-4045-4ad7-9341-c6c88a6fe823/sv-benchmarks/c/eca-rers2012/Problem15_label30.c[1915,1928] [2021-11-23 16:58:34,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:58:34,051 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:58:34,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34 WrapperNode [2021-11-23 16:58:34,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:58:34,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:58:34,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:58:34,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:58:34,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,317 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1755 [2021-11-23 16:58:34,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:58:34,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:58:34,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:58:34,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:58:34,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:58:34,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:58:34,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:58:34,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:58:34,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (1/1) ... [2021-11-23 16:58:34,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:58:34,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:34,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:58:34,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:58:34,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:58:34,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:58:34,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:58:34,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:58:34,729 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:58:34,731 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:58:56,088 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:58:56,106 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:58:56,107 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:58:56,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:58:56 BoogieIcfgContainer [2021-11-23 16:58:56,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:58:56,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:58:56,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:58:56,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:58:56,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:58:32" (1/3) ... [2021-11-23 16:58:56,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2c9dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:58:56, skipping insertion in model container [2021-11-23 16:58:56,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:34" (2/3) ... [2021-11-23 16:58:56,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2c9dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:58:56, skipping insertion in model container [2021-11-23 16:58:56,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:58:56" (3/3) ... [2021-11-23 16:58:56,120 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label30.c [2021-11-23 16:58:56,127 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:58:56,127 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:58:56,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:58:56,195 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:58:56,196 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:58:56,235 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 16:58:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:58:56,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:56,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:58:56,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:58:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:56,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1414013846, now seen corresponding path program 1 times [2021-11-23 16:58:56,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:56,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387800084] [2021-11-23 16:58:56,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:56,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:56,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:56,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:58:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:56,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:58:56,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:56,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:58:56,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387800084] [2021-11-23 16:58:56,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387800084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:58:56,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:58:56,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:58:56,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993407718] [2021-11-23 16:58:56,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:58:56,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:58:56,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:58:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:58:56,574 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:22,938 INFO L93 Difference]: Finished difference Result 1153 states and 2105 transitions. [2021-11-23 16:59:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-23 16:59:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:22,965 INFO L225 Difference]: With dead ends: 1153 [2021-11-23 16:59:22,965 INFO L226 Difference]: Without dead ends: 664 [2021-11-23 16:59:22,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:22,977 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 306 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 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, 26.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:22,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 26.2s Time] [2021-11-23 16:59:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-23 16:59:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 662. [2021-11-23 16:59:23,079 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 16:59:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 980 transitions. [2021-11-23 16:59:23,086 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 980 transitions. Word has length 14 [2021-11-23 16:59:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:23,087 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 980 transitions. [2021-11-23 16:59:23,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 980 transitions. [2021-11-23 16:59:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:59:23,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:23,093 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:59:23,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:23,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:23,307 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:23,308 INFO L85 PathProgramCache]: Analyzing trace with hash -981945563, now seen corresponding path program 1 times [2021-11-23 16:59:23,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:23,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624671270] [2021-11-23 16:59:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:23,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:23,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:23,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:59:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:23,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:59:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:23,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:23,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:23,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624671270] [2021-11-23 16:59:23,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624671270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:23,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:23,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:59:23,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109050525] [2021-11-23 16:59:23,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:23,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:59:23,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:23,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:59:23,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:23,946 INFO L87 Difference]: Start difference. First operand 662 states and 980 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:50,214 INFO L93 Difference]: Finished difference Result 1927 states and 2854 transitions. [2021-11-23 16:59:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:50,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 16:59:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:50,225 INFO L225 Difference]: With dead ends: 1927 [2021-11-23 16:59:50,225 INFO L226 Difference]: Without dead ends: 1267 [2021-11-23 16:59:50,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:50,228 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 261 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s 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, 26.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:50,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 318 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 26.2s Time] [2021-11-23 16:59:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-11-23 16:59:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2021-11-23 16:59:50,276 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 16:59:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1649 transitions. [2021-11-23 16:59:50,282 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1649 transitions. Word has length 79 [2021-11-23 16:59:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:50,283 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1649 transitions. [2021-11-23 16:59:50,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1649 transitions. [2021-11-23 16:59:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 16:59:50,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:50,295 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:59:50,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:50,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:50,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:50,507 INFO L85 PathProgramCache]: Analyzing trace with hash -274508967, now seen corresponding path program 1 times [2021-11-23 16:59:50,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:50,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520352530] [2021-11-23 16:59:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:50,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:50,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:50,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:50,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:59:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:50,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:59:50,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 65 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:54,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 65 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:57,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:57,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520352530] [2021-11-23 16:59:57,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520352530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:57,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [698475916] [2021-11-23 16:59:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:57,238 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:59:57,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:59:57,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 16:59:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:57,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:59:57,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:00:00,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:00,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [698475916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:00,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:00:00,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2021-11-23 17:00:00,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634638469] [2021-11-23 17:00:00,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:00,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:00:00,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:00,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:00:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:00:00,040 INFO L87 Difference]: Start difference. First operand 1265 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:15,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:00:18,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:00:36,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:00:39,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:00:51,341 WARN L534 Checker$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 17:00:53,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:00:54,635 WARN L534 Checker$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 17:00:56,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:00:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:58,138 INFO L93 Difference]: Finished difference Result 2633 states and 3623 transitions. [2021-11-23 17:00:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:00:58,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-11-23 17:00:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:58,172 INFO L225 Difference]: With dead ends: 2633 [2021-11-23 17:00:58,172 INFO L226 Difference]: Without dead ends: 1970 [2021-11-23 17:00:58,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 528 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 17:00:58,176 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1328 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 715 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:58,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1328 Valid, 118 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 1538 Invalid, 1 Unknown, 0 Unchecked, 58.0s Time] [2021-11-23 17:00:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-11-23 17:00:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1870. [2021-11-23 17:00:58,244 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 17:00:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2475 transitions. [2021-11-23 17:00:58,250 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2475 transitions. Word has length 180 [2021-11-23 17:00:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:58,251 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2475 transitions. [2021-11-23 17:00:58,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2475 transitions. [2021-11-23 17:00:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-23 17:00:58,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:58,259 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:58,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:58,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 17:00:58,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:58,670 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:58,672 INFO L85 PathProgramCache]: Analyzing trace with hash -808790641, now seen corresponding path program 1 times [2021-11-23 17:00:58,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:58,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123885133] [2021-11-23 17:00:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:58,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:58,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:58,674 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:58,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:00:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:00:58,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 69 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:01,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 69 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:04,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:04,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123885133] [2021-11-23 17:01:04,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123885133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [321153561] [2021-11-23 17:01:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:04,108 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:04,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:01:04,115 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:01:04,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:01:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:04,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:04,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:04,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [321153561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:04,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:01:04,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:01:04,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599470006] [2021-11-23 17:01:04,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:04,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:04,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:01:04,731 INFO L87 Difference]: Start difference. First operand 1870 states and 2475 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 17:01:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:27,666 INFO L93 Difference]: Finished difference Result 3736 states and 5168 transitions. [2021-11-23 17:01:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 184 [2021-11-23 17:01:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:27,690 INFO L225 Difference]: With dead ends: 3736 [2021-11-23 17:01:27,691 INFO L226 Difference]: Without dead ends: 2468 [2021-11-23 17:01:27,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 544 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 17:01:27,695 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 269 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s 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, 22.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:27,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 333 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 22.9s Time] [2021-11-23 17:01:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-11-23 17:01:27,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 2468. [2021-11-23 17:01:27,782 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 17:01:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3140 transitions. [2021-11-23 17:01:27,789 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3140 transitions. Word has length 184 [2021-11-23 17:01:27,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:27,790 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3140 transitions. [2021-11-23 17:01:27,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 17:01:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3140 transitions. [2021-11-23 17:01:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-23 17:01:27,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:27,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:01:27,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:28,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:28,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:28,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:28,215 INFO L85 PathProgramCache]: Analyzing trace with hash 727708070, now seen corresponding path program 1 times [2021-11-23 17:01:28,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:28,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752794643] [2021-11-23 17:01:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:28,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:28,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:28,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:28,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:01:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:01:28,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 81 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:31,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 81 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:33,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752794643] [2021-11-23 17:01:33,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752794643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18768478] [2021-11-23 17:01:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:33,779 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:33,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:01:33,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:01:33,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:01:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:34,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:01:34,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 68 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 17:01:36,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 17:01:37,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [18768478] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:01:37,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:01:37,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 7] total 12 [2021-11-23 17:01:37,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672784499] [2021-11-23 17:01:37,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:37,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:37,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:37,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:37,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:01:37,246 INFO L87 Difference]: Start difference. First operand 2468 states and 3140 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:47,431 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 17:01:56,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:08,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:10,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:22,731 WARN L534 Checker$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 17:02:26,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:29,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:29,077 INFO L93 Difference]: Finished difference Result 3976 states and 5171 transitions. [2021-11-23 17:02:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:29,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 301 [2021-11-23 17:02:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:29,123 INFO L225 Difference]: With dead ends: 3976 [2021-11-23 17:02:29,124 INFO L226 Difference]: Without dead ends: 3974 [2021-11-23 17:02:29,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1200 GetRequests, 1190 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:02:29,127 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 379 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 357 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:29,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 83 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 937 Invalid, 1 Unknown, 0 Unchecked, 51.8s Time] [2021-11-23 17:02:29,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-11-23 17:02:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 2775. [2021-11-23 17:02:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 1.3871665465032443) internal successors, (3848), 2774 states have internal predecessors, (3848), 0 states have call successors, (0), 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 17:02:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 3848 transitions. [2021-11-23 17:02:29,226 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 3848 transitions. Word has length 301 [2021-11-23 17:02:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:29,228 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 3848 transitions. [2021-11-23 17:02:29,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 3848 transitions. [2021-11-23 17:02:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-23 17:02:29,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:29,237 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-23 17:02:29,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:29,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:29,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:29,651 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:29,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1685606769, now seen corresponding path program 1 times [2021-11-23 17:02:29,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:29,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647758789] [2021-11-23 17:02:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:29,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:29,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:29,658 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:29,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:02:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 17:02:32,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:32,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647758789] [2021-11-23 17:02:32,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647758789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:32,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:32,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:02:32,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169758560] [2021-11-23 17:02:32,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:32,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:32,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:32,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:02:32,316 INFO L87 Difference]: Start difference. First operand 2775 states and 3848 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 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 17:02:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:52,257 INFO L93 Difference]: Finished difference Result 5847 states and 8005 transitions. [2021-11-23 17:02:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 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 355 [2021-11-23 17:02:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:52,299 INFO L225 Difference]: With dead ends: 5847 [2021-11-23 17:02:52,299 INFO L226 Difference]: Without dead ends: 3074 [2021-11-23 17:02:52,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 353 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 17:02:52,305 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s 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, 19.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:52,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 358 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 19.9s Time] [2021-11-23 17:02:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-11-23 17:02:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 3074. [2021-11-23 17:02:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 3073 states have (on average 1.3514480963228115) internal successors, (4153), 3073 states have internal predecessors, (4153), 0 states have call successors, (0), 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 17:02:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 4153 transitions. [2021-11-23 17:02:52,388 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 4153 transitions. Word has length 355 [2021-11-23 17:02:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:52,389 INFO L470 AbstractCegarLoop]: Abstraction has 3074 states and 4153 transitions. [2021-11-23 17:02:52,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 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 17:02:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 4153 transitions. [2021-11-23 17:02:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-11-23 17:02:52,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:52,402 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:52,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:52,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:52,621 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash -946566433, now seen corresponding path program 1 times [2021-11-23 17:02:52,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:52,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286317021] [2021-11-23 17:02:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:52,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:52,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:52,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:52,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:02:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:02:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:02:53,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:53,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:53,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286317021] [2021-11-23 17:02:53,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286317021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:53,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:53,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:02:53,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715625126] [2021-11-23 17:02:53,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:53,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:53,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:53,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:53,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:02:53,964 INFO L87 Difference]: Start difference. First operand 3074 states and 4153 transitions. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 17:03:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:22,948 INFO L93 Difference]: Finished difference Result 7346 states and 10206 transitions. [2021-11-23 17:03:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:22,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 429 [2021-11-23 17:03:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:23,002 INFO L225 Difference]: With dead ends: 7346 [2021-11-23 17:03:23,003 INFO L226 Difference]: Without dead ends: 4573 [2021-11-23 17:03:23,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 427 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 17:03:23,009 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 242 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 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, 28.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:23,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 662 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 28.9s Time] [2021-11-23 17:03:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4573 states. [2021-11-23 17:03:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4573 to 3972. [2021-11-23 17:03:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3971 states have (on average 1.304457315537648) internal successors, (5180), 3971 states have internal predecessors, (5180), 0 states have call successors, (0), 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 17:03:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 5180 transitions. [2021-11-23 17:03:23,142 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 5180 transitions. Word has length 429 [2021-11-23 17:03:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:23,143 INFO L470 AbstractCegarLoop]: Abstraction has 3972 states and 5180 transitions. [2021-11-23 17:03:23,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 17:03:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 5180 transitions. [2021-11-23 17:03:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-11-23 17:03:23,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:23,158 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-23 17:03:23,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:23,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:23,382 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:23,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1298135461, now seen corresponding path program 1 times [2021-11-23 17:03:23,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:23,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502159982] [2021-11-23 17:03:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:23,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:23,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:23,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:23,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:03:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:03:23,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 288 proven. 32 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 17:03:26,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 288 proven. 32 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 17:03:29,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:29,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502159982] [2021-11-23 17:03:29,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502159982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:29,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [575104706] [2021-11-23 17:03:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:29,301 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:29,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:29,313 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:29,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:03:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:29,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-23 17:03:30,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:30,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [575104706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:30,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:03:30,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:03:30,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035341554] [2021-11-23 17:03:30,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:30,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:30,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:30,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:30,459 INFO L87 Difference]: Start difference. First operand 3972 states and 5180 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 17:03:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:58,066 INFO L93 Difference]: Finished difference Result 9140 states and 12254 transitions. [2021-11-23 17:03:58,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:58,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 446 [2021-11-23 17:03:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:58,103 INFO L225 Difference]: With dead ends: 9140 [2021-11-23 17:03:58,104 INFO L226 Difference]: Without dead ends: 5469 [2021-11-23 17:03:58,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1335 GetRequests, 1330 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:58,111 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 258 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:58,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 630 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 27.5s Time] [2021-11-23 17:03:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2021-11-23 17:03:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 4871. [2021-11-23 17:03:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4871 states, 4870 states have (on average 1.2679671457905544) internal successors, (6175), 4870 states have internal predecessors, (6175), 0 states have call successors, (0), 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 17:03:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4871 states to 4871 states and 6175 transitions. [2021-11-23 17:03:58,265 INFO L78 Accepts]: Start accepts. Automaton has 4871 states and 6175 transitions. Word has length 446 [2021-11-23 17:03:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:58,266 INFO L470 AbstractCegarLoop]: Abstraction has 4871 states and 6175 transitions. [2021-11-23 17:03:58,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 17:03:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4871 states and 6175 transitions. [2021-11-23 17:03:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-11-23 17:03:58,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:58,277 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-23 17:03:58,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:58,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-23 17:03:58,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:58,698 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1770925914, now seen corresponding path program 1 times [2021-11-23 17:03:58,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:58,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95285468] [2021-11-23 17:03:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:58,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:58,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:58,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:58,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:03:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:59,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:03:59,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 293 proven. 32 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-23 17:04:01,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 293 proven. 32 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-23 17:04:04,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:04,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95285468] [2021-11-23 17:04:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95285468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:04,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1890694243] [2021-11-23 17:04:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:04,223 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:04,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:04,224 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:04,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:04:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:05,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:04:05,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 250 proven. 217 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:04:08,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 250 proven. 217 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:04:11,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1890694243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:11,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508692028] [2021-11-23 17:04:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:11,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:04:11,389 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:04:11,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69117783-4045-4ad7-9341-c6c88a6fe823/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:04:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:04:11,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 480 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:04:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 389 proven. 24 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 17:04:15,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508692028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:15,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:04:15,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4, 4, 5, 6] total 18 [2021-11-23 17:04:15,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741809058] [2021-11-23 17:04:15,976 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:04:15,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 17:04:15,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 17:04:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:04:15,983 INFO L87 Difference]: Start difference. First operand 4871 states and 6175 transitions. Second operand has 18 states, 18 states have (on average 83.11111111111111) internal successors, (1496), 18 states have internal predecessors, (1496), 0 states have call successors, (0), 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 17:04:28,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:30,948 WARN L534 Checker$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 17:04:59,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:08,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:21,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:25,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:10,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:11,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:48,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:57,714 WARN L534 Checker$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 17:07:09,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:19,326 WARN L534 Checker$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 17:07:28,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:38,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:43,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:57,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:58,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:33,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:45,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:55,396 WARN L534 Checker$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 17:09:01,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:08,657 WARN L534 Checker$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 17:09:20,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:24,234 WARN L534 Checker$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 17:09:31,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:13,813 WARN L534 Checker$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 17:10:20,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:23,716 WARN L534 Checker$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 17:10:26,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:39,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:52,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:55,133 WARN L534 Checker$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 17:10:59,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:02,311 WARN L534 Checker$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 17:11:41,458 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 []