./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 16:59:01,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 16:59:01,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 16:59:01,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 16:59:01,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 16:59:01,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 16:59:01,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 16:59:01,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 16:59:01,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 16:59:01,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 16:59:01,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 16:59:01,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 16:59:01,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 16:59:01,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 16:59:01,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 16:59:01,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 16:59:01,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 16:59:01,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 16:59:01,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 16:59:01,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 16:59:01,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 16:59:01,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 16:59:01,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 16:59:01,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 16:59:01,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 16:59:01,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 16:59:01,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 16:59:01,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 16:59:01,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 16:59:01,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 16:59:01,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 16:59:01,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 16:59:01,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 16:59:01,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 16:59:01,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 16:59:01,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 16:59:01,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 16:59:01,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 16:59:01,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 16:59:01,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 16:59:01,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 16:59:01,221 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 16:59:01,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 16:59:01,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 16:59:01,244 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 16:59:01,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 16:59:01,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 16:59:01,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 16:59:01,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 16:59:01,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 16:59:01,246 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 16:59:01,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 16:59:01,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 16:59:01,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 16:59:01,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 16:59:01,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 16:59:01,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 16:59:01,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 16:59:01,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 16:59:01,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 16:59:01,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 16:59:01,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 16:59:01,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 16:59:01,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 16:59:01,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 16:59:01,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 16:59:01,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:59:01,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 16:59:01,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 16:59:01,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 16:59:01,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 16:59:01,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 16:59:01,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 16:59:01,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 16:59:01,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 16:59:01,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 16:59:01,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2021-12-06 16:59:01,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 16:59:01,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 16:59:01,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 16:59:01,463 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 16:59:01,463 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 16:59:01,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2021-12-06 16:59:01,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data/e553ea2f7/3d10d49207484e219ee4ab0cb5a954cb/FLAG9f057a9be [2021-12-06 16:59:01,904 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 16:59:01,905 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2021-12-06 16:59:01,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data/e553ea2f7/3d10d49207484e219ee4ab0cb5a954cb/FLAG9f057a9be [2021-12-06 16:59:01,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data/e553ea2f7/3d10d49207484e219ee4ab0cb5a954cb [2021-12-06 16:59:01,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 16:59:01,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 16:59:01,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 16:59:01,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 16:59:01,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 16:59:01,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:59:01" (1/1) ... [2021-12-06 16:59:01,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5b6389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:01, skipping insertion in model container [2021-12-06 16:59:01,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:59:01" (1/1) ... [2021-12-06 16:59:01,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 16:59:01,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 16:59:02,089 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_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2021-12-06 16:59:02,093 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_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2021-12-06 16:59:02,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:59:02,124 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 16:59:02,135 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_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2021-12-06 16:59:02,136 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_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2021-12-06 16:59:02,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:59:02,165 INFO L208 MainTranslator]: Completed translation [2021-12-06 16:59:02,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02 WrapperNode [2021-12-06 16:59:02,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 16:59:02,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 16:59:02,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 16:59:02,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 16:59:02,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,193 INFO L137 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2021-12-06 16:59:02,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 16:59:02,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 16:59:02,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 16:59:02,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 16:59:02,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 16:59:02,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 16:59:02,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 16:59:02,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 16:59:02,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (1/1) ... [2021-12-06 16:59:02,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:59:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:02,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 16:59:02,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 16:59:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 16:59:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 16:59:02,284 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 16:59:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-12-06 16:59:02,284 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-12-06 16:59:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 16:59:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 16:59:02,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 16:59:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 16:59:02,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 16:59:02,347 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 16:59:02,348 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 16:59:02,494 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 16:59:02,500 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 16:59:02,500 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 16:59:02,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:59:02 BoogieIcfgContainer [2021-12-06 16:59:02,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 16:59:02,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 16:59:02,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 16:59:02,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 16:59:02,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 04:59:01" (1/3) ... [2021-12-06 16:59:02,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68746fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:59:02, skipping insertion in model container [2021-12-06 16:59:02,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:02" (2/3) ... [2021-12-06 16:59:02,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68746fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:59:02, skipping insertion in model container [2021-12-06 16:59:02,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:59:02" (3/3) ... [2021-12-06 16:59:02,508 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2021-12-06 16:59:02,512 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 16:59:02,512 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 16:59:02,551 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 16:59:02,557 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=PETRI_NET, 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 [2021-12-06 16:59:02,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 16:59:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 16:59:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 16:59:02,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:02,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:02,576 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:02,581 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 16:59:02,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:02,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870495168] [2021-12-06 16:59:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:02,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:02,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:02,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870495168] [2021-12-06 16:59:02,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870495168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:59:02,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:59:02,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 16:59:02,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721525472] [2021-12-06 16:59:02,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:59:02,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 16:59:02,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:02,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 16:59:02,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 16:59:02,747 INFO L87 Difference]: Start difference. First operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:02,774 INFO L93 Difference]: Finished difference Result 121 states and 178 transitions. [2021-12-06 16:59:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 16:59:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-06 16:59:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:02,784 INFO L225 Difference]: With dead ends: 121 [2021-12-06 16:59:02,784 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 16:59:02,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 16:59:02,790 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:02,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:59:02,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 16:59:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-06 16:59:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 16:59:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2021-12-06 16:59:02,821 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 7 [2021-12-06 16:59:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:02,821 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2021-12-06 16:59:02,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2021-12-06 16:59:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 16:59:02,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:02,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:02,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 16:59:02,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 16:59:02,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:02,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701290928] [2021-12-06 16:59:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:02,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 16:59:02,847 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 16:59:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 16:59:02,872 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 16:59:02,872 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 16:59:02,873 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 16:59:02,875 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 16:59:02,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 16:59:02,878 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-06 16:59:02,881 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 16:59:02,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 04:59:02 BoogieIcfgContainer [2021-12-06 16:59:02,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 16:59:02,898 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 16:59:02,898 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 16:59:02,898 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 16:59:02,899 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:59:02" (3/4) ... [2021-12-06 16:59:02,901 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 16:59:02,901 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 16:59:02,902 INFO L158 Benchmark]: Toolchain (without parser) took 976.37ms. Allocated memory is still 113.2MB. Free memory was 76.0MB in the beginning and 86.9MB in the end (delta: -10.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 16:59:02,902 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 113.2MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 16:59:02,902 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.60ms. Allocated memory is still 113.2MB. Free memory was 75.9MB in the beginning and 84.9MB in the end (delta: -9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 16:59:02,903 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.14ms. Allocated memory is still 113.2MB. Free memory was 84.9MB in the beginning and 82.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 16:59:02,904 INFO L158 Benchmark]: Boogie Preprocessor took 20.78ms. Allocated memory is still 113.2MB. Free memory was 82.8MB in the beginning and 81.8MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 16:59:02,904 INFO L158 Benchmark]: RCFGBuilder took 286.72ms. Allocated memory is still 113.2MB. Free memory was 81.4MB in the beginning and 68.6MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 16:59:02,904 INFO L158 Benchmark]: TraceAbstraction took 394.41ms. Allocated memory is still 113.2MB. Free memory was 68.2MB in the beginning and 86.9MB in the end (delta: -18.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 16:59:02,905 INFO L158 Benchmark]: Witness Printer took 2.78ms. Allocated memory is still 113.2MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 16:59:02,908 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 113.2MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.60ms. Allocated memory is still 113.2MB. Free memory was 75.9MB in the beginning and 84.9MB in the end (delta: -9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.14ms. Allocated memory is still 113.2MB. Free memory was 84.9MB in the beginning and 82.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.78ms. Allocated memory is still 113.2MB. Free memory was 82.8MB in the beginning and 81.8MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 286.72ms. Allocated memory is still 113.2MB. Free memory was 81.4MB in the beginning and 68.6MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 394.41ms. Allocated memory is still 113.2MB. Free memory was 68.2MB in the beginning and 86.9MB in the end (delta: -18.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.78ms. Allocated memory is still 113.2MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 63 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 81 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 81 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-06 16:59:02,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/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_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 16:59:04,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 16:59:04,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 16:59:04,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 16:59:04,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 16:59:04,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 16:59:04,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 16:59:04,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 16:59:04,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 16:59:04,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 16:59:04,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 16:59:04,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 16:59:04,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 16:59:04,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 16:59:04,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 16:59:04,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 16:59:04,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 16:59:04,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 16:59:04,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 16:59:04,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 16:59:04,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 16:59:04,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 16:59:04,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 16:59:04,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 16:59:04,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 16:59:04,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 16:59:04,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 16:59:04,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 16:59:04,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 16:59:04,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 16:59:04,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 16:59:04,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 16:59:04,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 16:59:04,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 16:59:04,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 16:59:04,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 16:59:04,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 16:59:04,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 16:59:04,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 16:59:04,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 16:59:04,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 16:59:04,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 16:59:04,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 16:59:04,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 16:59:04,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 16:59:04,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 16:59:04,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 16:59:04,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 16:59:04,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 16:59:04,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 16:59:04,718 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 16:59:04,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 16:59:04,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 16:59:04,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 16:59:04,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 16:59:04,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 16:59:04,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 16:59:04,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 16:59:04,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 16:59:04,720 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 16:59:04,720 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 16:59:04,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 16:59:04,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 16:59:04,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 16:59:04,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 16:59:04,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 16:59:04,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 16:59:04,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 16:59:04,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:59:04,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 16:59:04,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 16:59:04,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 16:59:04,722 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 16:59:04,722 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 16:59:04,722 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 16:59:04,722 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 16:59:04,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 16:59:04,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 16:59:04,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 16:59:04,723 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_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2021-12-06 16:59:04,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 16:59:04,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 16:59:04,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 16:59:04,981 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 16:59:04,982 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 16:59:04,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2021-12-06 16:59:05,031 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data/081871b2a/986905cefe8744418ea4c90374ab1871/FLAG16fc95be0 [2021-12-06 16:59:05,480 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 16:59:05,480 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2021-12-06 16:59:05,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data/081871b2a/986905cefe8744418ea4c90374ab1871/FLAG16fc95be0 [2021-12-06 16:59:05,500 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/data/081871b2a/986905cefe8744418ea4c90374ab1871 [2021-12-06 16:59:05,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 16:59:05,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 16:59:05,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 16:59:05,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 16:59:05,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 16:59:05,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f8a88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05, skipping insertion in model container [2021-12-06 16:59:05,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 16:59:05,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 16:59:05,669 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_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2021-12-06 16:59:05,674 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_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2021-12-06 16:59:05,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:59:05,724 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 16:59:05,734 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_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2021-12-06 16:59:05,736 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_ece1104a-fcd4-424e-85f4-a09e916376ab/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2021-12-06 16:59:05,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:59:05,764 INFO L208 MainTranslator]: Completed translation [2021-12-06 16:59:05,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05 WrapperNode [2021-12-06 16:59:05,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 16:59:05,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 16:59:05,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 16:59:05,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 16:59:05,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,795 INFO L137 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 70 [2021-12-06 16:59:05,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 16:59:05,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 16:59:05,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 16:59:05,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 16:59:05,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 16:59:05,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 16:59:05,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 16:59:05,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 16:59:05,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (1/1) ... [2021-12-06 16:59:05,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:59:05,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:05,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 16:59:05,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 16:59:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 16:59:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 16:59:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 16:59:05,875 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 16:59:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-12-06 16:59:05,876 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-12-06 16:59:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 16:59:05,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 16:59:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 16:59:05,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 16:59:05,932 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 16:59:05,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 16:59:08,274 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 16:59:08,280 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 16:59:08,280 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 16:59:08,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:59:08 BoogieIcfgContainer [2021-12-06 16:59:08,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 16:59:08,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 16:59:08,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 16:59:08,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 16:59:08,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 04:59:05" (1/3) ... [2021-12-06 16:59:08,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6074f474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:59:08, skipping insertion in model container [2021-12-06 16:59:08,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:59:05" (2/3) ... [2021-12-06 16:59:08,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6074f474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:59:08, skipping insertion in model container [2021-12-06 16:59:08,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:59:08" (3/3) ... [2021-12-06 16:59:08,289 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2021-12-06 16:59:08,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 16:59:08,297 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 16:59:08,330 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 16:59:08,335 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=PETRI_NET, 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 [2021-12-06 16:59:08,336 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 16:59:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 16:59:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 16:59:08,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:08,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:08,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:08,354 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 16:59:08,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 16:59:08,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703006517] [2021-12-06 16:59:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:08,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 16:59:08,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 16:59:08,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 16:59:08,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 16:59:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:08,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 16:59:08,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:08,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 16:59:08,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 16:59:08,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703006517] [2021-12-06 16:59:08,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703006517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:59:08,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:59:08,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 16:59:08,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216288488] [2021-12-06 16:59:08,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:59:08,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 16:59:08,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 16:59:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 16:59:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 16:59:08,860 INFO L87 Difference]: Start difference. First operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:08,880 INFO L93 Difference]: Finished difference Result 121 states and 178 transitions. [2021-12-06 16:59:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 16:59:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-06 16:59:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:08,887 INFO L225 Difference]: With dead ends: 121 [2021-12-06 16:59:08,887 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 16:59:08,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 16:59:08,892 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:08,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:59:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 16:59:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-06 16:59:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 16:59:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2021-12-06 16:59:08,921 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 7 [2021-12-06 16:59:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:08,921 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2021-12-06 16:59:08,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:08,921 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2021-12-06 16:59:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 16:59:08,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:08,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:08,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 16:59:09,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 16:59:09,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 16:59:09,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 16:59:09,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602225114] [2021-12-06 16:59:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:09,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 16:59:09,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 16:59:09,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 16:59:09,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 16:59:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:22,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 16:59:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:36,802 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-12-06 17:00:27,011 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-12-06 17:00:29,058 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-12-06 17:00:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:00:29,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:00:29,059 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:29,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602225114] [2021-12-06 17:00:29,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602225114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:00:29,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:00:29,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:00:29,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864492020] [2021-12-06 17:00:29,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:00:29,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:00:29,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:00:29,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-12-06 17:00:29,062 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:00:31,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 17:00:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:31,629 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-12-06 17:00:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:00:31,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-06 17:00:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:31,632 INFO L225 Difference]: With dead ends: 56 [2021-12-06 17:00:31,632 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 17:00:31,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2021-12-06 17:00:31,634 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 68 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:31,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 172 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 1 Unknown, 141 Unchecked, 2.4s Time] [2021-12-06 17:00:31,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 17:00:31,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-06 17:00:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.358974358974359) internal successors, (53), 40 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 17:00:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-12-06 17:00:31,642 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 7 [2021-12-06 17:00:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:31,642 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-12-06 17:00:31,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:00:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-12-06 17:00:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:00:31,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:31,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:31,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 17:00:31,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:31,845 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1078958274, now seen corresponding path program 1 times [2021-12-06 17:00:31,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:31,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140682024] [2021-12-06 17:00:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:31,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:31,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:31,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:31,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 17:00:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:00:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:00:32,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:00:32,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:32,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140682024] [2021-12-06 17:00:32,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140682024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:00:32,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:00:32,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:00:32,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753951384] [2021-12-06 17:00:32,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:00:32,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:00:32,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:32,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:00:32,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:00:32,187 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:00:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:32,457 INFO L93 Difference]: Finished difference Result 100 states and 135 transitions. [2021-12-06 17:00:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:00:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-12-06 17:00:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:32,461 INFO L225 Difference]: With dead ends: 100 [2021-12-06 17:00:32,461 INFO L226 Difference]: Without dead ends: 72 [2021-12-06 17:00:32,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:00:32,463 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:32,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 438 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:00:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-06 17:00:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2021-12-06 17:00:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-06 17:00:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2021-12-06 17:00:32,479 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 32 [2021-12-06 17:00:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:32,480 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2021-12-06 17:00:32,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:00:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2021-12-06 17:00:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:00:32,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:32,483 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:32,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 17:00:32,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:32,684 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash 452521591, now seen corresponding path program 1 times [2021-12-06 17:00:32,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:32,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059585128] [2021-12-06 17:00:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:32,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:32,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:32,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:32,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 17:00:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:32,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:00:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:00:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:00:33,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:33,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059585128] [2021-12-06 17:00:33,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059585128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:33,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:00:33,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-12-06 17:00:33,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482736288] [2021-12-06 17:00:33,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:33,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:00:33,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:00:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:00:33,268 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:00:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:33,704 INFO L93 Difference]: Finished difference Result 122 states and 160 transitions. [2021-12-06 17:00:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:00:33,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-06 17:00:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:33,707 INFO L225 Difference]: With dead ends: 122 [2021-12-06 17:00:33,707 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 17:00:33,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:00:33,708 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 26 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:33,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 508 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:00:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 17:00:33,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-12-06 17:00:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 56 states have internal predecessors, (69), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-06 17:00:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2021-12-06 17:00:33,720 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 36 [2021-12-06 17:00:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:33,721 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2021-12-06 17:00:33,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:00:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2021-12-06 17:00:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:00:33,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:33,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 17:00:33,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 17:00:33,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:33,925 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:33,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1328087799, now seen corresponding path program 1 times [2021-12-06 17:00:33,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:33,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543662106] [2021-12-06 17:00:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:33,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:33,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:33,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:33,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 17:00:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:00:33,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:00:34,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:00:34,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:34,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543662106] [2021-12-06 17:00:34,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543662106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:34,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:00:34,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-06 17:00:34,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95259396] [2021-12-06 17:00:34,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:34,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:00:34,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:00:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:00:34,506 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:00:34,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:34,747 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2021-12-06 17:00:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:00:34,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-12-06 17:00:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:34,750 INFO L225 Difference]: With dead ends: 114 [2021-12-06 17:00:34,750 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 17:00:34,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:00:34,751 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:34,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 476 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:00:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 17:00:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2021-12-06 17:00:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-12-06 17:00:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-12-06 17:00:34,762 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 40 [2021-12-06 17:00:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:34,762 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-12-06 17:00:34,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:00:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-12-06 17:00:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:00:34,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:34,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:34,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-06 17:00:34,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:34,969 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:34,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:34,971 INFO L85 PathProgramCache]: Analyzing trace with hash 78255138, now seen corresponding path program 2 times [2021-12-06 17:00:34,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:34,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303413270] [2021-12-06 17:00:34,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:00:34,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:34,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:34,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:34,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 17:00:35,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 17:00:35,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:00:35,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:00:35,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 17:00:35,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:00:35,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303413270] [2021-12-06 17:00:35,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303413270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:00:35,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:00:35,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:00:35,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877375920] [2021-12-06 17:00:35,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:00:35,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:00:35,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:00:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:00:35,382 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:00:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:35,581 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2021-12-06 17:00:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:00:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-12-06 17:00:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:35,584 INFO L225 Difference]: With dead ends: 97 [2021-12-06 17:00:35,584 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 17:00:35,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:00:35,585 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 9 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:35,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 339 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2021-12-06 17:00:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 17:00:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2021-12-06 17:00:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 68 states have internal predecessors, (81), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2021-12-06 17:00:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2021-12-06 17:00:35,597 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 40 [2021-12-06 17:00:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:35,597 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2021-12-06 17:00:35,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:00:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2021-12-06 17:00:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:00:35,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:35,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:35,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-06 17:00:35,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:35,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash 135513440, now seen corresponding path program 1 times [2021-12-06 17:00:35,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:35,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488387821] [2021-12-06 17:00:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:35,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:35,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:35,808 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:35,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 17:00:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:35,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:00:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 17:00:36,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:00:36,184 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:36,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488387821] [2021-12-06 17:00:36,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488387821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:00:36,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:00:36,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:00:36,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346417648] [2021-12-06 17:00:36,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:00:36,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:00:36,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:36,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:00:36,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:00:36,185 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:00:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:36,352 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2021-12-06 17:00:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:00:36,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-12-06 17:00:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:36,354 INFO L225 Difference]: With dead ends: 97 [2021-12-06 17:00:36,354 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 17:00:36,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:00:36,356 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:36,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 312 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-12-06 17:00:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 17:00:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2021-12-06 17:00:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.234375) internal successors, (79), 66 states have internal predecessors, (79), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-12-06 17:00:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-12-06 17:00:36,370 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 40 [2021-12-06 17:00:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:36,370 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-12-06 17:00:36,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:00:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-12-06 17:00:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 17:00:36,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:36,372 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 17:00:36,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 17:00:36,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:36,574 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:36,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:36,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1165006364, now seen corresponding path program 1 times [2021-12-06 17:00:36,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:36,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784727757] [2021-12-06 17:00:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:36,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:36,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:36,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:36,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 17:00:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:36,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:00:36,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:00:37,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:00:37,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:37,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784727757] [2021-12-06 17:00:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784727757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:00:37,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:00:37,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 17:00:37,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051321706] [2021-12-06 17:00:37,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:00:37,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:00:37,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:00:37,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:00:37,114 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:00:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:38,015 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2021-12-06 17:00:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:00:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-12-06 17:00:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:38,018 INFO L225 Difference]: With dead ends: 127 [2021-12-06 17:00:38,018 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 17:00:38,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:00:38,019 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 34 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:38,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 587 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:00:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 17:00:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2021-12-06 17:00:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 77 states have internal predecessors, (92), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2021-12-06 17:00:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2021-12-06 17:00:38,031 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 45 [2021-12-06 17:00:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:38,032 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2021-12-06 17:00:38,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:00:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2021-12-06 17:00:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 17:00:38,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:38,034 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:38,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 17:00:38,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:38,236 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:38,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1862719454, now seen corresponding path program 1 times [2021-12-06 17:00:38,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:38,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775491295] [2021-12-06 17:00:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:38,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:38,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:38,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:38,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 17:00:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:38,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:00:38,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:00:38,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:00:39,477 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:39,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775491295] [2021-12-06 17:00:39,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775491295] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:39,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:00:39,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-12-06 17:00:39,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563578587] [2021-12-06 17:00:39,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:39,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:00:39,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:39,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:00:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:00:39,479 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:00:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:40,421 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2021-12-06 17:00:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:00:40,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-12-06 17:00:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:40,423 INFO L225 Difference]: With dead ends: 134 [2021-12-06 17:00:40,424 INFO L226 Difference]: Without dead ends: 126 [2021-12-06 17:00:40,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:00:40,425 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 53 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:40,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 678 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:00:40,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-06 17:00:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-12-06 17:00:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 85 states have internal predecessors, (102), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 17:00:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2021-12-06 17:00:40,436 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 47 [2021-12-06 17:00:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:40,436 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2021-12-06 17:00:40,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:00:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2021-12-06 17:00:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 17:00:40,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:40,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:40,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-06 17:00:40,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:40,640 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:40,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1805461152, now seen corresponding path program 1 times [2021-12-06 17:00:40,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:40,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484443666] [2021-12-06 17:00:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:40,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:40,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:40,645 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:40,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 17:00:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:00:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 17:00:40,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:00:40,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:40,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484443666] [2021-12-06 17:00:40,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484443666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:00:40,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:00:40,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:00:40,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087362624] [2021-12-06 17:00:40,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:00:40,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:00:40,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:00:40,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:00:40,832 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 17:00:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:40,981 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2021-12-06 17:00:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:00:40,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-12-06 17:00:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:40,983 INFO L225 Difference]: With dead ends: 120 [2021-12-06 17:00:40,983 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 17:00:40,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:00:40,985 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:40,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 317 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:00:40,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 17:00:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-06 17:00:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 81 states have internal predecessors, (95), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 16 states have call predecessors, (21), 14 states have call successors, (21) [2021-12-06 17:00:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2021-12-06 17:00:40,997 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 47 [2021-12-06 17:00:40,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:40,998 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2021-12-06 17:00:40,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 17:00:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2021-12-06 17:00:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 17:00:40,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:40,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 17:00:41,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-06 17:00:41,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:41,201 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:41,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:41,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2144611077, now seen corresponding path program 1 times [2021-12-06 17:00:41,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:41,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505083242] [2021-12-06 17:00:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:41,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:41,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:41,206 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:41,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 17:00:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:00:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:00:41,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:00:43,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:43,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505083242] [2021-12-06 17:00:43,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505083242] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:43,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:00:43,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-06 17:00:43,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359405496] [2021-12-06 17:00:43,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:43,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 17:00:43,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 17:00:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:00:43,601 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:00:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:47,121 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2021-12-06 17:00:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:00:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2021-12-06 17:00:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:47,124 INFO L225 Difference]: With dead ends: 152 [2021-12-06 17:00:47,124 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 17:00:47,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 17:00:47,126 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 140 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:47,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1036 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:00:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 17:00:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2021-12-06 17:00:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 69 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (24), 12 states have call predecessors, (24), 11 states have call successors, (24) [2021-12-06 17:00:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2021-12-06 17:00:47,136 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 49 [2021-12-06 17:00:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:47,136 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2021-12-06 17:00:47,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:00:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2021-12-06 17:00:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 17:00:47,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:47,138 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 17:00:47,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 17:00:47,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:47,339 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1400781647, now seen corresponding path program 2 times [2021-12-06 17:00:47,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:47,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664392958] [2021-12-06 17:00:47,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:00:47,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:47,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:47,344 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:47,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 17:00:47,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:00:47,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:00:47,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:00:47,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:00:48,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:00:49,795 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:49,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664392958] [2021-12-06 17:00:49,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664392958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:49,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:00:49,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-06 17:00:49,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135811403] [2021-12-06 17:00:49,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:49,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 17:00:49,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 17:00:49,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:00:49,798 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:00:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:53,164 INFO L93 Difference]: Finished difference Result 127 states and 174 transitions. [2021-12-06 17:00:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:00:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2021-12-06 17:00:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:53,167 INFO L225 Difference]: With dead ends: 127 [2021-12-06 17:00:53,167 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 17:00:53,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:00:53,168 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 149 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:53,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 937 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:00:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 17:00:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2021-12-06 17:00:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 70 states have internal predecessors, (81), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (27), 13 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-06 17:00:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2021-12-06 17:00:53,183 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 49 [2021-12-06 17:00:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:53,184 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2021-12-06 17:00:53,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:00:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2021-12-06 17:00:53,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 17:00:53,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:53,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:53,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 17:00:53,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:53,386 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1227181886, now seen corresponding path program 1 times [2021-12-06 17:00:53,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:53,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556236349] [2021-12-06 17:00:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:53,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:53,391 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:53,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 17:00:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:00:53,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 17:00:56,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:00:56,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:56,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556236349] [2021-12-06 17:00:56,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556236349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:00:56,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:00:56,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:00:56,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214927898] [2021-12-06 17:00:56,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:00:56,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:00:56,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:56,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:00:56,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=36, Unknown=1, NotChecked=0, Total=56 [2021-12-06 17:00:56,499 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:00:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:56,577 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2021-12-06 17:00:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:00:56,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2021-12-06 17:00:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:56,579 INFO L225 Difference]: With dead ends: 96 [2021-12-06 17:00:56,579 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 17:00:56,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-12-06 17:00:56,580 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 7 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:56,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 292 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-06 17:00:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 17:00:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-06 17:00:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 74 states have internal predecessors, (84), 14 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2021-12-06 17:00:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-12-06 17:00:56,590 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 50 [2021-12-06 17:00:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:56,590 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-12-06 17:00:56,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:00:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2021-12-06 17:00:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 17:00:56,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:56,591 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 17:00:56,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 17:00:56,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:56,793 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:56,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:56,794 INFO L85 PathProgramCache]: Analyzing trace with hash 792222103, now seen corresponding path program 1 times [2021-12-06 17:00:56,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:56,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034862607] [2021-12-06 17:00:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:56,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:56,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:56,798 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:56,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 17:00:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:56,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:00:56,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:00:57,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:00:58,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:00:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034862607] [2021-12-06 17:00:58,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034862607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:58,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:00:58,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-06 17:00:58,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156237619] [2021-12-06 17:00:58,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:58,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:00:58,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:00:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:00:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:00:58,308 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:00:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:59,648 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2021-12-06 17:00:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:00:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2021-12-06 17:00:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:59,651 INFO L225 Difference]: With dead ends: 130 [2021-12-06 17:00:59,651 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 17:00:59,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:00:59,652 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 78 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:59,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 747 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:00:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 17:00:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2021-12-06 17:00:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 77 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-12-06 17:00:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2021-12-06 17:00:59,664 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 51 [2021-12-06 17:00:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:59,664 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2021-12-06 17:00:59,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:00:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2021-12-06 17:00:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:00:59,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:59,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 17:00:59,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 17:00:59,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:00:59,866 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1615591569, now seen corresponding path program 1 times [2021-12-06 17:00:59,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:00:59,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22054081] [2021-12-06 17:00:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:59,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:00:59,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:00:59,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:00:59,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 17:00:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:00:59,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:00:59,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:01:00,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:01:00,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22054081] [2021-12-06 17:01:00,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22054081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:01:00,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:01:00,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:01:00,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854874169] [2021-12-06 17:01:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:01:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:01:00,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:00,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:01:00,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:01:00,297 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:01:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:00,686 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2021-12-06 17:01:00,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:01:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2021-12-06 17:01:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:00,688 INFO L225 Difference]: With dead ends: 160 [2021-12-06 17:01:00,688 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 17:01:00,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:01:00,689 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:00,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:01:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 17:01:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2021-12-06 17:01:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 71 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2021-12-06 17:01:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2021-12-06 17:01:00,701 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 55 [2021-12-06 17:01:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:00,701 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2021-12-06 17:01:00,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:01:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2021-12-06 17:01:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 17:01:00,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:00,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 17:01:00,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 17:01:00,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:00,904 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:00,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 381005423, now seen corresponding path program 1 times [2021-12-06 17:01:00,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:00,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10502319] [2021-12-06 17:01:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:00,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:00,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:00,909 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:00,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 17:01:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:01:00,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 17:01:07,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:01:07,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:07,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10502319] [2021-12-06 17:01:07,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10502319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:01:07,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:01:07,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:01:07,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454650657] [2021-12-06 17:01:07,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:01:07,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:01:07,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:01:07,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2021-12-06 17:01:07,612 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:01:07,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:07,688 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2021-12-06 17:01:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:01:07,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2021-12-06 17:01:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:07,689 INFO L225 Difference]: With dead ends: 95 [2021-12-06 17:01:07,689 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 17:01:07,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2021-12-06 17:01:07,690 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 14 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:07,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 432 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 30 Unchecked, 0.0s Time] [2021-12-06 17:01:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 17:01:07,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-12-06 17:01:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.21875) internal successors, (78), 68 states have internal predecessors, (78), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2021-12-06 17:01:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2021-12-06 17:01:07,698 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 51 [2021-12-06 17:01:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:07,698 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2021-12-06 17:01:07,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:01:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2021-12-06 17:01:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:01:07,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:07,700 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:07,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 17:01:07,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:07,900 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash 57968830, now seen corresponding path program 1 times [2021-12-06 17:01:07,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:07,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131894660] [2021-12-06 17:01:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:07,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:07,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:07,901 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:07,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 17:01:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:07,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:01:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:01:08,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:01:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:01:08,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:08,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131894660] [2021-12-06 17:01:08,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131894660] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:01:08,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:01:08,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-06 17:01:08,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520392649] [2021-12-06 17:01:08,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:01:08,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:01:08,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:01:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:01:08,768 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:01:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:09,313 INFO L93 Difference]: Finished difference Result 112 states and 164 transitions. [2021-12-06 17:01:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:01:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2021-12-06 17:01:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:09,315 INFO L225 Difference]: With dead ends: 112 [2021-12-06 17:01:09,316 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 17:01:09,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:01:09,317 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 157 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:09,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 351 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:01:09,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 17:01:09,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2021-12-06 17:01:09,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2021-12-06 17:01:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2021-12-06 17:01:09,325 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 55 [2021-12-06 17:01:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:09,325 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2021-12-06 17:01:09,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:01:09,325 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2021-12-06 17:01:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:01:09,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:09,326 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:01:09,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 17:01:09,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:09,527 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash -768011691, now seen corresponding path program 1 times [2021-12-06 17:01:09,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:09,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260025521] [2021-12-06 17:01:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:09,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:09,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:09,529 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:09,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 17:01:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:01:09,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:01:09,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:01:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:01:10,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:10,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260025521] [2021-12-06 17:01:10,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260025521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:01:10,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:01:10,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-06 17:01:10,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765703560] [2021-12-06 17:01:10,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:01:10,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:01:10,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:01:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:01:10,562 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:11,270 INFO L93 Difference]: Finished difference Result 112 states and 162 transitions. [2021-12-06 17:01:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:01:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2021-12-06 17:01:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:11,272 INFO L225 Difference]: With dead ends: 112 [2021-12-06 17:01:11,272 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 17:01:11,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:01:11,273 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 97 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:11,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 507 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:01:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 17:01:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2021-12-06 17:01:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2021-12-06 17:01:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2021-12-06 17:01:11,284 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 64 [2021-12-06 17:01:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:11,284 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2021-12-06 17:01:11,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2021-12-06 17:01:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:01:11,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:11,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:11,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 17:01:11,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:11,487 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash -773215852, now seen corresponding path program 1 times [2021-12-06 17:01:11,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:11,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919322024] [2021-12-06 17:01:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:11,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:11,492 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:11,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 17:01:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:11,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:01:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:01:11,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:01:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:01:12,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919322024] [2021-12-06 17:01:12,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919322024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:01:12,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:01:12,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-06 17:01:12,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831245457] [2021-12-06 17:01:12,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:01:12,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:01:12,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:12,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:01:12,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:01:12,483 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:13,096 INFO L93 Difference]: Finished difference Result 110 states and 154 transitions. [2021-12-06 17:01:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:01:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2021-12-06 17:01:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:13,098 INFO L225 Difference]: With dead ends: 110 [2021-12-06 17:01:13,098 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 17:01:13,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:01:13,103 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 117 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:13,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 529 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:01:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 17:01:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2021-12-06 17:01:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.203125) internal successors, (77), 68 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2021-12-06 17:01:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2021-12-06 17:01:13,111 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 64 [2021-12-06 17:01:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:13,111 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2021-12-06 17:01:13,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2021-12-06 17:01:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:01:13,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:13,113 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:01:13,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 17:01:13,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:13,315 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash 336770129, now seen corresponding path program 1 times [2021-12-06 17:01:13,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:13,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917033440] [2021-12-06 17:01:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:13,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:13,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:13,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 17:01:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:01:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:01:13,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:01:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:01:14,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:14,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917033440] [2021-12-06 17:01:14,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917033440] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:01:14,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:01:14,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-06 17:01:14,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877113731] [2021-12-06 17:01:14,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:01:14,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:01:14,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:01:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:01:14,386 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:14,960 INFO L93 Difference]: Finished difference Result 107 states and 148 transitions. [2021-12-06 17:01:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:01:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2021-12-06 17:01:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:14,962 INFO L225 Difference]: With dead ends: 107 [2021-12-06 17:01:14,962 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 17:01:14,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:01:14,963 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 129 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:14,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 441 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:01:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 17:01:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2021-12-06 17:01:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 65 states have internal predecessors, (74), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2021-12-06 17:01:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2021-12-06 17:01:14,971 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 66 [2021-12-06 17:01:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:14,971 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2021-12-06 17:01:14,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2021-12-06 17:01:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 17:01:14,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:14,973 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:14,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 17:01:15,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:15,174 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:15,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash -644666623, now seen corresponding path program 1 times [2021-12-06 17:01:15,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:15,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523158610] [2021-12-06 17:01:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:15,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:15,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:15,179 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:15,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 17:01:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:15,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:01:15,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:01:19,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:01:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:01:24,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:24,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523158610] [2021-12-06 17:01:24,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523158610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:01:24,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:01:24,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-12-06 17:01:24,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341046084] [2021-12-06 17:01:24,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:01:24,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:01:24,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:24,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:01:24,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:01:24,284 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-06 17:01:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:28,928 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2021-12-06 17:01:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:01:28,928 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2021-12-06 17:01:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:28,929 INFO L225 Difference]: With dead ends: 107 [2021-12-06 17:01:28,929 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 17:01:28,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 17:01:28,931 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 61 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:28,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 958 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 205 Invalid, 0 Unknown, 91 Unchecked, 0.8s Time] [2021-12-06 17:01:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 17:01:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2021-12-06 17:01:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 70 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 12 states have call predecessors, (29), 11 states have call successors, (29) [2021-12-06 17:01:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2021-12-06 17:01:28,939 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 73 [2021-12-06 17:01:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:28,940 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2021-12-06 17:01:28,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-06 17:01:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2021-12-06 17:01:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 17:01:28,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:28,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:28,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 17:01:29,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:29,142 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:29,143 INFO L85 PathProgramCache]: Analyzing trace with hash -719396020, now seen corresponding path program 1 times [2021-12-06 17:01:29,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:29,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345822125] [2021-12-06 17:01:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:29,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:29,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:29,147 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:29,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 17:01:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 17:01:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 17:01:30,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:01:30,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:30,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345822125] [2021-12-06 17:01:30,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345822125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:01:30,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:01:30,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 17:01:30,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562894091] [2021-12-06 17:01:30,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:01:30,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:01:30,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:01:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:01:30,394 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:31,798 INFO L93 Difference]: Finished difference Result 109 states and 148 transitions. [2021-12-06 17:01:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:01:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2021-12-06 17:01:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:31,800 INFO L225 Difference]: With dead ends: 109 [2021-12-06 17:01:31,800 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 17:01:31,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:01:31,801 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 47 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:31,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 592 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:01:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 17:01:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-12-06 17:01:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 74 states have internal predecessors, (83), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (33), 13 states have call predecessors, (33), 12 states have call successors, (33) [2021-12-06 17:01:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 129 transitions. [2021-12-06 17:01:31,812 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 129 transitions. Word has length 73 [2021-12-06 17:01:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:31,813 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 129 transitions. [2021-12-06 17:01:31,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 129 transitions. [2021-12-06 17:01:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 17:01:31,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:31,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:31,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 17:01:32,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:32,016 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:32,017 INFO L85 PathProgramCache]: Analyzing trace with hash -425811905, now seen corresponding path program 1 times [2021-12-06 17:01:32,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:32,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556330914] [2021-12-06 17:01:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:32,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:32,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:32,021 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:32,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 17:01:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:32,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:01:32,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 17:01:33,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:01:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:01:36,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:36,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556330914] [2021-12-06 17:01:36,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556330914] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:01:36,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:01:36,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-12-06 17:01:36,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238964693] [2021-12-06 17:01:36,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:01:36,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:01:36,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:36,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:01:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:01:36,266 INFO L87 Difference]: Start difference. First operand 93 states and 129 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:01:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:41,053 INFO L93 Difference]: Finished difference Result 114 states and 156 transitions. [2021-12-06 17:01:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:01:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 73 [2021-12-06 17:01:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:41,056 INFO L225 Difference]: With dead ends: 114 [2021-12-06 17:01:41,057 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 17:01:41,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:01:41,058 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 153 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:41,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 703 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:01:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 17:01:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2021-12-06 17:01:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 73 states have internal predecessors, (82), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2021-12-06 17:01:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2021-12-06 17:01:41,070 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 73 [2021-12-06 17:01:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:41,070 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2021-12-06 17:01:41,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:01:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2021-12-06 17:01:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 17:01:41,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:41,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:41,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 17:01:41,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:41,273 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:41,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1804933507, now seen corresponding path program 2 times [2021-12-06 17:01:41,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:41,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853598096] [2021-12-06 17:01:41,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:01:41,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:41,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:41,277 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:41,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 17:01:41,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:01:41,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:01:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:01:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 17:01:42,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:01:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:01:45,525 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:45,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853598096] [2021-12-06 17:01:45,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853598096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:01:45,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:01:45,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-12-06 17:01:45,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575731584] [2021-12-06 17:01:45,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:01:45,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:01:45,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:01:45,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:01:45,527 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:01:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:50,455 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2021-12-06 17:01:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:01:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 73 [2021-12-06 17:01:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:50,458 INFO L225 Difference]: With dead ends: 112 [2021-12-06 17:01:50,458 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 17:01:50,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:01:50,459 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 174 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:50,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 683 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:01:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 17:01:50,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2021-12-06 17:01:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 11 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (19), 11 states have call predecessors, (19), 10 states have call successors, (19) [2021-12-06 17:01:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2021-12-06 17:01:50,466 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 73 [2021-12-06 17:01:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:50,467 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2021-12-06 17:01:50,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:01:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2021-12-06 17:01:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 17:01:50,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:50,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:50,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 17:01:50,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:50,669 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1949058828, now seen corresponding path program 1 times [2021-12-06 17:01:50,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:50,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14421450] [2021-12-06 17:01:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:50,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:50,674 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:50,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 17:01:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:50,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:01:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 17:01:51,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:01:51,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:51,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14421450] [2021-12-06 17:01:51,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14421450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:01:51,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:01:51,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:01:51,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405715805] [2021-12-06 17:01:51,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:01:51,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:01:51,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:01:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:01:51,765 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:52,845 INFO L93 Difference]: Finished difference Result 100 states and 128 transitions. [2021-12-06 17:01:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:01:52,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2021-12-06 17:01:52,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:52,847 INFO L225 Difference]: With dead ends: 100 [2021-12-06 17:01:52,848 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 17:01:52,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:01:52,849 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 28 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:52,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 517 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:01:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 17:01:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2021-12-06 17:01:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-06 17:01:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2021-12-06 17:01:52,858 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 73 [2021-12-06 17:01:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:52,858 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2021-12-06 17:01:52,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2021-12-06 17:01:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 17:01:52,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:52,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:52,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-06 17:01:53,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:53,061 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash 555904934, now seen corresponding path program 1 times [2021-12-06 17:01:53,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:53,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573672765] [2021-12-06 17:01:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:53,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:53,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:53,066 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:53,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 17:01:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:53,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:01:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 17:01:53,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:01:53,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:53,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573672765] [2021-12-06 17:01:53,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573672765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:01:53,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:01:53,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:01:53,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769430446] [2021-12-06 17:01:53,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:01:53,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:01:53,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:01:53,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:01:53,574 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:01:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:53,791 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2021-12-06 17:01:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:01:53,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2021-12-06 17:01:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:53,793 INFO L225 Difference]: With dead ends: 84 [2021-12-06 17:01:53,793 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 17:01:53,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:01:53,794 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 7 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:53,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 391 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:01:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 17:01:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-12-06 17:01:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 17:01:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-12-06 17:01:53,802 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 75 [2021-12-06 17:01:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:53,802 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-12-06 17:01:53,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:01:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-12-06 17:01:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 17:01:53,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:53,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:53,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-06 17:01:54,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:54,004 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:54,006 INFO L85 PathProgramCache]: Analyzing trace with hash 481175537, now seen corresponding path program 1 times [2021-12-06 17:01:54,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:54,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928087642] [2021-12-06 17:01:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:54,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:54,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:54,009 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:54,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 17:01:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:54,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:01:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:01:56,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:01:58,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:01:58,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928087642] [2021-12-06 17:01:58,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928087642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:01:58,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [787741953] [2021-12-06 17:01:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:58,156 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:01:58,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:01:58,158 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:01:58,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-12-06 17:01:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:01:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:01:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 17:01:59,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:01:59,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [787741953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:01:59,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:01:59,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2021-12-06 17:01:59,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410968708] [2021-12-06 17:01:59,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:01:59,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:01:59,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:01:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:01:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:01:59,158 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:01:59,350 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2021-12-06 17:01:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:01:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2021-12-06 17:01:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:01:59,352 INFO L225 Difference]: With dead ends: 111 [2021-12-06 17:01:59,352 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 17:01:59,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:01:59,353 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 22 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:01:59,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 284 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:01:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 17:01:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-12-06 17:01:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 74 states have internal predecessors, (83), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (27), 13 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-06 17:01:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 123 transitions. [2021-12-06 17:01:59,364 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 123 transitions. Word has length 75 [2021-12-06 17:01:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:01:59,364 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 123 transitions. [2021-12-06 17:01:59,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 17:01:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 123 transitions. [2021-12-06 17:01:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 17:01:59,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:01:59,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:01:59,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-12-06 17:01:59,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-06 17:01:59,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:01:59,767 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:01:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:01:59,768 INFO L85 PathProgramCache]: Analyzing trace with hash 700030255, now seen corresponding path program 1 times [2021-12-06 17:01:59,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:01:59,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494997298] [2021-12-06 17:01:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:01:59,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:01:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:01:59,772 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:01:59,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 17:01:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:01:59,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:01:59,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:02:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 17:02:01,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:02:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:02:03,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:02:03,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494997298] [2021-12-06 17:02:03,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494997298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:02:03,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:02:03,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-12-06 17:02:03,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610228212] [2021-12-06 17:02:03,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:02:03,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:02:03,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:02:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:02:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:02:03,989 INFO L87 Difference]: Start difference. First operand 93 states and 123 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:02:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:02:09,028 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2021-12-06 17:02:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:02:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 75 [2021-12-06 17:02:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:02:09,031 INFO L225 Difference]: With dead ends: 116 [2021-12-06 17:02:09,031 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 17:02:09,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:02:09,032 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 201 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:02:09,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 712 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:02:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 17:02:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 90. [2021-12-06 17:02:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.208955223880597) internal successors, (81), 71 states have internal predecessors, (81), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (23), 13 states have call predecessors, (23), 12 states have call successors, (23) [2021-12-06 17:02:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2021-12-06 17:02:09,041 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 75 [2021-12-06 17:02:09,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:02:09,041 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2021-12-06 17:02:09,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:02:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2021-12-06 17:02:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 17:02:09,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:02:09,042 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:02:09,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-06 17:02:09,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:02:09,243 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:02:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:02:09,243 INFO L85 PathProgramCache]: Analyzing trace with hash 904822259, now seen corresponding path program 2 times [2021-12-06 17:02:09,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:02:09,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350474456] [2021-12-06 17:02:09,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:02:09,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:02:09,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:02:09,244 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:02:09,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 17:02:09,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:02:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:02:09,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:02:09,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:02:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 17:02:10,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:02:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:02:13,472 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:02:13,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350474456] [2021-12-06 17:02:13,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350474456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:02:13,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:02:13,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-12-06 17:02:13,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155108357] [2021-12-06 17:02:13,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:02:13,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:02:13,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:02:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:02:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:02:13,473 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:02:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:02:18,764 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2021-12-06 17:02:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:02:18,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 75 [2021-12-06 17:02:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:02:18,767 INFO L225 Difference]: With dead ends: 116 [2021-12-06 17:02:18,768 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 17:02:18,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:02:18,769 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 171 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:02:18,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 868 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:02:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 17:02:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-12-06 17:02:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-06 17:02:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2021-12-06 17:02:18,777 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 75 [2021-12-06 17:02:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:02:18,778 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2021-12-06 17:02:18,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:02:18,778 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2021-12-06 17:02:18,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 17:02:18,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:02:18,779 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-06 17:02:18,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-06 17:02:18,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:02:18,980 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:02:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:02:18,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1627177794, now seen corresponding path program 1 times [2021-12-06 17:02:18,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:02:18,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20692712] [2021-12-06 17:02:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:02:18,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:02:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:02:18,981 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:02:18,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 17:02:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:02:19,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 17:02:19,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:02:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 17:02:20,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:02:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:02:25,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:02:25,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20692712] [2021-12-06 17:02:25,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20692712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:02:25,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:02:25,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2021-12-06 17:02:25,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714543707] [2021-12-06 17:02:25,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:02:25,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 17:02:25,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:02:25,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 17:02:25,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:02:25,314 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:02:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:02:35,214 INFO L93 Difference]: Finished difference Result 117 states and 153 transitions. [2021-12-06 17:02:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:02:35,216 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2021-12-06 17:02:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:02:35,217 INFO L225 Difference]: With dead ends: 117 [2021-12-06 17:02:35,217 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 17:02:35,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:02:35,219 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 135 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:02:35,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1304 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-06 17:02:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 17:02:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2021-12-06 17:02:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 77 states have internal predecessors, (84), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (32), 16 states have call predecessors, (32), 15 states have call successors, (32) [2021-12-06 17:02:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2021-12-06 17:02:35,230 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 82 [2021-12-06 17:02:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:02:35,231 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2021-12-06 17:02:35,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:02:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2021-12-06 17:02:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 17:02:35,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:02:35,232 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-06 17:02:35,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 17:02:35,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:02:35,433 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:02:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:02:35,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2114830850, now seen corresponding path program 2 times [2021-12-06 17:02:35,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:02:35,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076904600] [2021-12-06 17:02:35,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:02:35,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:02:35,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:02:35,438 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:02:35,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-06 17:02:35,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:02:35,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:02:35,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 17:02:35,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:02:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 17:02:37,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:02:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:02:41,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:02:41,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076904600] [2021-12-06 17:02:41,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076904600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:02:41,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:02:41,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2021-12-06 17:02:41,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355444921] [2021-12-06 17:02:41,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:02:41,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 17:02:41,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:02:41,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 17:02:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:02:41,839 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:02:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:02:51,839 INFO L93 Difference]: Finished difference Result 119 states and 159 transitions. [2021-12-06 17:02:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:02:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2021-12-06 17:02:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:02:51,842 INFO L225 Difference]: With dead ends: 119 [2021-12-06 17:02:51,842 INFO L226 Difference]: Without dead ends: 108 [2021-12-06 17:02:51,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:02:51,844 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 138 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:02:51,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 987 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-06 17:02:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-06 17:02:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-12-06 17:02:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 78 states have internal predecessors, (85), 17 states have call successors, (17), 5 states have call predecessors, (17), 10 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2021-12-06 17:02:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 136 transitions. [2021-12-06 17:02:51,862 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 136 transitions. Word has length 82 [2021-12-06 17:02:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:02:51,862 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 136 transitions. [2021-12-06 17:02:51,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:02:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 136 transitions. [2021-12-06 17:02:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 17:02:51,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:02:51,864 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 17:02:51,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-06 17:02:52,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:02:52,066 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:02:52,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:02:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1402295107, now seen corresponding path program 1 times [2021-12-06 17:02:52,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:02:52,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025457516] [2021-12-06 17:02:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:02:52,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:02:52,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:02:52,071 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:02:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 17:02:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:02:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:02:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:02:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:02:52,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:02:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:02:53,859 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:02:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025457516] [2021-12-06 17:02:53,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025457516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:02:53,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:02:53,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-12-06 17:02:53,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149906750] [2021-12-06 17:02:53,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:02:53,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:02:53,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:02:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:02:53,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:02:53,861 INFO L87 Difference]: Start difference. First operand 101 states and 136 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:02:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:02:55,226 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2021-12-06 17:02:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:02:55,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 83 [2021-12-06 17:02:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:02:55,228 INFO L225 Difference]: With dead ends: 110 [2021-12-06 17:02:55,228 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 17:02:55,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:02:55,229 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 132 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:02:55,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 568 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:02:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 17:02:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-06 17:02:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 77 states have internal predecessors, (84), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (32), 16 states have call predecessors, (32), 15 states have call successors, (32) [2021-12-06 17:02:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2021-12-06 17:02:55,246 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 83 [2021-12-06 17:02:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:02:55,246 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2021-12-06 17:02:55,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:02:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2021-12-06 17:02:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 17:02:55,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:02:55,249 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-06 17:02:55,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-06 17:02:55,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:02:55,450 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:02:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:02:55,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1128450436, now seen corresponding path program 1 times [2021-12-06 17:02:55,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:02:55,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671586389] [2021-12-06 17:02:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:02:55,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:02:55,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:02:55,455 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:02:55,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-06 17:02:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:02:55,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 17:02:55,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:02:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 17:02:57,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:03:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:03:02,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:03:02,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671586389] [2021-12-06 17:03:02,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671586389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:03:02,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:03:02,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2021-12-06 17:03:02,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841670209] [2021-12-06 17:03:02,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:03:02,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 17:03:02,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:03:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 17:03:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:03:02,021 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:03:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:03:12,004 INFO L93 Difference]: Finished difference Result 113 states and 147 transitions. [2021-12-06 17:03:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:03:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 80 [2021-12-06 17:03:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:03:12,007 INFO L225 Difference]: With dead ends: 113 [2021-12-06 17:03:12,007 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 17:03:12,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:03:12,008 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 159 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:03:12,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1069 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-06 17:03:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 17:03:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2021-12-06 17:03:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 77 states have internal predecessors, (84), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (28), 16 states have call predecessors, (28), 15 states have call successors, (28) [2021-12-06 17:03:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2021-12-06 17:03:12,019 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 80 [2021-12-06 17:03:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:03:12,019 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2021-12-06 17:03:12,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:03:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2021-12-06 17:03:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 17:03:12,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:03:12,021 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 17:03:12,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-06 17:03:12,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:03:12,221 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:03:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1440446079, now seen corresponding path program 2 times [2021-12-06 17:03:12,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:03:12,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961924337] [2021-12-06 17:03:12,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:03:12,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:03:12,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:03:12,223 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:03:12,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-06 17:03:12,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:03:12,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:03:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:03:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:03:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:03:12,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:03:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:03:13,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:03:13,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961924337] [2021-12-06 17:03:13,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961924337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:03:13,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:03:13,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-12-06 17:03:13,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507470027] [2021-12-06 17:03:13,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:03:13,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:03:13,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:03:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:03:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:03:13,960 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:03:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:03:15,392 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2021-12-06 17:03:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:03:15,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 83 [2021-12-06 17:03:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:03:15,394 INFO L225 Difference]: With dead ends: 106 [2021-12-06 17:03:15,394 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 17:03:15,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:03:15,395 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 113 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:03:15,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 700 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:03:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 17:03:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-06 17:03:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.173913043478261) internal successors, (81), 75 states have internal predecessors, (81), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2021-12-06 17:03:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2021-12-06 17:03:15,406 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 83 [2021-12-06 17:03:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:03:15,406 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2021-12-06 17:03:15,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:03:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2021-12-06 17:03:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 17:03:15,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:03:15,408 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-06 17:03:15,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-06 17:03:15,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:03:15,609 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:03:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:15,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1457098876, now seen corresponding path program 2 times [2021-12-06 17:03:15,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:03:15,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384198265] [2021-12-06 17:03:15,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:03:15,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:03:15,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:03:15,614 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:03:15,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-06 17:03:15,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:03:15,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:03:15,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 17:03:15,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:03:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 17:03:17,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:03:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:03:21,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:03:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384198265] [2021-12-06 17:03:21,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384198265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:03:21,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:03:21,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2021-12-06 17:03:21,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543716900] [2021-12-06 17:03:21,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:03:21,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 17:03:21,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:03:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 17:03:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:03:21,839 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:03:31,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:03:31,259 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2021-12-06 17:03:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:03:31,261 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 80 [2021-12-06 17:03:31,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:03:31,262 INFO L225 Difference]: With dead ends: 109 [2021-12-06 17:03:31,262 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 17:03:31,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:03:31,263 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 131 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:03:31,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1282 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-06 17:03:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 17:03:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-12-06 17:03:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.173913043478261) internal successors, (81), 75 states have internal predecessors, (81), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) [2021-12-06 17:03:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2021-12-06 17:03:31,278 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 80 [2021-12-06 17:03:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:03:31,279 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2021-12-06 17:03:31,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:03:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2021-12-06 17:03:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 17:03:31,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:03:31,280 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 17:03:31,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-06 17:03:31,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:03:31,481 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:03:31,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash 416569969, now seen corresponding path program 1 times [2021-12-06 17:03:31,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:03:31,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208291408] [2021-12-06 17:03:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:31,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:03:31,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:03:31,486 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:03:31,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-06 17:03:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:31,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:03:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:03:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:03:32,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:03:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:03:33,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:03:33,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208291408] [2021-12-06 17:03:33,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208291408] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:03:33,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:03:33,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-12-06 17:03:33,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849398571] [2021-12-06 17:03:33,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:03:33,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:03:33,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:03:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:03:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:03:33,195 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:03:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:03:34,533 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2021-12-06 17:03:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:03:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 81 [2021-12-06 17:03:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:03:34,535 INFO L225 Difference]: With dead ends: 109 [2021-12-06 17:03:34,535 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 17:03:34,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:03:34,536 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 141 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:03:34,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 579 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:03:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 17:03:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2021-12-06 17:03:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 67 states have (on average 1.164179104477612) internal successors, (78), 72 states have internal predecessors, (78), 15 states have call successors, (15), 5 states have call predecessors, (15), 9 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2021-12-06 17:03:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2021-12-06 17:03:34,549 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 81 [2021-12-06 17:03:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:03:34,549 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2021-12-06 17:03:34,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:03:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2021-12-06 17:03:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 17:03:34,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:03:34,550 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:03:34,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-06 17:03:34,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:03:34,752 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:03:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:34,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1958643556, now seen corresponding path program 1 times [2021-12-06 17:03:34,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:03:34,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651370761] [2021-12-06 17:03:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:34,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:03:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:03:34,756 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:03:34,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-06 17:03:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:34,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:03:34,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:03:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:03:38,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:03:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:03:49,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:03:49,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651370761] [2021-12-06 17:03:49,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651370761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:03:49,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:03:49,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-12-06 17:03:49,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937198212] [2021-12-06 17:03:49,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:03:49,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:03:49,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:03:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:03:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:03:49,456 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 39 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 35 states have internal predecessors, (70), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:04:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:04:19,313 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2021-12-06 17:04:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:04:19,317 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 35 states have internal predecessors, (70), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 85 [2021-12-06 17:04:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:04:19,317 INFO L225 Difference]: With dead ends: 101 [2021-12-06 17:04:19,318 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 17:04:19,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=354, Invalid=3806, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 17:04:19,320 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 90 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:04:19,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1529 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1192 Invalid, 0 Unknown, 76 Unchecked, 13.3s Time] [2021-12-06 17:04:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 17:04:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-12-06 17:04:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 73 states have internal predecessors, (80), 15 states have call successors, (15), 5 states have call predecessors, (15), 9 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-12-06 17:04:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-12-06 17:04:19,330 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 85 [2021-12-06 17:04:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:04:19,330 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-12-06 17:04:19,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 35 states have internal predecessors, (70), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:04:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-12-06 17:04:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 17:04:19,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:04:19,331 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-12-06 17:04:19,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-12-06 17:04:19,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:04:19,533 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:04:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash -155373131, now seen corresponding path program 2 times [2021-12-06 17:04:19,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:04:19,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716332427] [2021-12-06 17:04:19,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:04:19,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:04:19,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:04:19,538 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:04:19,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-06 17:04:19,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:04:19,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:04:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:04:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:04:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:04:20,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:04:21,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:04:21,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716332427] [2021-12-06 17:04:21,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716332427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:21,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:04:21,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-12-06 17:04:21,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851566755] [2021-12-06 17:04:21,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:21,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:04:21,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:04:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:04:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:04:21,352 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:04:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:04:22,770 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2021-12-06 17:04:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:04:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 81 [2021-12-06 17:04:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:04:22,772 INFO L225 Difference]: With dead ends: 108 [2021-12-06 17:04:22,772 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 17:04:22,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:04:22,773 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 141 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:04:22,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 675 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:04:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 17:04:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-12-06 17:04:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 70 states have internal predecessors, (77), 15 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-06 17:04:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2021-12-06 17:04:22,783 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 81 [2021-12-06 17:04:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:04:22,784 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2021-12-06 17:04:22,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:04:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2021-12-06 17:04:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 17:04:22,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:04:22,785 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:22,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-12-06 17:04:22,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:04:22,985 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:04:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1615490404, now seen corresponding path program 2 times [2021-12-06 17:04:22,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:04:22,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181594302] [2021-12-06 17:04:22,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:04:22,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:04:22,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:04:22,987 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:04:22,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-06 17:04:23,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:04:23,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:04:23,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:04:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:04:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:04:26,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:04:38,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:04:38,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181594302] [2021-12-06 17:04:38,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181594302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:38,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:04:38,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-12-06 17:04:38,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251075356] [2021-12-06 17:04:38,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:38,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:04:38,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:04:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:04:38,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:04:38,207 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 39 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 35 states have internal predecessors, (70), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:05:04,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 17:05:10,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:10,092 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2021-12-06 17:05:10,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:05:10,096 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 35 states have internal predecessors, (70), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 85 [2021-12-06 17:05:10,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:10,097 INFO L225 Difference]: With dead ends: 100 [2021-12-06 17:05:10,097 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 17:05:10,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=330, Invalid=3210, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 17:05:10,099 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 76 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:10,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1459 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1068 Invalid, 0 Unknown, 81 Unchecked, 13.5s Time] [2021-12-06 17:05:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 17:05:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-12-06 17:05:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 70 states have internal predecessors, (77), 15 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-06 17:05:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2021-12-06 17:05:10,109 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 85 [2021-12-06 17:05:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:10,110 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2021-12-06 17:05:10,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 35 states have internal predecessors, (70), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:05:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2021-12-06 17:05:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 17:05:10,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:10,111 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:05:10,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-12-06 17:05:10,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:05:10,311 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:10,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1087775420, now seen corresponding path program 1 times [2021-12-06 17:05:10,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:05:10,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755499230] [2021-12-06 17:05:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:10,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:05:10,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:05:10,313 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:05:10,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-06 17:05:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:10,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 17:05:10,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:05:14,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:05:27,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:05:27,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755499230] [2021-12-06 17:05:27,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755499230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:27,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:05:27,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-12-06 17:05:27,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767005352] [2021-12-06 17:05:27,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:27,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 17:05:27,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:05:27,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 17:05:27,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:05:27,762 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 39 states have internal predecessors, (74), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:05:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:42,934 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2021-12-06 17:05:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:05:42,935 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 39 states have internal predecessors, (74), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 87 [2021-12-06 17:05:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:42,936 INFO L225 Difference]: With dead ends: 98 [2021-12-06 17:05:42,936 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 17:05:42,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=224, Invalid=3198, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 17:05:42,938 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 41 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:42,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1679 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1143 Invalid, 0 Unknown, 98 Unchecked, 8.1s Time] [2021-12-06 17:05:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 17:05:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2021-12-06 17:05:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 70 states have internal predecessors, (77), 15 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-06 17:05:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2021-12-06 17:05:42,948 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 87 [2021-12-06 17:05:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:42,948 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2021-12-06 17:05:42,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 39 states have internal predecessors, (74), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:05:42,949 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2021-12-06 17:05:42,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 17:05:42,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:42,949 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2021-12-06 17:05:42,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-12-06 17:05:43,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:05:43,151 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1508152670, now seen corresponding path program 1 times [2021-12-06 17:05:43,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:05:43,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755457126] [2021-12-06 17:05:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:43,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:05:43,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:05:43,156 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:05:43,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-06 17:05:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:43,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 17:05:43,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:05:47,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:05:58,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:05:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755457126] [2021-12-06 17:05:58,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755457126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:58,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:05:58,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-12-06 17:05:58,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550547185] [2021-12-06 17:05:58,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:58,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:05:58,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:05:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:05:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:05:58,060 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:06:06,412 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 [] [2021-12-06 17:06:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:06:29,313 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2021-12-06 17:06:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 17:06:29,317 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 87 [2021-12-06 17:06:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:06:29,318 INFO L225 Difference]: With dead ends: 101 [2021-12-06 17:06:29,318 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 17:06:29,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=330, Invalid=3210, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 17:06:29,320 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 102 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:06:29,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1499 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 967 Invalid, 0 Unknown, 67 Unchecked, 14.0s Time] [2021-12-06 17:06:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 17:06:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-12-06 17:06:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 69 states have internal predecessors, (76), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2021-12-06 17:06:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2021-12-06 17:06:29,330 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 87 [2021-12-06 17:06:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:06:29,330 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2021-12-06 17:06:29,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:06:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2021-12-06 17:06:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 17:06:29,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:06:29,331 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:06:29,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-12-06 17:06:29,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:06:29,533 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:06:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:06:29,534 INFO L85 PathProgramCache]: Analyzing trace with hash -134401656, now seen corresponding path program 2 times [2021-12-06 17:06:29,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:06:29,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623123695] [2021-12-06 17:06:29,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:06:29,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:06:29,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:06:29,538 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:06:29,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-06 17:06:29,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:06:29,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:06:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 17:06:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:06:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:06:34,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:06:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:06:47,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:06:47,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623123695] [2021-12-06 17:06:47,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623123695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:06:47,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:06:47,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-12-06 17:06:47,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916999457] [2021-12-06 17:06:47,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:06:47,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 17:06:47,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:06:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 17:06:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:06:47,399 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 39 states have internal predecessors, (74), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:07:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:07:04,277 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2021-12-06 17:07:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 17:07:04,279 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 39 states have internal predecessors, (74), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 87 [2021-12-06 17:07:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:07:04,280 INFO L225 Difference]: With dead ends: 101 [2021-12-06 17:07:04,280 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 17:07:04,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=228, Invalid=3312, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 17:07:04,282 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 48 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:07:04,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1904 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1381 Invalid, 0 Unknown, 112 Unchecked, 9.4s Time] [2021-12-06 17:07:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 17:07:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2021-12-06 17:07:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 69 states have internal predecessors, (76), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2021-12-06 17:07:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2021-12-06 17:07:04,293 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 87 [2021-12-06 17:07:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:07:04,293 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2021-12-06 17:07:04,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 39 states have internal predecessors, (74), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:07:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2021-12-06 17:07:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 17:07:04,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:07:04,294 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2021-12-06 17:07:04,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-12-06 17:07:04,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:07:04,496 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:07:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:07:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash -643874746, now seen corresponding path program 1 times [2021-12-06 17:07:04,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:07:04,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233262476] [2021-12-06 17:07:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:07:04,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:07:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:07:04,502 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:07:04,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-06 17:07:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:07:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 17:07:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:07:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 17:07:10,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:07:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:07:30,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:07:30,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233262476] [2021-12-06 17:07:30,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233262476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:07:30,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:07:30,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 45 [2021-12-06 17:07:30,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764937882] [2021-12-06 17:07:30,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:07:30,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 17:07:30,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:07:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 17:07:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1828, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 17:07:30,245 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-06 17:08:06,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:08:06,711 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2021-12-06 17:08:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:08:06,712 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) Word has length 87 [2021-12-06 17:08:06,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:08:06,712 INFO L225 Difference]: With dead ends: 104 [2021-12-06 17:08:06,713 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 17:08:06,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=478, Invalid=4352, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 17:08:06,715 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 69 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:08:06,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1661 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1308 Invalid, 0 Unknown, 126 Unchecked, 11.4s Time] [2021-12-06 17:08:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 17:08:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-12-06 17:08:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.140625) internal successors, (73), 68 states have internal predecessors, (73), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2021-12-06 17:08:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2021-12-06 17:08:06,734 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 87 [2021-12-06 17:08:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:08:06,734 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2021-12-06 17:08:06,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-06 17:08:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2021-12-06 17:08:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 17:08:06,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:08:06,736 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2021-12-06 17:08:06,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-12-06 17:08:06,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:08:06,936 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:08:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:08:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1844511906, now seen corresponding path program 2 times [2021-12-06 17:08:06,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:08:06,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612614765] [2021-12-06 17:08:06,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:08:06,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:08:06,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:08:06,938 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:08:06,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-06 17:08:07,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:08:07,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:08:07,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 17:08:07,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:08:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:08:11,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:08:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:08:22,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:08:22,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612614765] [2021-12-06 17:08:22,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612614765] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:08:22,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:08:22,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-12-06 17:08:22,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709030373] [2021-12-06 17:08:22,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:08:22,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:08:22,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:08:22,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:08:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:08:22,103 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:08:37,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 17:08:39,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 17:08:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:08:52,740 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2021-12-06 17:08:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:08:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 87 [2021-12-06 17:08:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:08:52,745 INFO L225 Difference]: With dead ends: 99 [2021-12-06 17:08:52,745 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 17:08:52,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=327, Invalid=3333, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 17:08:52,746 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 90 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:08:52,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1341 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 970 Invalid, 0 Unknown, 3 Unchecked, 15.1s Time] [2021-12-06 17:08:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 17:08:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-06 17:08:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 59 states have internal predecessors, (64), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-06 17:08:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-12-06 17:08:52,759 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 87 [2021-12-06 17:08:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:08:52,759 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-12-06 17:08:52,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:08:52,759 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-12-06 17:08:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:08:52,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:08:52,760 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2021-12-06 17:08:52,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-12-06 17:08:52,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:08:52,961 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:08:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:08:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2122496694, now seen corresponding path program 1 times [2021-12-06 17:08:52,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:08:52,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646427263] [2021-12-06 17:08:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:08:52,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:08:52,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:08:52,962 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:08:52,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-06 17:08:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:08:53,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 17:08:53,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:08:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:08:58,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:09:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:09:11,409 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:09:11,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646427263] [2021-12-06 17:09:11,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646427263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:09:11,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:09:11,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-12-06 17:09:11,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469881526] [2021-12-06 17:09:11,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:09:11,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 17:09:11,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:09:11,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 17:09:11,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:09:11,411 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 43 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 39 states have internal predecessors, (77), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:09:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:09:24,918 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2021-12-06 17:09:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:09:24,918 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 39 states have internal predecessors, (77), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 89 [2021-12-06 17:09:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:09:24,919 INFO L225 Difference]: With dead ends: 84 [2021-12-06 17:09:24,919 INFO L226 Difference]: Without dead ends: 73 [2021-12-06 17:09:24,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=217, Invalid=3089, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:09:24,920 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 41 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:09:24,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1328 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 838 Invalid, 0 Unknown, 2 Unchecked, 6.7s Time] [2021-12-06 17:09:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-06 17:09:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-06 17:09:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.125) internal successors, (63), 58 states have internal predecessors, (63), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-06 17:09:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2021-12-06 17:09:24,931 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 89 [2021-12-06 17:09:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:09:24,932 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2021-12-06 17:09:24,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 39 states have internal predecessors, (77), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:09:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2021-12-06 17:09:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:09:24,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:09:24,933 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2021-12-06 17:09:24,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-12-06 17:09:25,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:09:25,134 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:09:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:09:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash -758343538, now seen corresponding path program 2 times [2021-12-06 17:09:25,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:09:25,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788739433] [2021-12-06 17:09:25,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:09:25,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:09:25,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:09:25,139 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:09:25,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-06 17:09:25,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:09:25,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:09:25,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 17:09:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:09:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:09:29,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:09:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:09:42,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:09:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788739433] [2021-12-06 17:09:42,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788739433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:09:42,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:09:42,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-12-06 17:09:42,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430376722] [2021-12-06 17:09:42,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:09:42,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 17:09:42,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:09:42,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 17:09:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:09:42,939 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 43 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 39 states have internal predecessors, (77), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:09:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:09:54,846 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-12-06 17:09:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:09:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 39 states have internal predecessors, (77), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 89 [2021-12-06 17:09:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:09:54,848 INFO L225 Difference]: With dead ends: 82 [2021-12-06 17:09:54,848 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 17:09:54,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=217, Invalid=3089, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:09:54,849 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 29 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:09:54,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1430 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 795 Invalid, 0 Unknown, 27 Unchecked, 5.4s Time] [2021-12-06 17:09:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 17:09:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-06 17:09:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:09:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-12-06 17:09:54,854 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 89 [2021-12-06 17:09:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:09:54,854 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-12-06 17:09:54,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 39 states have internal predecessors, (77), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 17:09:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-12-06 17:09:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:09:54,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:09:54,855 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:09:54,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-12-06 17:09:55,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:09:55,056 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:09:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:09:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash -735711284, now seen corresponding path program 1 times [2021-12-06 17:09:55,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:09:55,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879994591] [2021-12-06 17:09:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:09:55,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:09:55,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:09:55,059 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:09:55,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-06 17:09:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:09:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 17:09:55,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:10:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 17:10:01,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:10:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 17:10:21,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:10:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879994591] [2021-12-06 17:10:21,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879994591] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:10:21,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:10:21,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 45 [2021-12-06 17:10:21,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886828427] [2021-12-06 17:10:21,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:10:21,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 17:10:21,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:10:21,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 17:10:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 17:10:21,160 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 45 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 41 states have internal predecessors, (72), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-06 17:10:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:31,750 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-06 17:10:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:10:31,750 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 41 states have internal predecessors, (72), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) Word has length 89 [2021-12-06 17:10:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:31,751 INFO L225 Difference]: With dead ends: 60 [2021-12-06 17:10:31,751 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 17:10:31,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=306, Invalid=2664, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 17:10:31,752 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:31,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1094 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 406 Invalid, 0 Unknown, 16 Unchecked, 4.0s Time] [2021-12-06 17:10:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 17:10:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 17:10:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 17:10:31,753 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2021-12-06 17:10:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:31,753 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 17:10:31,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 41 states have internal predecessors, (72), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-06 17:10:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 17:10:31,753 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 17:10:31,755 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 17:10:31,755 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 17:10:31,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-12-06 17:10:31,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece1104a-fcd4-424e-85f4-a09e916376ab/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:10:31,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 17:10:40,398 WARN L227 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 187 DAG size of output: 170 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 17:11:04,367 WARN L227 SmtUtils]: Spent 23.73s on a formula simplification. DAG size of input: 198 DAG size of output: 181 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)