./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/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_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:39:26,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:39:26,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:39:26,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:39:26,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:39:26,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:39:26,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:39:26,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:39:26,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:39:26,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:39:26,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:39:26,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:39:26,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:39:26,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:39:26,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:39:26,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:39:26,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:39:26,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:39:26,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:39:26,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:39:26,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:39:26,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:39:26,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:39:26,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:39:26,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:39:26,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:39:26,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:39:26,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:39:26,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:39:26,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:39:26,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:39:26,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:39:26,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:39:26,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:39:26,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:39:26,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:39:26,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:39:26,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:39:26,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:39:26,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:39:26,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:39:26,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 21:39:26,267 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:39:26,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:39:26,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:39:26,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:39:26,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:39:26,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:39:26,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:39:26,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:39:26,269 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:39:26,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:39:26,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:39:26,269 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 21:39:26,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:39:26,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:39:26,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:39:26,270 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 21:39:26,270 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 21:39:26,270 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 21:39:26,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:39:26,270 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 21:39:26,270 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:39:26,270 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:39:26,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:39:26,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:39:26,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:39:26,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:39:26,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:39:26,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:39:26,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:39:26,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:39:26,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:39:26,272 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_fe9ebdf2-db99-431a-b60c-7f77360ce501/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 [2021-12-06 21:39:26,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:39:26,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:39:26,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:39:26,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:39:26,468 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:39:26,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-12-06 21:39:26,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data/b6f2a5fb7/a672daef26d84f5ab286d7bd10d86b87/FLAG654eeda9f [2021-12-06 21:39:26,974 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:39:26,975 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-12-06 21:39:26,984 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data/b6f2a5fb7/a672daef26d84f5ab286d7bd10d86b87/FLAG654eeda9f [2021-12-06 21:39:26,994 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data/b6f2a5fb7/a672daef26d84f5ab286d7bd10d86b87 [2021-12-06 21:39:26,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:39:26,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:39:26,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:39:26,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:39:27,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:39:27,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:39:26" (1/1) ... [2021-12-06 21:39:27,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155ff001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27, skipping insertion in model container [2021-12-06 21:39:27,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:39:26" (1/1) ... [2021-12-06 21:39:27,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:39:27,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:39:27,226 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_fe9ebdf2-db99-431a-b60c-7f77360ce501/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-12-06 21:39:27,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:39:27,235 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:39:27,264 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_fe9ebdf2-db99-431a-b60c-7f77360ce501/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-12-06 21:39:27,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:39:27,286 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:39:27,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27 WrapperNode [2021-12-06 21:39:27,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:39:27,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:39:27,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:39:27,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:39:27,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,332 INFO L137 Inliner]: procedures = 127, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 141 [2021-12-06 21:39:27,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:39:27,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:39:27,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:39:27,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:39:27,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:39:27,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:39:27,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:39:27,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:39:27,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (1/1) ... [2021-12-06 21:39:27,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:39:27,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:39:27,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:39:27,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:39:27,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-06 21:39:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:39:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:39:27,489 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:39:27,490 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:39:27,747 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:39:27,754 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:39:27,755 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 21:39:27,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:39:27 BoogieIcfgContainer [2021-12-06 21:39:27,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:39:27,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:39:27,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:39:27,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:39:27,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:39:26" (1/3) ... [2021-12-06 21:39:27,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726979e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:39:27, skipping insertion in model container [2021-12-06 21:39:27,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:27" (2/3) ... [2021-12-06 21:39:27,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726979e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:39:27, skipping insertion in model container [2021-12-06 21:39:27,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:39:27" (3/3) ... [2021-12-06 21:39:27,764 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2021-12-06 21:39:27,770 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:39:27,770 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 47 error locations. [2021-12-06 21:39:27,811 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:39:27,816 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 21:39:27,816 INFO L340 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2021-12-06 21:39:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 57 states have (on average 2.087719298245614) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 21:39:27,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:27,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:27,835 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:27,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1815964311, now seen corresponding path program 1 times [2021-12-06 21:39:27,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:27,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117262869] [2021-12-06 21:39:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:27,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:27,975 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 21:39:27,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:27,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117262869] [2021-12-06 21:39:27,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117262869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:27,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:27,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:39:27,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989824053] [2021-12-06 21:39:27,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:27,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:39:27,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:39:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:28,013 INFO L87 Difference]: Start difference. First operand has 108 states, 57 states have (on average 2.087719298245614) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:28,110 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2021-12-06 21:39:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:39:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 21:39:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:28,121 INFO L225 Difference]: With dead ends: 105 [2021-12-06 21:39:28,122 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:39:28,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:28,126 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:28,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 164 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:39:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:39:28,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-06 21:39:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-12-06 21:39:28,165 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 7 [2021-12-06 21:39:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:28,165 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-12-06 21:39:28,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-12-06 21:39:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 21:39:28,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:28,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:28,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:39:28,167 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1815964312, now seen corresponding path program 1 times [2021-12-06 21:39:28,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496048148] [2021-12-06 21:39:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:28,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:28,221 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 21:39:28,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:28,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496048148] [2021-12-06 21:39:28,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496048148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:28,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:28,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:39:28,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290482626] [2021-12-06 21:39:28,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:28,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:39:28,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:39:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:28,224 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:28,295 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2021-12-06 21:39:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:39:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 21:39:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:28,297 INFO L225 Difference]: With dead ends: 99 [2021-12-06 21:39:28,297 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 21:39:28,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:28,299 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:28,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 164 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:39:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 21:39:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-06 21:39:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-12-06 21:39:28,311 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 7 [2021-12-06 21:39:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:28,311 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-12-06 21:39:28,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-12-06 21:39:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:39:28,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:28,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:28,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:39:28,313 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash -418267899, now seen corresponding path program 1 times [2021-12-06 21:39:28,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360119624] [2021-12-06 21:39:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:28,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:28,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:39:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:28,474 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 21:39:28,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:28,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360119624] [2021-12-06 21:39:28,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360119624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:28,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:28,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:39:28,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185208674] [2021-12-06 21:39:28,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:28,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:39:28,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:39:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:39:28,477 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:28,655 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-12-06 21:39:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:39:28,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 21:39:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:28,659 INFO L225 Difference]: With dead ends: 102 [2021-12-06 21:39:28,659 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:39:28,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:39:28,661 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 20 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:28,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 476 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:39:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:39:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-12-06 21:39:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-12-06 21:39:28,672 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 14 [2021-12-06 21:39:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:28,673 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-12-06 21:39:28,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-12-06 21:39:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:39:28,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:28,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:28,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:39:28,675 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash -418267900, now seen corresponding path program 1 times [2021-12-06 21:39:28,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:28,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135916529] [2021-12-06 21:39:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:28,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:28,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:39:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:28,753 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 21:39:28,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:28,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135916529] [2021-12-06 21:39:28,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135916529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:28,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:28,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:39:28,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457748025] [2021-12-06 21:39:28,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:28,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:39:28,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:28,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:39:28,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:39:28,755 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:28,891 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-06 21:39:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:39:28,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 21:39:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:28,892 INFO L225 Difference]: With dead ends: 100 [2021-12-06 21:39:28,892 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 21:39:28,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:39:28,893 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 15 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:28,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 361 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:39:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 21:39:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-12-06 21:39:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-12-06 21:39:28,899 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 14 [2021-12-06 21:39:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:28,899 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-12-06 21:39:28,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-12-06 21:39:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 21:39:28,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:28,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:28,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:39:28,900 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:28,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1186059880, now seen corresponding path program 1 times [2021-12-06 21:39:28,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:28,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569490909] [2021-12-06 21:39:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:28,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 21:39:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:28,939 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 21:39:28,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:28,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569490909] [2021-12-06 21:39:28,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569490909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:28,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:28,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:39:28,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154240694] [2021-12-06 21:39:28,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:28,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:39:28,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:39:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:39:28,941 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:29,003 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2021-12-06 21:39:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:39:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 21:39:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:29,004 INFO L225 Difference]: With dead ends: 105 [2021-12-06 21:39:29,004 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 21:39:29,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:39:29,006 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 9 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:29,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 241 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:39:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 21:39:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2021-12-06 21:39:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-12-06 21:39:29,014 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 16 [2021-12-06 21:39:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:29,015 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-12-06 21:39:29,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-12-06 21:39:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 21:39:29,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:29,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:29,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:39:29,016 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:29,017 INFO L85 PathProgramCache]: Analyzing trace with hash -918895952, now seen corresponding path program 1 times [2021-12-06 21:39:29,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:29,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877697798] [2021-12-06 21:39:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:29,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:39:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,074 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 21:39:29,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:29,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877697798] [2021-12-06 21:39:29,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877697798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:29,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:29,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:39:29,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263495114] [2021-12-06 21:39:29,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:29,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:39:29,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:29,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:39:29,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:39:29,076 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:29,133 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-12-06 21:39:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:39:29,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 21:39:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:29,134 INFO L225 Difference]: With dead ends: 102 [2021-12-06 21:39:29,134 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:39:29,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:39:29,136 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:29,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 237 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:39:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:39:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-12-06 21:39:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.75) internal successors, (105), 96 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-12-06 21:39:29,143 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 17 [2021-12-06 21:39:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:29,144 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-12-06 21:39:29,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-12-06 21:39:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 21:39:29,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:29,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:29,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:39:29,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:29,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1802773707, now seen corresponding path program 1 times [2021-12-06 21:39:29,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:29,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387160403] [2021-12-06 21:39:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:29,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:39:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:39:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:39:29,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:29,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387160403] [2021-12-06 21:39:29,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387160403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:29,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77787668] [2021-12-06 21:39:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:29,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:29,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:39:29,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:39:29,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:39:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 21:39:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:29,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:39:29,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77787668] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:39:29,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:39:29,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-12-06 21:39:29,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845182400] [2021-12-06 21:39:29,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:29,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:39:29,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:39:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:39:29,413 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:39:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:29,478 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2021-12-06 21:39:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:39:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-12-06 21:39:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:29,480 INFO L225 Difference]: With dead ends: 103 [2021-12-06 21:39:29,480 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 21:39:29,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:39:29,481 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 14 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:29,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 428 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:39:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 21:39:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-06 21:39:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 98 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2021-12-06 21:39:29,486 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 31 [2021-12-06 21:39:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:29,486 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2021-12-06 21:39:29,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:39:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2021-12-06 21:39:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:39:29,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:29,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:29,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:39:29,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 21:39:29,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash 916543363, now seen corresponding path program 1 times [2021-12-06 21:39:29,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:29,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078617580] [2021-12-06 21:39:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:29,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:39:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 21:39:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:39:29,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:29,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078617580] [2021-12-06 21:39:29,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078617580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:29,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749896465] [2021-12-06 21:39:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:29,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:29,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:39:29,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:39:29,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:39:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:29,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 21:39:29,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:29,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:30,117 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 21:39:30,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 21:39:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:30,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:30,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749896465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:30,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:39:30,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-12-06 21:39:30,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144315519] [2021-12-06 21:39:30,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:30,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:39:30,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:30,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:39:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:39:30,175 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:39:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:30,357 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2021-12-06 21:39:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:39:30,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-12-06 21:39:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:30,358 INFO L225 Difference]: With dead ends: 114 [2021-12-06 21:39:30,358 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 21:39:30,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:39:30,359 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 172 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:30,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 378 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 376 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2021-12-06 21:39:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 21:39:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2021-12-06 21:39:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 97 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2021-12-06 21:39:30,366 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 32 [2021-12-06 21:39:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:30,366 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2021-12-06 21:39:30,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:39:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2021-12-06 21:39:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:39:30,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:30,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:30,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:39:30,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:30,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:30,571 INFO L85 PathProgramCache]: Analyzing trace with hash 916543364, now seen corresponding path program 1 times [2021-12-06 21:39:30,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:30,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442907550] [2021-12-06 21:39:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:30,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:30,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:39:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:30,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 21:39:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:39:30,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:30,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442907550] [2021-12-06 21:39:30,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442907550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:30,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73919114] [2021-12-06 21:39:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:30,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:39:30,869 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:39:30,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:39:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:30,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 21:39:30,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:30,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:31,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:31,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:39:31,158 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:39:31,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 21:39:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:31,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:31,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73919114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:31,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:39:31,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-12-06 21:39:31,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110368291] [2021-12-06 21:39:31,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:31,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 21:39:31,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 21:39:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:39:31,262 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:39:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:31,571 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-12-06 21:39:31,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:39:31,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-12-06 21:39:31,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:31,572 INFO L225 Difference]: With dead ends: 102 [2021-12-06 21:39:31,572 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:39:31,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-12-06 21:39:31,573 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 108 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:31,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 397 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 508 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2021-12-06 21:39:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:39:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-12-06 21:39:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 96 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-12-06 21:39:31,578 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 32 [2021-12-06 21:39:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:31,578 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-12-06 21:39:31,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:39:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-12-06 21:39:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 21:39:31,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:31,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:31,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:39:31,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:31,781 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:31,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2135424312, now seen corresponding path program 2 times [2021-12-06 21:39:31,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:31,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34188845] [2021-12-06 21:39:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:31,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:31,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:39:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:31,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 21:39:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:31,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-06 21:39:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:39:31,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:31,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34188845] [2021-12-06 21:39:31,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34188845] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:31,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319780759] [2021-12-06 21:39:31,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:39:31,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:39:31,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:39:31,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:39:31,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:39:31,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:39:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 21:39:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:39:32,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:39:32,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319780759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:39:32,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:39:32,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2021-12-06 21:39:32,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865103454] [2021-12-06 21:39:32,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:32,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:39:32,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:39:32,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:39:32,161 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:39:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:32,266 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-12-06 21:39:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:39:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2021-12-06 21:39:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:32,267 INFO L225 Difference]: With dead ends: 101 [2021-12-06 21:39:32,267 INFO L226 Difference]: Without dead ends: 101 [2021-12-06 21:39:32,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:39:32,267 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 170 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:32,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 414 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:39:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-06 21:39:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-06 21:39:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 96 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-12-06 21:39:32,271 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 46 [2021-12-06 21:39:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:32,271 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-12-06 21:39:32,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:39:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-12-06 21:39:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 21:39:32,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:32,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:32,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:39:32,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:32,473 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:32,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash 568631680, now seen corresponding path program 1 times [2021-12-06 21:39:32,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:32,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775106686] [2021-12-06 21:39:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:32,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:32,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:39:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:32,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 21:39:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:32,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 21:39:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:39:32,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775106686] [2021-12-06 21:39:32,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775106686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172760287] [2021-12-06 21:39:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:32,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:32,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:39:32,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:39:32,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:39:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 21:39:32,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:32,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:32,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:39:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:34,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:39:34,905 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:39:34,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:39:34,953 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:39:34,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:39:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 21:39:34,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:35,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172760287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:35,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:39:35,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-12-06 21:39:35,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721259398] [2021-12-06 21:39:35,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:35,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 21:39:35,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:35,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 21:39:35,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=163, Unknown=1, NotChecked=0, Total=210 [2021-12-06 21:39:35,187 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 21:39:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:35,472 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-12-06 21:39:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:39:35,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-12-06 21:39:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:35,473 INFO L225 Difference]: With dead ends: 109 [2021-12-06 21:39:35,474 INFO L226 Difference]: Without dead ends: 109 [2021-12-06 21:39:35,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2021-12-06 21:39:35,475 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 117 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:35,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 399 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2021-12-06 21:39:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-06 21:39:35,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2021-12-06 21:39:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 92 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-12-06 21:39:35,480 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 47 [2021-12-06 21:39:35,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:35,480 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-12-06 21:39:35,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-06 21:39:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-12-06 21:39:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 21:39:35,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:35,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:35,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:39:35,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:35,682 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash 568631681, now seen corresponding path program 1 times [2021-12-06 21:39:35,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:35,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197930090] [2021-12-06 21:39:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:35,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:35,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:39:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:35,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 21:39:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 21:39:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 21:39:35,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:35,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197930090] [2021-12-06 21:39:35,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197930090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:35,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487745310] [2021-12-06 21:39:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:35,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:35,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:39:35,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:39:35,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:39:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:36,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 21:39:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:36,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:36,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:39:36,170 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 87387 column 46: unknown constant v_#length_BEFORE_CALL_4 [2021-12-06 21:39:36,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:39:36,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-06 21:39:36,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016011410] [2021-12-06 21:39:36,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:36,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:39:36,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:39:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:39:36,171 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:39:36,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:39:36,172 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 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 21:39:36,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:39:36,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:39:36,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:36,374 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2233879f at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 21:39:36,377 INFO L158 Benchmark]: Toolchain (without parser) took 9380.22ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 63.0MB in the beginning and 113.9MB in the end (delta: -50.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:39:36,378 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 100.7MB. Free memory was 81.0MB in the beginning and 80.9MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:39:36,378 INFO L158 Benchmark]: CACSL2BoogieTranslator took 288.39ms. Allocated memory is still 100.7MB. Free memory was 62.8MB in the beginning and 69.0MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 21:39:36,379 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.43ms. Allocated memory is still 100.7MB. Free memory was 69.0MB in the beginning and 66.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:39:36,379 INFO L158 Benchmark]: Boogie Preprocessor took 24.34ms. Allocated memory is still 100.7MB. Free memory was 66.9MB in the beginning and 64.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:39:36,379 INFO L158 Benchmark]: RCFGBuilder took 398.94ms. Allocated memory is still 100.7MB. Free memory was 64.8MB in the beginning and 46.3MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-06 21:39:36,380 INFO L158 Benchmark]: TraceAbstraction took 8618.27ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 46.0MB in the beginning and 113.9MB in the end (delta: -67.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:39:36,382 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 100.7MB. Free memory was 81.0MB in the beginning and 80.9MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 288.39ms. Allocated memory is still 100.7MB. Free memory was 62.8MB in the beginning and 69.0MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.43ms. Allocated memory is still 100.7MB. Free memory was 69.0MB in the beginning and 66.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.34ms. Allocated memory is still 100.7MB. Free memory was 66.9MB in the beginning and 64.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 398.94ms. Allocated memory is still 100.7MB. Free memory was 64.8MB in the beginning and 46.3MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 8618.27ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 46.0MB in the beginning and 113.9MB in the end (delta: -67.9MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2233879f de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2233879f: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-06 21:39:36,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 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_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/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_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:39:37,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:39:37,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:39:37,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:39:37,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:39:37,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:39:37,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:39:37,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:39:37,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:39:37,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:39:37,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:39:37,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:39:37,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:39:37,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:39:37,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:39:37,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:39:37,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:39:37,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:39:37,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:39:37,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:39:37,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:39:37,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:39:37,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:39:37,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:39:37,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:39:37,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:39:37,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:39:37,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:39:37,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:39:37,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:39:37,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:39:37,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:39:37,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:39:37,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:39:37,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:39:37,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:39:37,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:39:37,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:39:37,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:39:37,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:39:37,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:39:37,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 21:39:37,989 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:39:37,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:39:37,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:39:37,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:39:37,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:39:37,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:39:37,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:39:37,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:39:37,992 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:39:37,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:39:37,992 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:39:37,992 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 21:39:37,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:39:37,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:39:37,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:39:37,993 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 21:39:37,993 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 21:39:37,993 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 21:39:37,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:39:37,994 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 21:39:37,994 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 21:39:37,994 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 21:39:37,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:39:37,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:39:37,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:39:37,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:39:37,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:39:37,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:39:37,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:39:37,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:39:37,995 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 21:39:37,995 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 21:39:37,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:39:37,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 21:39:37,996 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_fe9ebdf2-db99-431a-b60c-7f77360ce501/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 [2021-12-06 21:39:38,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:39:38,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:39:38,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:39:38,264 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:39:38,265 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:39:38,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-12-06 21:39:38,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data/df83feb45/37b9327350d74f75a179e323e5eeaf48/FLAGe4923906a [2021-12-06 21:39:38,730 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:39:38,730 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-12-06 21:39:38,740 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data/df83feb45/37b9327350d74f75a179e323e5eeaf48/FLAGe4923906a [2021-12-06 21:39:38,753 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/data/df83feb45/37b9327350d74f75a179e323e5eeaf48 [2021-12-06 21:39:38,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:39:38,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:39:38,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:39:38,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:39:38,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:39:38,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:39:38" (1/1) ... [2021-12-06 21:39:38,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a871a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:38, skipping insertion in model container [2021-12-06 21:39:38,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:39:38" (1/1) ... [2021-12-06 21:39:38,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:39:38,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:39:39,020 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_fe9ebdf2-db99-431a-b60c-7f77360ce501/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-12-06 21:39:39,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:39:39,030 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:39:39,060 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_fe9ebdf2-db99-431a-b60c-7f77360ce501/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-12-06 21:39:39,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:39:39,084 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:39:39,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39 WrapperNode [2021-12-06 21:39:39,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:39:39,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:39:39,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:39:39,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:39:39,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,122 INFO L137 Inliner]: procedures = 130, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 142 [2021-12-06 21:39:39,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:39:39,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:39:39,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:39:39,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:39:39,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:39:39,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:39:39,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:39:39,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:39:39,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (1/1) ... [2021-12-06 21:39:39,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:39:39,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:39:39,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:39:39,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:39:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 21:39:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-06 21:39:39,211 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-06 21:39:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:39:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:39:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 21:39:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 21:39:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 21:39:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:39:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 21:39:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 21:39:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 21:39:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:39:39,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:39:39,299 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:39:39,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:39:39,693 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:39:39,699 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:39:39,699 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 21:39:39,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:39:39 BoogieIcfgContainer [2021-12-06 21:39:39,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:39:39,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:39:39,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:39:39,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:39:39,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:39:38" (1/3) ... [2021-12-06 21:39:39,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13644c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:39:39, skipping insertion in model container [2021-12-06 21:39:39,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:39:39" (2/3) ... [2021-12-06 21:39:39,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13644c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:39:39, skipping insertion in model container [2021-12-06 21:39:39,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:39:39" (3/3) ... [2021-12-06 21:39:39,707 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2021-12-06 21:39:39,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:39:39,711 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 47 error locations. [2021-12-06 21:39:39,743 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:39:39,748 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 21:39:39,748 INFO L340 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2021-12-06 21:39:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 57 states have (on average 2.087719298245614) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 21:39:39,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:39,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:39,767 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1815964311, now seen corresponding path program 1 times [2021-12-06 21:39:39,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:39,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992395233] [2021-12-06 21:39:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:39,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:39,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:39,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:39,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 21:39:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:39:39,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:39,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:39,925 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 21:39:39,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:39:39,926 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:39,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992395233] [2021-12-06 21:39:39,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992395233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:39,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:39,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:39:39,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342389480] [2021-12-06 21:39:39,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:39,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:39:39,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:39,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:39:39,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:39,953 INFO L87 Difference]: Start difference. First operand has 108 states, 57 states have (on average 2.087719298245614) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:40,129 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2021-12-06 21:39:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:39:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 21:39:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:40,138 INFO L225 Difference]: With dead ends: 105 [2021-12-06 21:39:40,138 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:39:40,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:40,142 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:40,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 164 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:39:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:39:40,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-06 21:39:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-12-06 21:39:40,174 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 7 [2021-12-06 21:39:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:40,174 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-12-06 21:39:40,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-12-06 21:39:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 21:39:40,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:40,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:40,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:39:40,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:39:40,376 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:40,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1815964312, now seen corresponding path program 1 times [2021-12-06 21:39:40,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:40,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554370504] [2021-12-06 21:39:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:40,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:40,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:40,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:40,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 21:39:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:39:40,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:40,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:40,546 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 21:39:40,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:39:40,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554370504] [2021-12-06 21:39:40,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554370504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:40,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:40,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:39:40,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343046880] [2021-12-06 21:39:40,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:40,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:39:40,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:39:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:40,549 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:40,748 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2021-12-06 21:39:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:39:40,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 21:39:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:40,750 INFO L225 Difference]: With dead ends: 99 [2021-12-06 21:39:40,750 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 21:39:40,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:40,752 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:40,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 164 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:39:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 21:39:40,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-06 21:39:40,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-12-06 21:39:40,763 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 7 [2021-12-06 21:39:40,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:40,764 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-12-06 21:39:40,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:40,764 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-12-06 21:39:40,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:39:40,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:40,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:40,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 21:39:40,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:39:40,967 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:40,969 INFO L85 PathProgramCache]: Analyzing trace with hash -418267899, now seen corresponding path program 1 times [2021-12-06 21:39:40,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:40,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727225852] [2021-12-06 21:39:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:40,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:40,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:40,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:40,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 21:39:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 21:39:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:41,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:41,281 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 21:39:41,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:39:41,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:41,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727225852] [2021-12-06 21:39:41,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727225852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:41,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:41,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:39:41,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171871200] [2021-12-06 21:39:41,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:41,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:39:41,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:39:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:39:41,284 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:41,661 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-12-06 21:39:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:39:41,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 21:39:41,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:41,663 INFO L225 Difference]: With dead ends: 102 [2021-12-06 21:39:41,663 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:39:41,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:39:41,664 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 16 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:41,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 340 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 21:39:41,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:39:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-12-06 21:39:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-12-06 21:39:41,672 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 14 [2021-12-06 21:39:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:41,672 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-12-06 21:39:41,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-12-06 21:39:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:39:41,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:41,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:41,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 21:39:41,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:39:41,875 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash -418267900, now seen corresponding path program 1 times [2021-12-06 21:39:41,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:41,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941726382] [2021-12-06 21:39:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:41,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:41,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:41,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:41,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 21:39:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:41,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:39:41,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:41,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:42,031 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 21:39:42,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:39:42,031 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:42,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941726382] [2021-12-06 21:39:42,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941726382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:42,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:42,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:39:42,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245138360] [2021-12-06 21:39:42,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:42,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:39:42,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:42,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:39:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:39:42,033 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:42,333 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-06 21:39:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:39:42,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 21:39:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:42,334 INFO L225 Difference]: With dead ends: 100 [2021-12-06 21:39:42,334 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 21:39:42,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:39:42,335 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 14 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:42,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 324 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:39:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 21:39:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-12-06 21:39:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-12-06 21:39:42,341 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 14 [2021-12-06 21:39:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:42,341 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-12-06 21:39:42,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-12-06 21:39:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 21:39:42,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:42,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:42,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 21:39:42,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:39:42,544 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1186059880, now seen corresponding path program 1 times [2021-12-06 21:39:42,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:42,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604000044] [2021-12-06 21:39:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:42,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:42,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:42,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:42,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 21:39:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:42,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:39:42,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:42,628 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 21:39:42,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:39:42,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604000044] [2021-12-06 21:39:42,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604000044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:42,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:42,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:39:42,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940987570] [2021-12-06 21:39:42,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:42,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:39:42,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:39:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:42,630 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:42,636 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2021-12-06 21:39:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:39:42,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 21:39:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:42,637 INFO L225 Difference]: With dead ends: 105 [2021-12-06 21:39:42,637 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 21:39:42,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:42,638 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 9 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:42,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 203 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:39:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 21:39:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2021-12-06 21:39:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-12-06 21:39:42,646 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 16 [2021-12-06 21:39:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:42,646 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-12-06 21:39:42,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-12-06 21:39:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 21:39:42,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:42,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:42,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 21:39:42,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:39:42,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash -918895952, now seen corresponding path program 1 times [2021-12-06 21:39:42,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:42,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559047794] [2021-12-06 21:39:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:42,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:42,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:42,855 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:42,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 21:39:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:42,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:39:42,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:43,006 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 21:39:43,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:39:43,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:43,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559047794] [2021-12-06 21:39:43,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559047794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:43,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:43,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:39:43,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900301369] [2021-12-06 21:39:43,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:43,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:39:43,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:39:43,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:43,008 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:43,034 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-12-06 21:39:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:39:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 21:39:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:43,036 INFO L225 Difference]: With dead ends: 102 [2021-12-06 21:39:43,036 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:39:43,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:43,037 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:43,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 198 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:39:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:39:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-12-06 21:39:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.75) internal successors, (105), 96 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-12-06 21:39:43,042 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 17 [2021-12-06 21:39:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:43,042 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-12-06 21:39:43,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:39:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-12-06 21:39:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 21:39:43,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:43,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:43,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 21:39:43,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:39:43,245 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1802773707, now seen corresponding path program 1 times [2021-12-06 21:39:43,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:43,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986547701] [2021-12-06 21:39:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:43,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:43,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:43,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:43,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 21:39:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 21:39:43,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:43,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:39:43,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:43,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986547701] [2021-12-06 21:39:43,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986547701] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:39:43,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:39:43,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 21:39:43,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773078313] [2021-12-06 21:39:43,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:43,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:39:43,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:43,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:39:43,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:39:43,464 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:39:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:43,486 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2021-12-06 21:39:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:39:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-12-06 21:39:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:43,487 INFO L225 Difference]: With dead ends: 112 [2021-12-06 21:39:43,487 INFO L226 Difference]: Without dead ends: 112 [2021-12-06 21:39:43,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:39:43,488 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 22 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:43,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 501 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:39:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-06 21:39:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-12-06 21:39:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 98 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2021-12-06 21:39:43,493 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 31 [2021-12-06 21:39:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:43,493 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2021-12-06 21:39:43,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:39:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2021-12-06 21:39:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:39:43,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:43,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:43,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-06 21:39:43,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:39:43,695 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash 916543363, now seen corresponding path program 1 times [2021-12-06 21:39:43,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:43,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238183014] [2021-12-06 21:39:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:43,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:43,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:43,697 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:43,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 21:39:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:43,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 21:39:43,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:43,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:44,036 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 21:39:44,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2021-12-06 21:39:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:44,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:44,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238183014] [2021-12-06 21:39:44,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238183014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:39:44,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:39:44,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-12-06 21:39:44,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049426903] [2021-12-06 21:39:44,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:39:44,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:39:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:39:44,302 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:39:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:44,719 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-12-06 21:39:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:39:44,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-12-06 21:39:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:44,720 INFO L225 Difference]: With dead ends: 102 [2021-12-06 21:39:44,720 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:39:44,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:39:44,721 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 14 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:44,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 435 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2021-12-06 21:39:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:39:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-06 21:39:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 97 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2021-12-06 21:39:44,725 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 32 [2021-12-06 21:39:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:44,725 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2021-12-06 21:39:44,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:39:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2021-12-06 21:39:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:39:44,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:44,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:44,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 21:39:44,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:39:44,928 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:44,929 INFO L85 PathProgramCache]: Analyzing trace with hash 916543364, now seen corresponding path program 1 times [2021-12-06 21:39:44,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:44,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848058887] [2021-12-06 21:39:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:44,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:44,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:44,933 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:44,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 21:39:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:45,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 21:39:45,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:45,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:47,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:39:47,332 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:39:47,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 21:39:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:47,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:47,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:47,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848058887] [2021-12-06 21:39:47,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848058887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:47,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2095655948] [2021-12-06 21:39:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:47,640 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:39:47,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:39:47,641 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:39:47,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-12-06 21:39:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:47,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 21:39:47,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:47,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:47,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:50,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:50,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:39:50,108 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:39:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 21:39:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:50,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:52,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2095655948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:52,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:39:52,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-12-06 21:39:52,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506139806] [2021-12-06 21:39:52,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:52,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:39:52,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:52,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:39:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=106, Unknown=1, NotChecked=0, Total=132 [2021-12-06 21:39:52,378 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:53,182 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-12-06 21:39:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:39:53,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-12-06 21:39:53,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:53,183 INFO L225 Difference]: With dead ends: 102 [2021-12-06 21:39:53,183 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:39:53,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=51, Invalid=220, Unknown=1, NotChecked=0, Total=272 [2021-12-06 21:39:53,184 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 12 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:53,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 400 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 435 Invalid, 0 Unknown, 62 Unchecked, 0.7s Time] [2021-12-06 21:39:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:39:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-12-06 21:39:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 96 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-12-06 21:39:53,187 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 32 [2021-12-06 21:39:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:53,188 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-12-06 21:39:53,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:39:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-12-06 21:39:53,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 21:39:53,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:53,189 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:53,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 21:39:53,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-12-06 21:39:53,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:39:53,592 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:53,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2135424312, now seen corresponding path program 2 times [2021-12-06 21:39:53,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:53,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110524649] [2021-12-06 21:39:53,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:39:53,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:53,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:53,598 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:53,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 21:39:53,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:39:53,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:39:53,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:39:53,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:39:53,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:39:53,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:53,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110524649] [2021-12-06 21:39:53,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110524649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:39:53,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:39:53,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-12-06 21:39:53,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549479393] [2021-12-06 21:39:53,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:53,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:39:53,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:39:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:39:53,864 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:39:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:54,057 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-12-06 21:39:54,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:39:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2021-12-06 21:39:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:54,058 INFO L225 Difference]: With dead ends: 101 [2021-12-06 21:39:54,058 INFO L226 Difference]: Without dead ends: 101 [2021-12-06 21:39:54,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:39:54,059 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 170 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:54,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 382 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:39:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-06 21:39:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-06 21:39:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 96 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-12-06 21:39:54,064 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 46 [2021-12-06 21:39:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-12-06 21:39:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:39:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-12-06 21:39:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 21:39:54,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:54,066 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:54,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 21:39:54,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:39:54,267 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:39:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash 568631680, now seen corresponding path program 1 times [2021-12-06 21:39:54,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:39:54,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077758040] [2021-12-06 21:39:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:54,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:39:54,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:39:54,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:39:54,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 21:39:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:54,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 21:39:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:54,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:39:54,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 21:39:54,662 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:39:54,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-12-06 21:39:54,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:39:54,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:54,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:39:55,101 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 21:39:55,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-06 21:39:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:39:55,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:55,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:39:55,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077758040] [2021-12-06 21:39:55,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077758040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:55,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [588994351] [2021-12-06 21:39:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:55,424 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:39:55,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:39:55,424 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:39:55,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-06 21:39:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:55,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 21:39:55,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:39:55,807 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 21:39:55,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-06 21:39:55,857 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:39:55,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2021-12-06 21:39:55,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:55,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:55,961 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 21:39:55,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 35 [2021-12-06 21:39:56,123 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:39:56,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 21:39:56,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:56,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:56,300 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 21:39:56,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 44 [2021-12-06 21:39:56,561 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:39:56,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-12-06 21:39:56,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:39:56,717 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 21:39:56,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2021-12-06 21:39:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 21:39:57,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:39:57,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [588994351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:57,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:39:57,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-12-06 21:39:57,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268868650] [2021-12-06 21:39:57,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:39:57,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 21:39:57,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:39:57,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 21:39:57,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:39:57,238 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:39:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:59,678 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-12-06 21:39:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:39:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2021-12-06 21:39:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:59,679 INFO L225 Difference]: With dead ends: 103 [2021-12-06 21:39:59,679 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 21:39:59,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-12-06 21:39:59,680 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 11 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:59,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 538 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 221 Unchecked, 0.3s Time] [2021-12-06 21:39:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 21:39:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-12-06 21:39:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 95 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:39:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2021-12-06 21:39:59,684 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 47 [2021-12-06 21:39:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:59,684 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2021-12-06 21:39:59,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:39:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2021-12-06 21:39:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 21:39:59,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:59,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:59,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-12-06 21:39:59,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 21:40:00,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:40:00,087 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:00,088 INFO L85 PathProgramCache]: Analyzing trace with hash 568631681, now seen corresponding path program 1 times [2021-12-06 21:40:00,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:00,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589042763] [2021-12-06 21:40:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:00,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:00,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:00,090 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:00,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 21:40:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 21:40:00,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:00,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:00,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:00,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:40:00,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-06 21:40:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:02,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:40:02,539 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:40:02,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 21:40:02,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:40:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:04,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:40:05,047 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:40:05,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 21:40:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:05,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:05,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589042763] [2021-12-06 21:40:05,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589042763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952967540] [2021-12-06 21:40:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:05,403 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:40:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:40:05,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:40:05,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-06 21:40:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:05,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 21:40:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:05,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:05,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:40:05,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:05,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:40:06,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:40:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:08,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:40:08,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:40:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:08,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:40:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 21:40:08,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:40:08,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [952967540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:08,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:40:08,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 15 [2021-12-06 21:40:08,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308334432] [2021-12-06 21:40:08,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:08,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:40:08,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:08,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:40:08,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=253, Unknown=3, NotChecked=0, Total=306 [2021-12-06 21:40:08,548 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:08,885 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2021-12-06 21:40:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:40:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-12-06 21:40:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:08,887 INFO L225 Difference]: With dead ends: 100 [2021-12-06 21:40:08,887 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 21:40:08,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=59, Invalid=280, Unknown=3, NotChecked=0, Total=342 [2021-12-06 21:40:08,888 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 10 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:08,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 347 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2021-12-06 21:40:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 21:40:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-12-06 21:40:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 94 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-12-06 21:40:08,891 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 47 [2021-12-06 21:40:08,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:08,891 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-12-06 21:40:08,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:08,891 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-12-06 21:40:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 21:40:08,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:08,892 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:08,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-12-06 21:40:09,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 21:40:09,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:40:09,293 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash 994198465, now seen corresponding path program 1 times [2021-12-06 21:40:09,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:09,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540836089] [2021-12-06 21:40:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:09,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:09,298 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:09,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 21:40:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:09,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:40:09,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:40:09,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:40:09,518 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:09,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540836089] [2021-12-06 21:40:09,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540836089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:09,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:09,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:40:09,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825653566] [2021-12-06 21:40:09,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:09,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:40:09,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:09,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:40:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:40:09,519 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:40:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:09,658 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-12-06 21:40:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:40:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-12-06 21:40:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:09,659 INFO L225 Difference]: With dead ends: 109 [2021-12-06 21:40:09,660 INFO L226 Difference]: Without dead ends: 109 [2021-12-06 21:40:09,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:40:09,660 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 68 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:09,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 90 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-06 21:40:09,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2021-12-06 21:40:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 92 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-12-06 21:40:09,663 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 49 [2021-12-06 21:40:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:09,663 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-12-06 21:40:09,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:40:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-12-06 21:40:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 21:40:09,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:09,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:09,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 21:40:09,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:40:09,866 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:09,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash 994198466, now seen corresponding path program 1 times [2021-12-06 21:40:09,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:09,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617598645] [2021-12-06 21:40:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:09,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:09,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:09,871 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:09,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 21:40:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:10,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 21:40:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:40:10,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:40:10,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:10,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617598645] [2021-12-06 21:40:10,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617598645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:10,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:10,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:40:10,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662505903] [2021-12-06 21:40:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:10,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:40:10,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:40:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:40:10,124 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:10,316 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2021-12-06 21:40:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:40:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-12-06 21:40:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:10,317 INFO L225 Difference]: With dead ends: 95 [2021-12-06 21:40:10,317 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 21:40:10,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:40:10,318 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 142 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:10,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 115 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:40:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 21:40:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-06 21:40:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.5806451612903225) internal successors, (98), 90 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-12-06 21:40:10,321 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 49 [2021-12-06 21:40:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:10,321 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-12-06 21:40:10,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-12-06 21:40:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 21:40:10,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:10,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:10,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 21:40:10,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:40:10,523 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1941985862, now seen corresponding path program 1 times [2021-12-06 21:40:10,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:10,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192790456] [2021-12-06 21:40:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:10,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:10,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:10,528 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:10,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 21:40:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:11,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 21:40:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:11,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:11,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:11,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-06 21:40:11,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:11,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-06 21:40:11,662 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 21:40:11,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 44 [2021-12-06 21:40:11,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-06 21:40:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:12,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:12,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:12,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192790456] [2021-12-06 21:40:12,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192790456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:12,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [343192394] [2021-12-06 21:40:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:12,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:40:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:40:12,266 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:40:12,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-06 21:40:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 21:40:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:12,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:13,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-06 21:40:13,470 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 21:40:13,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 41 [2021-12-06 21:40:13,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:13,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 32 [2021-12-06 21:40:13,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-06 21:40:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:13,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:13,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [343192394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:13,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:40:13,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-12-06 21:40:13,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861047686] [2021-12-06 21:40:13,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:13,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 21:40:13,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:13,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 21:40:13,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=704, Unknown=5, NotChecked=0, Total=812 [2021-12-06 21:40:13,963 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 27 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:40:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:15,381 INFO L93 Difference]: Finished difference Result 150 states and 165 transitions. [2021-12-06 21:40:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 21:40:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2021-12-06 21:40:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:15,382 INFO L225 Difference]: With dead ends: 150 [2021-12-06 21:40:15,382 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 21:40:15,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 78 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=163, Invalid=1088, Unknown=9, NotChecked=0, Total=1260 [2021-12-06 21:40:15,383 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 82 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:15,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1056 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 707 Invalid, 0 Unknown, 207 Unchecked, 1.1s Time] [2021-12-06 21:40:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 21:40:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 99. [2021-12-06 21:40:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.606060606060606) internal successors, (106), 94 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2021-12-06 21:40:15,386 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 51 [2021-12-06 21:40:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:15,386 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2021-12-06 21:40:15,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:40:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2021-12-06 21:40:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 21:40:15,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:15,387 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:15,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-12-06 21:40:15,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 21:40:15,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:40:15,789 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:15,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1941985863, now seen corresponding path program 1 times [2021-12-06 21:40:15,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:15,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744205076] [2021-12-06 21:40:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:15,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:15,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:15,793 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:15,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 21:40:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 21:40:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:16,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:16,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:16,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:16,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-06 21:40:16,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:40:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:16,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:40:16,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:16,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-12-06 21:40:16,961 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 21:40:16,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 21:40:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:16,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:40:17,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 21:40:17,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:40:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:17,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:19,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:19,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744205076] [2021-12-06 21:40:19,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744205076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:19,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [878443502] [2021-12-06 21:40:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:19,941 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:40:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:40:19,942 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:40:19,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-12-06 21:40:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:20,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 21:40:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:20,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:20,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:21,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-12-06 21:40:21,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:40:21,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:21,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:40:21,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:21,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 21:40:21,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:21,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:40:21,545 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 21:40:21,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-12-06 21:40:21,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 21:40:21,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:40:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:22,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [878443502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:22,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:40:22,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-12-06 21:40:22,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687842561] [2021-12-06 21:40:22,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:22,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 21:40:22,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:22,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 21:40:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=760, Unknown=5, NotChecked=0, Total=870 [2021-12-06 21:40:22,324 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:40:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:23,581 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2021-12-06 21:40:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 21:40:23,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2021-12-06 21:40:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:23,583 INFO L225 Difference]: With dead ends: 149 [2021-12-06 21:40:23,583 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 21:40:23,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=166, Invalid=1157, Unknown=9, NotChecked=0, Total=1332 [2021-12-06 21:40:23,584 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 90 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:23,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 606 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 322 Invalid, 0 Unknown, 86 Unchecked, 0.7s Time] [2021-12-06 21:40:23,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 21:40:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2021-12-06 21:40:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 94 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-12-06 21:40:23,587 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 51 [2021-12-06 21:40:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:23,587 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-12-06 21:40:23,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:40:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-12-06 21:40:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 21:40:23,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:23,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:23,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 21:40:23,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-12-06 21:40:23,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:40:23,989 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1941832962, now seen corresponding path program 1 times [2021-12-06 21:40:23,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:23,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622705936] [2021-12-06 21:40:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:23,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:23,993 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:23,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 21:40:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:24,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:40:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:40:24,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:40:24,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:24,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622705936] [2021-12-06 21:40:24,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622705936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:24,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:24,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:40:24,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382045182] [2021-12-06 21:40:24,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:24,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:40:24,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:24,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:40:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:40:24,240 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:24,383 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2021-12-06 21:40:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:40:24,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-06 21:40:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:24,384 INFO L225 Difference]: With dead ends: 109 [2021-12-06 21:40:24,384 INFO L226 Difference]: Without dead ends: 109 [2021-12-06 21:40:24,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:40:24,384 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 141 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:24,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 108 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-06 21:40:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2021-12-06 21:40:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 92 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2021-12-06 21:40:24,387 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 51 [2021-12-06 21:40:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:24,387 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2021-12-06 21:40:24,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2021-12-06 21:40:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 21:40:24,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:24,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:24,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 21:40:24,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:40:24,589 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1941832963, now seen corresponding path program 1 times [2021-12-06 21:40:24,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:24,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54747673] [2021-12-06 21:40:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:24,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:24,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:24,591 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:24,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 21:40:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 21:40:24,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:40:24,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:40:24,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:24,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54747673] [2021-12-06 21:40:24,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54747673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:24,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:24,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:40:24,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040847810] [2021-12-06 21:40:24,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:24,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:40:24,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:40:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:40:24,859 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:25,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:25,042 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2021-12-06 21:40:25,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:40:25,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-06 21:40:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:25,043 INFO L225 Difference]: With dead ends: 95 [2021-12-06 21:40:25,043 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 21:40:25,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:40:25,044 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 133 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:25,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 100 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:40:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 21:40:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-06 21:40:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.5) internal successors, (99), 90 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-12-06 21:40:25,047 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 51 [2021-12-06 21:40:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:25,047 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-12-06 21:40:25,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-12-06 21:40:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 21:40:25,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:25,048 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:25,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 21:40:25,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:40:25,249 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2085671715, now seen corresponding path program 1 times [2021-12-06 21:40:25,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:25,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23024255] [2021-12-06 21:40:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:25,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:25,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:25,254 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:25,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 21:40:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:25,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:40:25,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:25,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:25,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:40:25,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-06 21:40:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 21:40:25,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:40:25,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:25,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23024255] [2021-12-06 21:40:25,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23024255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:25,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:25,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 21:40:25,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140948059] [2021-12-06 21:40:25,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:25,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:40:25,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:40:25,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:40:25,582 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 10 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:26,303 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2021-12-06 21:40:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:40:26,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2021-12-06 21:40:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:26,304 INFO L225 Difference]: With dead ends: 143 [2021-12-06 21:40:26,305 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 21:40:26,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:40:26,305 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 321 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:26,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 313 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 21:40:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 21:40:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2021-12-06 21:40:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.4366197183098592) internal successors, (102), 91 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2021-12-06 21:40:26,308 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 53 [2021-12-06 21:40:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2021-12-06 21:40:26,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2021-12-06 21:40:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 21:40:26,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:26,309 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:26,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-06 21:40:26,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:40:26,510 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:26,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:26,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2085671716, now seen corresponding path program 1 times [2021-12-06 21:40:26,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:26,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725878634] [2021-12-06 21:40:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:26,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:26,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:26,514 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:26,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 21:40:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 21:40:26,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:26,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:40:26,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:40:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:40:26,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-06 21:40:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 21:40:26,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:40:26,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:26,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725878634] [2021-12-06 21:40:26,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725878634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:26,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:26,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 21:40:26,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910952222] [2021-12-06 21:40:26,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:26,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:40:26,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:40:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:40:26,926 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 10 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:27,697 INFO L93 Difference]: Finished difference Result 153 states and 172 transitions. [2021-12-06 21:40:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:40:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2021-12-06 21:40:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:27,698 INFO L225 Difference]: With dead ends: 153 [2021-12-06 21:40:27,698 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 21:40:27,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:40:27,699 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 192 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:27,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 368 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:40:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 21:40:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 102. [2021-12-06 21:40:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 78 states have (on average 1.4102564102564104) internal successors, (110), 97 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2021-12-06 21:40:27,702 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 53 [2021-12-06 21:40:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:27,702 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2021-12-06 21:40:27,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:40:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2021-12-06 21:40:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 21:40:27,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:27,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:27,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-06 21:40:27,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:40:27,904 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1947352068, now seen corresponding path program 1 times [2021-12-06 21:40:27,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:27,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052681769] [2021-12-06 21:40:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:27,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:27,909 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:27,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 21:40:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:28,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 21:40:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:28,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:28,566 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:40:28,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 21:40:28,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:40:28,789 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:40:28,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2021-12-06 21:40:28,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 21:40:29,129 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 21:40:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 39 [2021-12-06 21:40:29,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-12-06 21:40:29,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:40:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:29,700 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 21:40:29,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 54 [2021-12-06 21:40:29,780 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-12-06 21:40:29,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 74 [2021-12-06 21:40:29,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:29,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:40:30,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:40:31,196 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 21:40:31,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 48 [2021-12-06 21:40:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:32,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:32,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:32,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052681769] [2021-12-06 21:40:32,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052681769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:32,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [671022190] [2021-12-06 21:40:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:32,920 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:40:32,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:40:32,921 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:40:32,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-06 21:40:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 21:40:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:33,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:33,924 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:40:33,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 21:40:34,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:40:34,383 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:40:34,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 56 [2021-12-06 21:40:35,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:40:35,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 30 [2021-12-06 21:40:35,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:40:35,763 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-12-06 21:40:35,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 74 [2021-12-06 21:40:35,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:35,793 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 21:40:35,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-12-06 21:40:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:35,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:40:36,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:40:37,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:40:37,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 51 [2021-12-06 21:40:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:38,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:38,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [671022190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:38,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:40:38,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 46 [2021-12-06 21:40:38,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091117525] [2021-12-06 21:40:38,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:38,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 21:40:38,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 21:40:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2604, Unknown=16, NotChecked=0, Total=2862 [2021-12-06 21:40:38,783 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 47 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:40:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:40,712 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2021-12-06 21:40:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 21:40:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2021-12-06 21:40:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:40,714 INFO L225 Difference]: With dead ends: 105 [2021-12-06 21:40:40,714 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 21:40:40,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=348, Invalid=3663, Unknown=21, NotChecked=0, Total=4032 [2021-12-06 21:40:40,716 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 43 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:40,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 950 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 284 Invalid, 0 Unknown, 459 Unchecked, 0.7s Time] [2021-12-06 21:40:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 21:40:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-12-06 21:40:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.4125) internal successors, (113), 99 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:40:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-12-06 21:40:40,719 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 55 [2021-12-06 21:40:40,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:40,719 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-12-06 21:40:40,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:40:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-12-06 21:40:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 21:40:40,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:40,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:40,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-06 21:40:40,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-12-06 21:40:41,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:40:41,122 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:41,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:41,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1947352067, now seen corresponding path program 1 times [2021-12-06 21:40:41,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:41,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743712737] [2021-12-06 21:40:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:41,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:41,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:41,127 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:41,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 21:40:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:41,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 21:40:41,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:41,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:41,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:41,964 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:40:41,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 21:40:41,992 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:40:41,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 21:40:42,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:40:42,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:40:42,380 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:40:42,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 72 [2021-12-06 21:40:42,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 21:40:42,833 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 21:40:42,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 50 [2021-12-06 21:40:42,846 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 21:40:42,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:40:42,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-06 21:40:42,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:40:43,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:43,391 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 21:40:43,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 21:40:43,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:43,435 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 21:40:43,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 73 [2021-12-06 21:40:43,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:43,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 21:40:43,482 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 21:40:43,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 45 [2021-12-06 21:40:44,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:40:44,878 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-12-06 21:40:44,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 56 [2021-12-06 21:40:44,903 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-12-06 21:40:44,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2021-12-06 21:40:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:45,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:46,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743712737] [2021-12-06 21:40:46,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743712737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1174227165] [2021-12-06 21:40:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:46,443 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:40:46,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:40:46,444 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:40:46,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-06 21:40:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:46,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 21:40:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:47,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:47,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:47,771 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:40:47,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 21:40:47,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:40:48,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:40:48,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:40:48,595 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:40:48,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 72 [2021-12-06 21:40:48,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 21:40:49,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:40:49,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 43 [2021-12-06 21:40:49,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:40:49,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:40:49,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:50,002 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 21:40:50,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 21:40:50,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:50,035 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 21:40:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 74 [2021-12-06 21:40:50,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:50,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 21:40:50,078 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 21:40:50,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2021-12-06 21:40:51,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:51,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:40:51,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:40:51,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2021-12-06 21:40:51,414 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-12-06 21:40:51,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2021-12-06 21:40:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:51,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:54,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1174227165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:54,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:40:54,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2021-12-06 21:40:54,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321958266] [2021-12-06 21:40:54,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:54,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 21:40:54,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:40:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 21:40:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2065, Unknown=3, NotChecked=0, Total=2256 [2021-12-06 21:40:54,127 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 42 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:40:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:56,933 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2021-12-06 21:40:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 21:40:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2021-12-06 21:40:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:56,935 INFO L225 Difference]: With dead ends: 187 [2021-12-06 21:40:56,935 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 21:40:56,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=295, Invalid=3120, Unknown=7, NotChecked=0, Total=3422 [2021-12-06 21:40:56,937 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 78 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 399 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:56,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 952 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 515 Invalid, 0 Unknown, 399 Unchecked, 1.1s Time] [2021-12-06 21:40:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 21:40:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 137. [2021-12-06 21:40:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 129 states have internal predecessors, (148), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:40:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2021-12-06 21:40:56,941 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 55 [2021-12-06 21:40:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:56,941 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2021-12-06 21:40:56,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:40:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2021-12-06 21:40:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 21:40:56,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:56,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:56,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-06 21:40:57,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-12-06 21:40:57,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:40:57,344 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:40:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1045714181, now seen corresponding path program 1 times [2021-12-06 21:40:57,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:40:57,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528719352] [2021-12-06 21:40:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:57,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:40:57,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:40:57,346 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:40:57,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 21:40:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:57,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 21:40:57,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:57,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:40:57,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 21:40:58,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:58,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:40:58,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 21:40:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:58,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:58,574 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:40:58,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528719352] [2021-12-06 21:40:58,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528719352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:58,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1402190400] [2021-12-06 21:40:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:58,575 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:40:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:40:58,576 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:40:58,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-12-06 21:40:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 21:40:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:59,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 21:40:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:59,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:40:59,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 21:40:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:40:59,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:41:00,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1402190400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:41:00,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:41:00,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-12-06 21:41:00,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954454405] [2021-12-06 21:41:00,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:41:00,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 21:41:00,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:41:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 21:41:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1010, Unknown=23, NotChecked=0, Total=1190 [2021-12-06 21:41:00,099 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand has 32 states, 30 states have (on average 2.966666666666667) internal successors, (89), 28 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:41:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:41:01,163 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-12-06 21:41:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 21:41:01,163 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.966666666666667) internal successors, (89), 28 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2021-12-06 21:41:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:41:01,164 INFO L225 Difference]: With dead ends: 137 [2021-12-06 21:41:01,164 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 21:41:01,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=260, Invalid=1603, Unknown=29, NotChecked=0, Total=1892 [2021-12-06 21:41:01,165 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 63 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:41:01,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1150 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 320 Invalid, 0 Unknown, 126 Unchecked, 0.6s Time] [2021-12-06 21:41:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 21:41:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2021-12-06 21:41:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 117 states have internal predecessors, (131), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:41:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2021-12-06 21:41:01,169 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 56 [2021-12-06 21:41:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:41:01,169 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2021-12-06 21:41:01,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.966666666666667) internal successors, (89), 28 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:41:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2021-12-06 21:41:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 21:41:01,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:41:01,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:41:01,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-12-06 21:41:01,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-06 21:41:01,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:41:01,571 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:41:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:41:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1200404797, now seen corresponding path program 1 times [2021-12-06 21:41:01,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:41:01,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528813555] [2021-12-06 21:41:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:01,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:41:01,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:41:01,576 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:41:01,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-06 21:41:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:41:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 21:41:01,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:41:01,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:41:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528813555] [2021-12-06 21:41:01,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528813555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:41:01,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:41:01,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:41:01,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577776205] [2021-12-06 21:41:01,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:41:01,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:41:01,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:41:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:41:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:41:01,815 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:41:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:41:01,940 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2021-12-06 21:41:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:41:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-12-06 21:41:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:41:01,941 INFO L225 Difference]: With dead ends: 135 [2021-12-06 21:41:01,941 INFO L226 Difference]: Without dead ends: 135 [2021-12-06 21:41:01,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:41:01,942 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 46 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:41:01,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 88 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:41:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-06 21:41:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2021-12-06 21:41:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.3125) internal successors, (126), 114 states have internal predecessors, (126), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:41:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2021-12-06 21:41:01,945 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 57 [2021-12-06 21:41:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:41:01,946 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2021-12-06 21:41:01,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:41:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2021-12-06 21:41:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 21:41:01,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:41:01,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:41:01,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-06 21:41:02,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:41:02,147 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:41:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:41:02,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1285343071, now seen corresponding path program 1 times [2021-12-06 21:41:02,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:41:02,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810295520] [2021-12-06 21:41:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:02,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:41:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:41:02,153 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:41:02,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 21:41:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:02,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 21:41:02,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:03,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:41:03,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:41:03,418 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2773 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_2773) |c_#memory_$Pointer$.base|)) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|)) is different from true [2021-12-06 21:41:03,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:03,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:41:03,899 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:41:03,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2021-12-06 21:41:03,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:03,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-06 21:41:04,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 21:41:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2021-12-06 21:41:04,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:41:04,358 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2777 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2777) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2021-12-06 21:41:04,519 INFO L354 Elim1Store]: treesize reduction 5, result has 72.2 percent of original size [2021-12-06 21:41:04,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 21:41:04,527 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2776 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2777 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_dll_append_~last~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_2776) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2777) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-12-06 21:41:04,535 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2776 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2777 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_dll_append_#t~mem9#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_ArrVal_2776) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2777) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-12-06 21:41:04,544 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2776 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2777 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2776) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2777) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-06 21:41:04,561 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2776 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2777 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2776) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_2777) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-06 21:41:04,773 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:41:04,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810295520] [2021-12-06 21:41:04,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810295520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:41:04,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865704408] [2021-12-06 21:41:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:04,774 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:41:04,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:41:04,774 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:41:04,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-06 21:41:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:05,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 21:41:05,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:05,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:41:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:41:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:05,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:41:05,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:41:06,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:06,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:41:07,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:41:07,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:41:07,776 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2890 (_ BitVec 32))) (= (store |c_old(#length)| |c_node_create_#res#1.base| v_ArrVal_2890) |c_#length|)) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2891 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_#res#1.base| v_ArrVal_2891)))) is different from true [2021-12-06 21:41:07,813 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:41:07,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 21:41:07,834 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:41:07,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 21:41:07,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:41:08,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:41:08,726 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:41:08,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2021-12-06 21:41:08,737 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 21:41:08,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 21:41:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:08,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-12-06 21:41:09,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-06 21:41:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 21:41:09,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:41:09,198 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2895 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2895) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (_ bv1 1)))) is different from false [2021-12-06 21:41:09,224 INFO L354 Elim1Store]: treesize reduction 5, result has 72.2 percent of original size [2021-12-06 21:41:09,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-06 21:41:09,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:41:09,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 71 [2021-12-06 21:41:09,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-12-06 21:41:09,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-06 21:41:10,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [865704408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:41:10,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:41:10,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 47 [2021-12-06 21:41:10,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270759139] [2021-12-06 21:41:10,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:41:10,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 21:41:10,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:41:10,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 21:41:10,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2635, Unknown=50, NotChecked=888, Total=3782 [2021-12-06 21:41:10,949 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand has 48 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 40 states have internal predecessors, (102), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:41:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:41:14,962 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2021-12-06 21:41:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 21:41:14,962 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 40 states have internal predecessors, (102), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2021-12-06 21:41:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:41:14,963 INFO L225 Difference]: With dead ends: 152 [2021-12-06 21:41:14,963 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 21:41:14,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=437, Invalid=5689, Unknown=68, NotChecked=1288, Total=7482 [2021-12-06 21:41:14,966 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 39 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 604 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:41:14,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1345 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 288 Invalid, 0 Unknown, 604 Unchecked, 0.6s Time] [2021-12-06 21:41:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 21:41:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-12-06 21:41:14,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 123 states have (on average 1.2520325203252032) internal successors, (154), 141 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:41:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2021-12-06 21:41:14,970 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 58 [2021-12-06 21:41:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:41:14,970 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2021-12-06 21:41:14,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 40 states have internal predecessors, (102), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:41:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2021-12-06 21:41:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 21:41:14,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:41:14,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:41:14,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-12-06 21:41:15,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-06 21:41:15,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:41:15,373 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:41:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:41:15,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1285343072, now seen corresponding path program 1 times [2021-12-06 21:41:15,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:41:15,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527267634] [2021-12-06 21:41:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:15,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:41:15,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:41:15,378 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:41:15,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-06 21:41:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:16,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 21:41:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:16,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:41:16,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:41:16,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:41:16,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:41:16,654 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3012 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_3012) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3011 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_node_create_#res#1.base| v_ArrVal_3011) |c_#memory_$Pointer$.offset|)) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|)) is different from true [2021-12-06 21:41:16,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:16,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:41:16,716 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:41:16,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 21:41:16,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:41:17,276 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:41:17,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-12-06 21:41:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:17,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 21:41:17,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:17,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-12-06 21:41:17,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:17,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-12-06 21:41:17,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-06 21:41:17,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 21:41:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2021-12-06 21:41:17,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:41:18,202 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32))))) (forall ((v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3020 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3020) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 21:41:18,236 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3018 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3020 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3017) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3018) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3020) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3017) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2021-12-06 21:41:18,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:41:18,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2021-12-06 21:41:18,392 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3017) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|))) (or (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3017) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv0 32))) (forall ((v_ArrVal_3018 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3020 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_dll_append_~last~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3018) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3020) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_prenex_7 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_8 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_prenex_7) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_prenex_8) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2021-12-06 21:41:18,432 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_7 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_8 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_prenex_7) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_prenex_8) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd .cse0 (_ bv8 32))))) (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_ArrVal_3017) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) |c_ULTIMATE.start_dll_append_#t~mem9#1.offset|))) (or (forall ((v_ArrVal_3018 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3020 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_dll_append_#t~mem9#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_ArrVal_3018) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3020) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_ArrVal_3017) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv0 32))))) is different from false [2021-12-06 21:41:18,479 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_ArrVal_3017) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)) (bvadd (_ bv8 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (forall ((v_prenex_7 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_8 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_prenex_7) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_prenex_8) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd .cse0 (_ bv8 32))))) (or (forall ((v_ArrVal_3018 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3020 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (= .cse1 (select (select (store (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_3018) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3020) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_ArrVal_3017) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32)))))) is different from false [2021-12-06 21:41:18,556 WARN L838 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3018 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3020 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3018) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_3020) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_ArrVal_3017) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv0 32)))) (forall ((v_ArrVal_3017 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3019 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_ArrVal_3017) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_3019) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (forall ((v_prenex_7 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_8 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) v_prenex_7) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_prenex_8) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32)))))) is different from false [2021-12-06 21:41:19,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:41:19,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527267634] [2021-12-06 21:41:19,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527267634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:41:19,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1770081929] [2021-12-06 21:41:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:19,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:41:19,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:41:19,443 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:41:19,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-12-06 21:41:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:19,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 21:41:19,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:21,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:41:21,795 WARN L860 $PredicateComparison]: unable to prove that (and (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_3135 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_3135) |c_#memory_$Pointer$.base|))) is different from true [2021-12-06 21:41:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:41:22,632 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:41:22,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 21:41:22,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:41:22,696 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:41:22,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 21:41:23,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:23,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-12-06 21:41:23,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:23,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 21:41:23,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-06 21:41:23,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-12-06 21:41:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2021-12-06 21:41:24,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:41:24,143 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3143 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3142 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3143) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3142) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3143 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3143) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2021-12-06 21:41:24,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:41:24,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2021-12-06 21:41:26,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:41:26,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 447 treesize of output 394 [2021-12-06 21:41:26,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 374 treesize of output 370 [2021-12-06 21:41:26,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 370 treesize of output 362 [2021-12-06 21:41:26,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 362 treesize of output 346 [2021-12-06 21:41:26,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 346 treesize of output 338 [2021-12-06 21:41:41,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1770081929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:41:41,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:41:41,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2021-12-06 21:41:41,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318497093] [2021-12-06 21:41:41,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:41:41,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 21:41:41,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:41:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 21:41:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2343, Unknown=48, NotChecked=954, Total=3540 [2021-12-06 21:41:41,268 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 44 states, 41 states have (on average 2.292682926829268) internal successors, (94), 38 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:41:50,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:41:50,564 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2021-12-06 21:41:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 21:41:50,565 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.292682926829268) internal successors, (94), 38 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2021-12-06 21:41:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:41:50,566 INFO L225 Difference]: With dead ends: 152 [2021-12-06 21:41:50,566 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 21:41:50,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=324, Invalid=4079, Unknown=55, NotChecked=1242, Total=5700 [2021-12-06 21:41:50,569 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 37 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:41:50,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1058 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 642 Unchecked, 1.4s Time] [2021-12-06 21:41:50,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 21:41:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-12-06 21:41:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 123 states have (on average 1.2439024390243902) internal successors, (153), 141 states have internal predecessors, (153), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:41:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2021-12-06 21:41:50,573 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 58 [2021-12-06 21:41:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:41:50,574 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2021-12-06 21:41:50,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.292682926829268) internal successors, (94), 38 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:41:50,574 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2021-12-06 21:41:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 21:41:50,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:41:50,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:41:50,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-06 21:41:50,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-12-06 21:41:50,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:41:50,975 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:41:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:41:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1757191502, now seen corresponding path program 2 times [2021-12-06 21:41:50,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:41:50,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513544778] [2021-12-06 21:41:50,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:41:50,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:41:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:41:50,977 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:41:50,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-06 21:41:51,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:41:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:41:51,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 21:41:51,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:51,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:41:52,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:41:52,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:41:55,659 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:41:55,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 21:41:55,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:41:55,956 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:41:55,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 21:41:56,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:41:56,254 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:41:56,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 21:41:57,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:41:57,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:41:57,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 21:41:57,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 21:41:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:58,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:41:58,677 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:41:58,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 70 [2021-12-06 21:41:58,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-12-06 21:42:01,584 INFO L354 Elim1Store]: treesize reduction 11, result has 66.7 percent of original size [2021-12-06 21:42:01,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 72 [2021-12-06 21:42:01,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-06 21:42:01,723 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-06 21:42:01,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 21:42:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:42:04,351 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-06 21:42:04,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 92 [2021-12-06 21:42:04,553 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 21:42:04,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2021-12-06 21:42:04,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:42:04,648 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-12-06 21:42:04,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2021-12-06 21:42:12,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:42:13,202 INFO L354 Elim1Store]: treesize reduction 88, result has 24.1 percent of original size [2021-12-06 21:42:13,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 152 treesize of output 103 [2021-12-06 21:42:13,461 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-12-06 21:42:13,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 43 [2021-12-06 21:42:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:42:13,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:42:17,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:42:17,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513544778] [2021-12-06 21:42:17,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513544778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:42:17,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [203761130] [2021-12-06 21:42:17,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:42:17,736 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:42:17,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:42:17,737 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:42:17,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-12-06 21:42:18,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:42:18,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:42:18,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-06 21:42:18,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:18,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:42:20,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:42:20,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:42:24,704 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:42:24,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 21:42:24,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:42:25,002 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:42:25,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 21:42:25,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:42:27,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:42:27,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:42:27,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 21:42:27,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 21:42:28,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:42:28,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:42:28,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:42:28,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:42:28,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 101 [2021-12-06 21:42:28,977 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 21:42:28,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 67 [2021-12-06 21:42:33,019 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:42:33,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 50 [2021-12-06 21:42:33,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-12-06 21:42:33,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:42:33,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 21:42:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:42:34,993 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-06 21:42:34,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 89 [2021-12-06 21:42:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:42:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:42:35,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:42:35,089 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-12-06 21:42:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2021-12-06 21:42:35,281 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 21:42:35,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2021-12-06 21:42:44,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:42:44,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:42:44,250 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-12-06 21:42:44,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 152 treesize of output 82 [2021-12-06 21:42:44,429 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-12-06 21:42:44,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 29 [2021-12-06 21:42:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:42:44,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:42:46,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [203761130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:42:46,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:42:46,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 49 [2021-12-06 21:42:46,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738728521] [2021-12-06 21:42:46,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:42:46,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 21:42:46,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:42:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 21:42:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2719, Unknown=4, NotChecked=0, Total=2970 [2021-12-06 21:42:46,261 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 49 states, 47 states have (on average 1.702127659574468) internal successors, (80), 43 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:42:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:51,317 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-12-06 21:42:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 21:42:51,318 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.702127659574468) internal successors, (80), 43 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2021-12-06 21:42:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:51,319 INFO L225 Difference]: With dead ends: 156 [2021-12-06 21:42:51,319 INFO L226 Difference]: Without dead ends: 156 [2021-12-06 21:42:51,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 84 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=307, Invalid=3466, Unknown=9, NotChecked=0, Total=3782 [2021-12-06 21:42:51,321 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 29 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:51,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 682 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 219 Unchecked, 1.8s Time] [2021-12-06 21:42:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-06 21:42:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2021-12-06 21:42:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 122 states have (on average 1.2377049180327868) internal successors, (151), 140 states have internal predecessors, (151), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:42:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2021-12-06 21:42:51,326 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 59 [2021-12-06 21:42:51,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:51,326 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2021-12-06 21:42:51,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.702127659574468) internal successors, (80), 43 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:42:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2021-12-06 21:42:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 21:42:51,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:51,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:51,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-06 21:42:51,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-12-06 21:42:51,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:42:51,728 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:42:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1735888123, now seen corresponding path program 1 times [2021-12-06 21:42:51,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:42:51,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803160675] [2021-12-06 21:42:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:51,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:42:51,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:42:51,733 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:42:51,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-06 21:42:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:52,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:42:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:42:52,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:42:52,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:42:52,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803160675] [2021-12-06 21:42:52,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803160675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:52,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:52,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:42:52,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818964478] [2021-12-06 21:42:52,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:52,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:52,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:42:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:52,180 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:42:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:52,662 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2021-12-06 21:42:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:52,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2021-12-06 21:42:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:52,665 INFO L225 Difference]: With dead ends: 150 [2021-12-06 21:42:52,665 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 21:42:52,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:52,665 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:52,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 96 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 21:42:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 21:42:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-12-06 21:42:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 122 states have (on average 1.221311475409836) internal successors, (149), 139 states have internal predecessors, (149), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:42:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2021-12-06 21:42:52,670 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 60 [2021-12-06 21:42:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:52,670 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2021-12-06 21:42:52,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:42:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2021-12-06 21:42:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 21:42:52,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:52,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:52,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-12-06 21:42:52,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:42:52,872 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:42:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:52,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2022079807, now seen corresponding path program 1 times [2021-12-06 21:42:52,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:42:52,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621368438] [2021-12-06 21:42:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:52,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:42:52,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:42:52,877 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:42:52,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-06 21:42:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 21:42:53,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:53,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:42:56,276 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:42:56,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 21:42:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:42:57,942 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:42:57,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 60 [2021-12-06 21:42:57,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 21:43:00,005 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 21:43:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 60 [2021-12-06 21:43:00,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-06 21:43:00,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 21:43:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:02,277 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 21:43:02,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 80 [2021-12-06 21:43:02,466 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 21:43:02,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 63 [2021-12-06 21:43:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:02,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:43:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:43:05,422 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 21:43:05,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 32 [2021-12-06 21:43:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:43:06,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:08,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:43:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621368438] [2021-12-06 21:43:08,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621368438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1992726833] [2021-12-06 21:43:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:08,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:43:08,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:43:08,167 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:43:08,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-12-06 21:43:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 21:43:08,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:09,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:43:14,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 21:43:14,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-06 21:43:18,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:18,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2021-12-06 21:43:18,366 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 21:43:18,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-12-06 21:43:21,853 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-06 21:43:21,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-12-06 21:43:22,121 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:43:22,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 21:43:22,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:43:23,235 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-06 21:43:23,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 88 [2021-12-06 21:43:23,363 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 21:43:23,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 77 [2021-12-06 21:43:24,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2021-12-06 21:43:26,328 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-06 21:43:26,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 21 [2021-12-06 21:43:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:43:27,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:29,366 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3753 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3751))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3753) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32)))))) is different from false [2021-12-06 21:43:29,419 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3747 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3753 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3751))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_3747) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3753) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (_ bv0 32)))) is different from false [2021-12-06 21:43:29,520 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3747 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3753 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_#t~mem9#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_#t~mem9#1.offset|) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3751))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_#t~mem9#1.base| v_ArrVal_3747) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3753) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (_ bv0 32)))) is different from false [2021-12-06 21:43:29,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:29,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 634 treesize of output 574 [2021-12-06 21:43:29,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 562 treesize of output 554 [2021-12-06 21:43:29,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 554 treesize of output 550 [2021-12-06 21:43:31,221 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_329 (_ BitVec 32)) (v_arrayElimCell_330 (_ BitVec 32))) (or (let ((.cse3 (= |c_ULTIMATE.start_main_~#s~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (let ((.cse0 (= |c_ULTIMATE.start_dll_append_~new_last~0#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse6 (not .cse3))) (and (or .cse0 (and (or (forall ((v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse1 (store (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) (bvadd v_arrayElimCell_330 (_ bv4 32)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|))) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3751))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd v_arrayElimCell_329 (_ bv4 32))) (_ bv0 32)))) .cse3) (or (forall ((v_arrayElimCell_332 (_ BitVec 32)) (v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse4 (store (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.base| .cse5 (store (select |c_#memory_$Pointer$.base| .cse5) (bvadd v_arrayElimCell_330 (_ bv4 32)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|))) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3751))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd v_arrayElimCell_332 (_ bv4 32))) (_ bv0 32)))) .cse6))) (or (not .cse0) (let ((.cse7 (forall ((v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_331 (_ BitVec 32))) (not (= (select (let ((.cse8 (store (let ((.cse9 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.base| .cse9 (store (select |c_#memory_$Pointer$.base| .cse9) (bvadd v_arrayElimCell_330 (_ bv4 32)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|))) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_3751))) (select .cse8 (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd v_arrayElimCell_331 (_ bv4 32))) (_ bv0 32)))))) (and (or .cse7 .cse3) (or .cse7 .cse6))))))) (and (= |c_ULTIMATE.start_dll_append_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|) (not (= v_arrayElimCell_329 v_arrayElimCell_330)) (= |c_ULTIMATE.start_main_~#s~0#1.base| |c_ULTIMATE.start_dll_append_~head#1.base|)))) is different from false [2021-12-06 21:43:35,677 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_329 (_ BitVec 32)) (v_arrayElimCell_330 (_ BitVec 32))) (or (let ((.cse2 (= |c_ULTIMATE.start_main_~#s~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (let ((.cse5 (not .cse2)) (.cse6 (= |c_ULTIMATE.start_main_~#s~0#1.base| |c_ULTIMATE.start_dll_append_#t~ret7#1.base|))) (and (or (and (or (forall ((v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.base| .cse1 (store (select |c_#memory_$Pointer$.base| .cse1) (bvadd v_arrayElimCell_330 (_ bv4 32)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base|))) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_3751))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd v_arrayElimCell_329 (_ bv4 32))) (_ bv0 32)))) .cse2) (or (forall ((v_arrayElimCell_332 (_ BitVec 32)) (v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse3 (store (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.base| .cse4 (store (select |c_#memory_$Pointer$.base| .cse4) (bvadd v_arrayElimCell_330 (_ bv4 32)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base|))) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_3751))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd v_arrayElimCell_332 (_ bv4 32))) (_ bv0 32)))) .cse5)) .cse6) (or (let ((.cse7 (forall ((v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_331 (_ BitVec 32))) (not (= (select (let ((.cse8 (store (let ((.cse9 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.base| .cse9 (store (select |c_#memory_$Pointer$.base| .cse9) (bvadd v_arrayElimCell_330 (_ bv4 32)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base|))) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_3751))) (select .cse8 (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd v_arrayElimCell_331 (_ bv4 32))) (_ bv0 32)))))) (and (or .cse7 .cse2) (or .cse7 .cse5))) (not .cse6))))) (and (= |c_ULTIMATE.start_dll_append_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|) (not (= v_arrayElimCell_329 v_arrayElimCell_330)) (= |c_ULTIMATE.start_main_~#s~0#1.base| |c_ULTIMATE.start_dll_append_~head#1.base|)))) is different from false [2021-12-06 21:43:50,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1992726833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:50,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:43:50,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 48 [2021-12-06 21:43:50,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779444150] [2021-12-06 21:43:50,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:43:50,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 21:43:50,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:43:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 21:43:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2999, Unknown=18, NotChecked=570, Total=3782 [2021-12-06 21:43:50,128 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand has 48 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 41 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:44:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:44:05,788 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2021-12-06 21:44:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 21:44:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 41 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 61 [2021-12-06 21:44:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:44:05,791 INFO L225 Difference]: With dead ends: 152 [2021-12-06 21:44:05,791 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 21:44:05,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=362, Invalid=5638, Unknown=26, NotChecked=780, Total=6806 [2021-12-06 21:44:05,794 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:44:05,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1169 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 385 Unchecked, 1.4s Time] [2021-12-06 21:44:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 21:44:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-12-06 21:44:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 140 states have internal predecessors, (149), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:44:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2021-12-06 21:44:05,799 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 61 [2021-12-06 21:44:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:44:05,800 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2021-12-06 21:44:05,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 41 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:44:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2021-12-06 21:44:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 21:44:05,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:44:05,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:44:05,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-12-06 21:44:06,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-12-06 21:44:06,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:44:06,202 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 43 more)] === [2021-12-06 21:44:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:44:06,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1296901353, now seen corresponding path program 1 times [2021-12-06 21:44:06,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:44:06,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580403538] [2021-12-06 21:44:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:44:06,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:44:06,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:44:06,206 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:44:06,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-06 21:44:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:44:06,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 21:44:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:44:06,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:44:06,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:44:07,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:44:07,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:44:09,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:44:09,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:44:09,932 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:44:09,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 21:44:10,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:44:13,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:44:13,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:44:14,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:44:15,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 21:44:15,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:44:20,973 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:44:20,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 21:44:21,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:44:21,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 21:44:26,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:44:26,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-06 21:44:28,331 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 21:44:28,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 44 [2021-12-06 21:44:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:44:29,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-06 21:44:30,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-12-06 21:44:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:44:31,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:44:36,924 INFO L354 Elim1Store]: treesize reduction 5, result has 72.2 percent of original size [2021-12-06 21:44:36,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-06 21:44:42,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:44:42,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580403538] [2021-12-06 21:44:42,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580403538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:44:42,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417966289] [2021-12-06 21:44:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:44:42,841 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:44:42,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:44:42,842 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:44:42,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-06 21:44:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:44:43,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 21:44:43,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:44:43,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:44:43,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:44:44,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:44:44,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:44:45,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:44:50,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:44:50,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:44:52,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:44:52,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:44:54,383 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:44:54,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 21:45:01,220 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-12-06 21:45:01,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 61 [2021-12-06 21:45:01,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:45:01,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-06 21:45:06,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:45:07,583 INFO L354 Elim1Store]: treesize reduction 54, result has 49.1 percent of original size [2021-12-06 21:45:07,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 149 [2021-12-06 21:45:07,600 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-06 21:45:07,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174789404] [2021-12-06 21:45:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:07,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:07,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:07,601 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:07,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 21:45:07,733 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@685e962 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:274) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1226) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:388) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 21:45:07,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:45:07,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-06 21:45:07,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353086106] [2021-12-06 21:45:07,734 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:07,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 21:45:07,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:45:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 21:45:07,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2960, Unknown=47, NotChecked=0, Total=3192 [2021-12-06 21:45:07,735 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:45:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:45:07,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=185, Invalid=2960, Unknown=47, NotChecked=0, Total=3192 [2021-12-06 21:45:07,737 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:07,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2021-12-06 21:45:07,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-12-06 21:45:07,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-12-06 21:45:08,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-06 21:45:08,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:08,339 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@685e962 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 21:45:08,344 INFO L158 Benchmark]: Toolchain (without parser) took 329586.94ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 38.0MB in the beginning and 27.2MB in the end (delta: 10.8MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. [2021-12-06 21:45:08,345 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 58.7MB. Free memory was 40.0MB in the beginning and 39.9MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:45:08,345 INFO L158 Benchmark]: CACSL2BoogieTranslator took 326.71ms. Allocated memory is still 58.7MB. Free memory was 37.8MB in the beginning and 33.6MB in the end (delta: 4.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 21:45:08,346 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.75ms. Allocated memory is still 58.7MB. Free memory was 33.6MB in the beginning and 31.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:45:08,346 INFO L158 Benchmark]: Boogie Preprocessor took 26.06ms. Allocated memory is still 58.7MB. Free memory was 31.2MB in the beginning and 29.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:45:08,347 INFO L158 Benchmark]: RCFGBuilder took 551.21ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 29.2MB in the beginning and 54.2MB in the end (delta: -24.9MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2021-12-06 21:45:08,347 INFO L158 Benchmark]: TraceAbstraction took 328641.20ms. Allocated memory is still 86.0MB. Free memory was 53.7MB in the beginning and 27.2MB in the end (delta: 26.5MB). Peak memory consumption was 27.6MB. Max. memory is 16.1GB. [2021-12-06 21:45:08,350 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 58.7MB. Free memory was 40.0MB in the beginning and 39.9MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 326.71ms. Allocated memory is still 58.7MB. Free memory was 37.8MB in the beginning and 33.6MB in the end (delta: 4.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.75ms. Allocated memory is still 58.7MB. Free memory was 33.6MB in the beginning and 31.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.06ms. Allocated memory is still 58.7MB. Free memory was 31.2MB in the beginning and 29.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 551.21ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 29.2MB in the beginning and 54.2MB in the end (delta: -24.9MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * TraceAbstraction took 328641.20ms. Allocated memory is still 86.0MB. Free memory was 53.7MB in the beginning and 27.2MB in the end (delta: 26.5MB). Peak memory consumption was 27.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@685e962 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@685e962: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-06 21:45:08,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe9ebdf2-db99-431a-b60c-7f77360ce501/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 Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@685e962