./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/elimination_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:23:15,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:23:15,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:23:15,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:23:15,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:23:15,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:23:15,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:23:15,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:23:15,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:23:15,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:23:15,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:23:15,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:23:15,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:23:15,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:23:15,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:23:15,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:23:15,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:23:15,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:23:15,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:23:15,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:23:15,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:23:15,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:23:15,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:23:15,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:23:15,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:23:15,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:23:15,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:23:15,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:23:15,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:23:15,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:23:15,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:23:15,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:23:15,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:23:15,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:23:15,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:23:15,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:23:15,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:23:15,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:23:15,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:23:15,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:23:15,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:23:15,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:23:15,459 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:23:15,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:23:15,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:23:15,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:23:15,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:23:15,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:23:15,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:23:15,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:23:15,463 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:23:15,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:23:15,464 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:23:15,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:23:15,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:23:15,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:23:15,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:23:15,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:23:15,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:23:15,466 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:23:15,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:23:15,466 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:23:15,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:23:15,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:23:15,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:23:15,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:23:15,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:23:15,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:23:15,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:23:15,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:23:15,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:23:15,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:23:15,470 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:23:15,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:23:15,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:23:15,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:23:15,471 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_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e [2021-11-19 04:23:15,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:23:15,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:23:15,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:23:15,786 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:23:15,787 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:23:15,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/verifythis/elimination_max.c [2021-11-19 04:23:15,873 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data/eb88bbacf/6cff03bc44d643dd826aa51e6e813eaa/FLAGa14a206b6 [2021-11-19 04:23:16,312 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:23:16,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/sv-benchmarks/c/verifythis/elimination_max.c [2021-11-19 04:23:16,320 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data/eb88bbacf/6cff03bc44d643dd826aa51e6e813eaa/FLAGa14a206b6 [2021-11-19 04:23:16,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data/eb88bbacf/6cff03bc44d643dd826aa51e6e813eaa [2021-11-19 04:23:16,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:23:16,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:23:16,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:23:16,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:23:16,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:23:16,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:23:16" (1/1) ... [2021-11-19 04:23:16,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1745915e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:16, skipping insertion in model container [2021-11-19 04:23:16,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:23:16" (1/1) ... [2021-11-19 04:23:16,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:23:16,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:23:16,978 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_21904d25-9ca0-43bf-8d54-40192411ceba/sv-benchmarks/c/verifythis/elimination_max.c[485,498] [2021-11-19 04:23:16,993 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:23:17,005 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:23:17,017 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_21904d25-9ca0-43bf-8d54-40192411ceba/sv-benchmarks/c/verifythis/elimination_max.c[485,498] [2021-11-19 04:23:17,023 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:23:17,037 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:23:17,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17 WrapperNode [2021-11-19 04:23:17,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:23:17,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:23:17,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:23:17,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:23:17,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,074 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2021-11-19 04:23:17,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:23:17,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:23:17,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:23:17,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:23:17,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:23:17,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:23:17,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:23:17,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:23:17,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (1/1) ... [2021-11-19 04:23:17,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:23:17,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:17,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:23:17,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:23:17,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:23:17,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 04:23:17,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 04:23:17,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:23:17,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:23:17,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:23:17,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:23:17,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:23:17,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:23:17,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:23:17,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:23:17,256 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:23:17,258 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:23:17,432 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:23:17,438 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:23:17,438 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 04:23:17,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:23:17 BoogieIcfgContainer [2021-11-19 04:23:17,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:23:17,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:23:17,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:23:17,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:23:17,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:23:16" (1/3) ... [2021-11-19 04:23:17,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452562e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:23:17, skipping insertion in model container [2021-11-19 04:23:17,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:17" (2/3) ... [2021-11-19 04:23:17,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452562e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:23:17, skipping insertion in model container [2021-11-19 04:23:17,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:23:17" (3/3) ... [2021-11-19 04:23:17,449 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2021-11-19 04:23:17,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:23:17,470 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:23:17,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:23:17,522 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:23:17,522 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:23:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:23:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:23:17,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:17,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:17,545 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:17,550 INFO L85 PathProgramCache]: Analyzing trace with hash 434333419, now seen corresponding path program 1 times [2021-11-19 04:23:17,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:17,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301184657] [2021-11-19 04:23:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:17,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:17,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:23:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:17,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:23:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:23:17,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:17,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301184657] [2021-11-19 04:23:17,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301184657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:23:17,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:23:17,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:23:17,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630276356] [2021-11-19 04:23:17,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:23:17,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:23:17,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:17,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:23:17,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:23:17,761 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:17,791 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-11-19 04:23:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:23:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-11-19 04:23:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:17,801 INFO L225 Difference]: With dead ends: 57 [2021-11-19 04:23:17,802 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 04:23:17,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:23:17,816 INFO L933 BasicCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:17,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:23:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 04:23:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-19 04:23:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:23:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-19 04:23:17,883 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2021-11-19 04:23:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:17,883 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-19 04:23:17,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-19 04:23:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:23:17,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:17,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:17,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:23:17,888 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1040778997, now seen corresponding path program 1 times [2021-11-19 04:23:17,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:17,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726613196] [2021-11-19 04:23:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:17,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:18,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:23:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:18,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:23:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:23:18,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:18,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726613196] [2021-11-19 04:23:18,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726613196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:23:18,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:23:18,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:23:18,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379013616] [2021-11-19 04:23:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:23:18,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:23:18,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:23:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:23:18,203 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:18,369 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-19 04:23:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:23:18,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-11-19 04:23:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:18,372 INFO L225 Difference]: With dead ends: 32 [2021-11-19 04:23:18,373 INFO L226 Difference]: Without dead ends: 30 [2021-11-19 04:23:18,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:23:18,380 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:18,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 103 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:23:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-19 04:23:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-19 04:23:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:23:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-19 04:23:18,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2021-11-19 04:23:18,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:18,401 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-19 04:23:18,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:18,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-19 04:23:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:23:18,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:18,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:18,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:23:18,403 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:18,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1270583733, now seen corresponding path program 1 times [2021-11-19 04:23:18,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:18,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583665360] [2021-11-19 04:23:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:18,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:18,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:23:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:18,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:23:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:18,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:23:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:23:18,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:18,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583665360] [2021-11-19 04:23:18,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583665360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:23:18,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:23:18,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:23:18,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425215301] [2021-11-19 04:23:18,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:23:18,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:23:18,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:18,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:23:18,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:23:18,640 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:23:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:18,772 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-19 04:23:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:23:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-11-19 04:23:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:18,775 INFO L225 Difference]: With dead ends: 30 [2021-11-19 04:23:18,775 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 04:23:18,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:23:18,781 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:18,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 117 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:23:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 04:23:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 04:23:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 04:23:18,785 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-11-19 04:23:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:18,785 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 04:23:18,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:23:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 04:23:18,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 04:23:18,789 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 04:23:18,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:23:18,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 04:23:18,839 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 25 37) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)))) [2021-11-19 04:23:18,840 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-19 04:23:18,840 INFO L858 garLoopResultBuilder]: For program point L25-2(lines 25 37) no Hoare annotation was computed. [2021-11-19 04:23:18,840 INFO L861 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: true [2021-11-19 04:23:18,840 INFO L858 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-11-19 04:23:18,840 INFO L861 garLoopResultBuilder]: At program point L50(lines 16 51) the Hoare annotation is: true [2021-11-19 04:23:18,841 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (<= 0 |ULTIMATE.start_main_#t~mem16#1|) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)) (= |ULTIMATE.start_main_#t~mem15#1| 0))) [2021-11-19 04:23:18,842 INFO L858 garLoopResultBuilder]: For program point L46-1(line 46) no Hoare annotation was computed. [2021-11-19 04:23:18,843 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)))) [2021-11-19 04:23:18,843 INFO L858 garLoopResultBuilder]: For program point L42-1(line 42) no Hoare annotation was computed. [2021-11-19 04:23:18,843 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-19 04:23:18,843 INFO L858 garLoopResultBuilder]: For program point L-1-1(line -1) no Hoare annotation was computed. [2021-11-19 04:23:18,843 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-19 04:23:18,844 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-19 04:23:18,844 INFO L854 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0)) (.cse1 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|))) (and (= .cse0 .cse1) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)) (= |ULTIMATE.start_main_#t~mem12#1| 0) (= (select .cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|))) [2021-11-19 04:23:18,844 INFO L858 garLoopResultBuilder]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2021-11-19 04:23:18,844 INFO L858 garLoopResultBuilder]: For program point L43-1(line 43) no Hoare annotation was computed. [2021-11-19 04:23:18,845 INFO L854 garLoopResultBuilder]: At program point L45-3(lines 45 47) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)))) [2021-11-19 04:23:18,845 INFO L858 garLoopResultBuilder]: For program point L45-4(lines 45 47) no Hoare annotation was computed. [2021-11-19 04:23:18,845 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 36) no Hoare annotation was computed. [2021-11-19 04:23:18,848 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-11-19 04:23:18,849 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-11-19 04:23:18,849 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-11-19 04:23:18,849 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-11-19 04:23:18,849 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 12) the Hoare annotation is: true [2021-11-19 04:23:18,849 INFO L858 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-11-19 04:23:18,851 INFO L858 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-11-19 04:23:18,852 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 12) no Hoare annotation was computed. [2021-11-19 04:23:18,855 INFO L858 garLoopResultBuilder]: For program point L11-3(lines 10 12) no Hoare annotation was computed. [2021-11-19 04:23:18,855 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-11-19 04:23:18,862 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-19 04:23:18,863 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 04:23:18,871 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:240) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:192) 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) [2021-11-19 04:23:18,876 INFO L158 Benchmark]: Toolchain (without parser) took 2162.23ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 59.9MB in the beginning and 57.7MB in the end (delta: 2.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-19 04:23:18,877 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 94.4MB. Free memory was 66.1MB in the beginning and 66.0MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:23:18,877 INFO L158 Benchmark]: CACSL2BoogieTranslator took 322.02ms. Allocated memory is still 94.4MB. Free memory was 59.6MB in the beginning and 69.2MB in the end (delta: -9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 04:23:18,877 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.25ms. Allocated memory is still 94.4MB. Free memory was 69.2MB in the beginning and 67.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:23:18,878 INFO L158 Benchmark]: Boogie Preprocessor took 24.43ms. Allocated memory is still 94.4MB. Free memory was 67.7MB in the beginning and 66.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 04:23:18,879 INFO L158 Benchmark]: RCFGBuilder took 340.44ms. Allocated memory is still 94.4MB. Free memory was 66.3MB in the beginning and 55.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 04:23:18,879 INFO L158 Benchmark]: TraceAbstraction took 1431.29ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 55.5MB in the beginning and 57.7MB in the end (delta: -2.2MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2021-11-19 04:23:18,881 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 94.4MB. Free memory was 66.1MB in the beginning and 66.0MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 322.02ms. Allocated memory is still 94.4MB. Free memory was 59.6MB in the beginning and 69.2MB in the end (delta: -9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.25ms. Allocated memory is still 94.4MB. Free memory was 69.2MB in the beginning and 67.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 24.43ms. Allocated memory is still 94.4MB. Free memory was 67.7MB in the beginning and 66.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 340.44ms. Allocated memory is still 94.4MB. Free memory was 66.3MB in the beginning and 55.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1431.29ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 55.5MB in the beginning and 57.7MB in the end (delta: -2.2MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 59 mSDsluCounter, 254 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 173 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101 IncrementalHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 81 mSDtfsCounter, 101 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 20 NumberOfFragments, 89 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 67 ConstructedInterpolants, 0 QuantifiedInterpolants, 219 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:240) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-19 04:23:18,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:23:21,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:23:21,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:23:21,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:23:21,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:23:21,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:23:21,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:23:21,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:23:21,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:23:21,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:23:21,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:23:21,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:23:21,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:23:21,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:23:21,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:23:21,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:23:21,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:23:21,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:23:21,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:23:21,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:23:21,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:23:21,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:23:21,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:23:21,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:23:21,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:23:21,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:23:21,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:23:21,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:23:21,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:23:21,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:23:21,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:23:21,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:23:21,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:23:21,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:23:21,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:23:21,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:23:21,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:23:21,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:23:21,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:23:21,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:23:21,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:23:21,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-19 04:23:21,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:23:21,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:23:21,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:23:21,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:23:21,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:23:21,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:23:21,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:23:21,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:23:21,681 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:23:21,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:23:21,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:23:21,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:23:21,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:23:21,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:23:21,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:23:21,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:23:21,684 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 04:23:21,684 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 04:23:21,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:23:21,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:23:21,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:23:21,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:23:21,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:23:21,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:23:21,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:23:21,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:23:21,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:23:21,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:23:21,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:23:21,687 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-19 04:23:21,687 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 04:23:21,688 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:23:21,688 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:23:21,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:23:21,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:23:21,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 04:23:21,689 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_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e [2021-11-19 04:23:22,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:23:22,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:23:22,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:23:22,109 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:23:22,110 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:23:22,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/verifythis/elimination_max.c [2021-11-19 04:23:22,176 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data/0a21daf28/537d2fe402c4497baf35336466169f4c/FLAGeada3a74c [2021-11-19 04:23:22,644 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:23:22,644 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/sv-benchmarks/c/verifythis/elimination_max.c [2021-11-19 04:23:22,651 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data/0a21daf28/537d2fe402c4497baf35336466169f4c/FLAGeada3a74c [2021-11-19 04:23:23,037 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/data/0a21daf28/537d2fe402c4497baf35336466169f4c [2021-11-19 04:23:23,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:23:23,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:23:23,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:23:23,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:23:23,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:23:23,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d100c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23, skipping insertion in model container [2021-11-19 04:23:23,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:23:23,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:23:23,255 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_21904d25-9ca0-43bf-8d54-40192411ceba/sv-benchmarks/c/verifythis/elimination_max.c[485,498] [2021-11-19 04:23:23,273 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:23:23,285 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:23:23,306 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_21904d25-9ca0-43bf-8d54-40192411ceba/sv-benchmarks/c/verifythis/elimination_max.c[485,498] [2021-11-19 04:23:23,313 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:23:23,328 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:23:23,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23 WrapperNode [2021-11-19 04:23:23,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:23:23,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:23:23,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:23:23,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:23:23,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,376 INFO L137 Inliner]: procedures = 20, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2021-11-19 04:23:23,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:23:23,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:23:23,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:23:23,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:23:23,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:23:23,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:23:23,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:23:23,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:23:23,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (1/1) ... [2021-11-19 04:23:23,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:23:23,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:23,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:23:23,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:23:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:23:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 04:23:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 04:23:23,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 04:23:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:23:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 04:23:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:23:23,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:23:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:23:23,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:23:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:23:23,639 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:23:23,641 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:23:23,840 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:23:23,846 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:23:23,847 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 04:23:23,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:23:23 BoogieIcfgContainer [2021-11-19 04:23:23,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:23:23,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:23:23,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:23:23,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:23:23,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:23:23" (1/3) ... [2021-11-19 04:23:23,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1301865d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:23:23, skipping insertion in model container [2021-11-19 04:23:23,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:23" (2/3) ... [2021-11-19 04:23:23,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1301865d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:23:23, skipping insertion in model container [2021-11-19 04:23:23,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:23:23" (3/3) ... [2021-11-19 04:23:23,857 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2021-11-19 04:23:23,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:23:23,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:23:23,949 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:23:23,956 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:23:23,957 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:23:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:23:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:23:23,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:23,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:23,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash 434333419, now seen corresponding path program 1 times [2021-11-19 04:23:24,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:23:24,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362892976] [2021-11-19 04:23:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:24,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:23:24,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:23:24,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:23:24,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 04:23:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:24,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 04:23:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:23:24,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:23:24,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:23:24,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362892976] [2021-11-19 04:23:24,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362892976] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 04:23:24,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:23:24,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 04:23:24,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719385010] [2021-11-19 04:23:24,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:23:24,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:23:24,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:23:24,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:23:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:23:24,386 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:24,414 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-11-19 04:23:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:23:24,417 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-11-19 04:23:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:24,424 INFO L225 Difference]: With dead ends: 57 [2021-11-19 04:23:24,424 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 04:23:24,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:23:24,434 INFO L933 BasicCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:24,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:23:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 04:23:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-19 04:23:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:23:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-19 04:23:24,492 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2021-11-19 04:23:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:24,493 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-19 04:23:24,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-19 04:23:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:23:24,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:24,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:24,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:24,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:23:24,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1040778997, now seen corresponding path program 1 times [2021-11-19 04:23:24,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:23:24,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269685819] [2021-11-19 04:23:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:24,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:23:24,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:23:24,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:23:24,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 04:23:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:24,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:23:24,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:25,479 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-19 04:23:25,480 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 29 treesize of output 22 [2021-11-19 04:23:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:23:25,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:25,712 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-19 04:23:25,713 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 19 treesize of output 11 [2021-11-19 04:23:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:23:26,604 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:23:26,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269685819] [2021-11-19 04:23:26,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269685819] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:23:26,604 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:23:26,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 10] imperfect sequences [] total 19 [2021-11-19 04:23:26,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813041501] [2021-11-19 04:23:26,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:23:26,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:23:26,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:23:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:23:26,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:23:26,608 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:23:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:27,120 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-11-19 04:23:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:23:27,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2021-11-19 04:23:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:27,122 INFO L225 Difference]: With dead ends: 39 [2021-11-19 04:23:27,122 INFO L226 Difference]: Without dead ends: 37 [2021-11-19 04:23:27,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:23:27,124 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:27,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 203 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 164 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-11-19 04:23:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-19 04:23:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-11-19 04:23:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:23:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-19 04:23:27,135 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 21 [2021-11-19 04:23:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:27,136 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-19 04:23:27,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:23:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-19 04:23:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:23:27,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:27,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:27,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:27,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:23:27,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash 953578392, now seen corresponding path program 1 times [2021-11-19 04:23:27,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:23:27,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740794915] [2021-11-19 04:23:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:27,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:23:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:23:27,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:23:27,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 04:23:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:27,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:23:27,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:28,614 INFO L354 Elim1Store]: treesize reduction 35, result has 40.7 percent of original size [2021-11-19 04:23:28,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 50 [2021-11-19 04:23:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:28,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:35,392 INFO L354 Elim1Store]: treesize reduction 79, result has 21.0 percent of original size [2021-11-19 04:23:35,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 36 [2021-11-19 04:23:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:23:35,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:23:35,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740794915] [2021-11-19 04:23:35,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740794915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:23:35,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:23:35,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 26 [2021-11-19 04:23:35,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945096250] [2021-11-19 04:23:35,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:35,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:23:35,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:23:35,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:23:35,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:23:35,676 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 20 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:23:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:36,751 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-19 04:23:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:23:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 20 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2021-11-19 04:23:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:36,756 INFO L225 Difference]: With dead ends: 57 [2021-11-19 04:23:36,757 INFO L226 Difference]: Without dead ends: 55 [2021-11-19 04:23:36,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:23:36,759 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:36,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 396 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 129 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2021-11-19 04:23:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-19 04:23:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-11-19 04:23:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:23:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-11-19 04:23:36,775 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 23 [2021-11-19 04:23:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:36,776 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-11-19 04:23:36,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 20 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:23:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-11-19 04:23:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:23:36,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:36,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:36,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:36,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:23:36,983 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash 366772378, now seen corresponding path program 1 times [2021-11-19 04:23:36,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:23:36,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460280536] [2021-11-19 04:23:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:36,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:23:36,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:23:36,985 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:23:36,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 04:23:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:23:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:38,052 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-11-19 04:23:38,053 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 47 [2021-11-19 04:23:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:39,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:45,298 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-11-19 04:23:45,299 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 29 [2021-11-19 04:23:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:23:45,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:23:45,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460280536] [2021-11-19 04:23:45,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460280536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:23:45,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:23:45,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-11-19 04:23:45,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902714160] [2021-11-19 04:23:45,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:45,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:23:45,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:23:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:23:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:23:45,564 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 27 states, 25 states have (on average 1.32) internal successors, (33), 21 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:23:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:46,676 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-11-19 04:23:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:23:46,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.32) internal successors, (33), 21 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2021-11-19 04:23:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:46,678 INFO L225 Difference]: With dead ends: 71 [2021-11-19 04:23:46,679 INFO L226 Difference]: Without dead ends: 69 [2021-11-19 04:23:46,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:23:46,682 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:46,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 319 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 139 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2021-11-19 04:23:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-19 04:23:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2021-11-19 04:23:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:23:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-11-19 04:23:46,693 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 23 [2021-11-19 04:23:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:46,694 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-11-19 04:23:46,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.32) internal successors, (33), 21 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:23:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-11-19 04:23:46,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:23:46,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:46,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:46,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:46,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:23:46,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:46,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1241824389, now seen corresponding path program 2 times [2021-11-19 04:23:46,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:23:46,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021052396] [2021-11-19 04:23:46,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:23:46,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:23:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:23:46,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:23:46,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 04:23:46,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:23:46,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:23:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:23:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:48,438 INFO L354 Elim1Store]: treesize reduction 43, result has 46.9 percent of original size [2021-11-19 04:23:48,439 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 67 [2021-11-19 04:23:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:48,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:57,308 INFO L354 Elim1Store]: treesize reduction 141, result has 16.6 percent of original size [2021-11-19 04:23:57,308 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 47 [2021-11-19 04:23:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:23:57,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:23:57,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021052396] [2021-11-19 04:23:57,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021052396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:23:57,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:23:57,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 30 [2021-11-19 04:23:57,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089671835] [2021-11-19 04:23:57,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:57,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:23:57,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:23:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:23:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=767, Unknown=1, NotChecked=0, Total=870 [2021-11-19 04:23:57,715 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 24 states have internal predecessors, (37), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:24:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:02,375 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2021-11-19 04:24:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:24:02,377 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 24 states have internal predecessors, (37), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-11-19 04:24:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:02,378 INFO L225 Difference]: With dead ends: 81 [2021-11-19 04:24:02,379 INFO L226 Difference]: Without dead ends: 79 [2021-11-19 04:24:02,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=245, Invalid=1823, Unknown=2, NotChecked=0, Total=2070 [2021-11-19 04:24:02,381 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 84 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:02,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 403 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 171 Invalid, 0 Unknown, 326 Unchecked, 0.3s Time] [2021-11-19 04:24:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-19 04:24:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 48. [2021-11-19 04:24:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:24:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-11-19 04:24:02,394 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 25 [2021-11-19 04:24:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:02,394 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-11-19 04:24:02,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 24 states have internal predecessors, (37), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:24:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-11-19 04:24:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:24:02,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:02,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:02,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 04:24:02,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:24:02,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:02,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1828630403, now seen corresponding path program 1 times [2021-11-19 04:24:02,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:24:02,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217951488] [2021-11-19 04:24:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:02,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:24:02,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:24:02,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:24:02,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 04:24:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:02,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:24:02,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:04,098 INFO L354 Elim1Store]: treesize reduction 24, result has 59.3 percent of original size [2021-11-19 04:24:04,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 65 [2021-11-19 04:24:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:05,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:11,921 INFO L354 Elim1Store]: treesize reduction 76, result has 24.0 percent of original size [2021-11-19 04:24:11,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 42 [2021-11-19 04:24:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:24:12,322 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:24:12,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217951488] [2021-11-19 04:24:12,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217951488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:12,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:24:12,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-11-19 04:24:12,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914229698] [2021-11-19 04:24:12,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:12,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:24:12,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:24:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:24:12,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:24:12,325 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 25 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:24:16,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:16,016 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-11-19 04:24:16,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:24:16,017 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 25 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-11-19 04:24:16,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:16,019 INFO L225 Difference]: With dead ends: 84 [2021-11-19 04:24:16,019 INFO L226 Difference]: Without dead ends: 82 [2021-11-19 04:24:16,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:24:16,021 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:16,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 336 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 0 Unknown, 185 Unchecked, 0.3s Time] [2021-11-19 04:24:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-19 04:24:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2021-11-19 04:24:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 40 states have internal predecessors, (51), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:24:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2021-11-19 04:24:16,034 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 25 [2021-11-19 04:24:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:16,035 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2021-11-19 04:24:16,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 25 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:24:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2021-11-19 04:24:16,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:24:16,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:16,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:16,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:16,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:24:16,256 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:16,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1773279229, now seen corresponding path program 2 times [2021-11-19 04:24:16,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:24:16,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801610778] [2021-11-19 04:24:16,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:24:16,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:24:16,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:24:16,259 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:24:16,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 04:24:16,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:24:16,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:16,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:24:16,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:17,749 INFO L354 Elim1Store]: treesize reduction 71, result has 37.2 percent of original size [2021-11-19 04:24:17,750 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 72 [2021-11-19 04:24:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:19,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:30,683 INFO L354 Elim1Store]: treesize reduction 141, result has 16.6 percent of original size [2021-11-19 04:24:30,684 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 46 [2021-11-19 04:24:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:24:31,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:24:31,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801610778] [2021-11-19 04:24:31,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801610778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:31,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:24:31,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-11-19 04:24:31,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817638719] [2021-11-19 04:24:31,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:31,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:24:31,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:24:31,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:24:31,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=820, Unknown=2, NotChecked=0, Total=930 [2021-11-19 04:24:31,291 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 25 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:24:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:41,027 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2021-11-19 04:24:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:24:41,028 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 25 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-11-19 04:24:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:41,029 INFO L225 Difference]: With dead ends: 96 [2021-11-19 04:24:41,030 INFO L226 Difference]: Without dead ends: 94 [2021-11-19 04:24:41,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=254, Invalid=1903, Unknown=5, NotChecked=0, Total=2162 [2021-11-19 04:24:41,032 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 46 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:41,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 498 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 227 Unchecked, 0.5s Time] [2021-11-19 04:24:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-19 04:24:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-11-19 04:24:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 44 states have internal predecessors, (59), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:24:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2021-11-19 04:24:41,048 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 25 [2021-11-19 04:24:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:41,049 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2021-11-19 04:24:41,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 25 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:24:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2021-11-19 04:24:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:24:41,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:41,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:41,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:41,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:24:41,263 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:41,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1186473215, now seen corresponding path program 2 times [2021-11-19 04:24:41,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:24:41,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452301530] [2021-11-19 04:24:41,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:24:41,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:24:41,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:24:41,266 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:24:41,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 04:24:41,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:24:41,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:41,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:24:41,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:43,127 INFO L354 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2021-11-19 04:24:43,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 71 [2021-11-19 04:24:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:45,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:52,990 INFO L354 Elim1Store]: treesize reduction 76, result has 24.0 percent of original size [2021-11-19 04:24:52,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 41 [2021-11-19 04:24:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:24:53,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:24:53,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452301530] [2021-11-19 04:24:53,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452301530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:53,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:24:53,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-11-19 04:24:53,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827116197] [2021-11-19 04:24:53,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:53,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:24:53,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:24:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:24:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:24:53,440 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 25 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:24:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:56,511 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2021-11-19 04:24:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:24:56,512 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 25 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-11-19 04:24:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:56,513 INFO L225 Difference]: With dead ends: 91 [2021-11-19 04:24:56,513 INFO L226 Difference]: Without dead ends: 89 [2021-11-19 04:24:56,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:24:56,515 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:56,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 442 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 208 Unchecked, 0.4s Time] [2021-11-19 04:24:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-19 04:24:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 53. [2021-11-19 04:24:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 43 states have internal predecessors, (57), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:24:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2021-11-19 04:24:56,529 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 25 [2021-11-19 04:24:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:56,530 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2021-11-19 04:24:56,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 25 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:24:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2021-11-19 04:24:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:24:56,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:56,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:56,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:56,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:24:56,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:56,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1270583733, now seen corresponding path program 1 times [2021-11-19 04:24:56,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:24:56,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603761215] [2021-11-19 04:24:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:56,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:24:56,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:24:56,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:24:56,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 04:24:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:56,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:24:56,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:56,881 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 [2021-11-19 04:24:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:24:56,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:56,973 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-19 04:24:56,974 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 19 treesize of output 11 [2021-11-19 04:24:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:24:57,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:24:57,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603761215] [2021-11-19 04:24:57,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603761215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:57,050 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:57,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 04:24:57,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798620087] [2021-11-19 04:24:57,050 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:57,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:24:57,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:24:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:24:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:24:57,052 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:24:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:57,200 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2021-11-19 04:24:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:24:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2021-11-19 04:24:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:57,203 INFO L225 Difference]: With dead ends: 83 [2021-11-19 04:24:57,203 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 04:24:57,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:24:57,204 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:57,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 235 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:24:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 04:24:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-11-19 04:24:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.375) internal successors, (77), 61 states have internal predecessors, (77), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:24:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2021-11-19 04:24:57,226 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 28 [2021-11-19 04:24:57,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:57,227 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2021-11-19 04:24:57,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:24:57,227 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2021-11-19 04:24:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:24:57,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:57,229 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:57,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:57,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:24:57,433 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:57,433 INFO L85 PathProgramCache]: Analyzing trace with hash 820149024, now seen corresponding path program 3 times [2021-11-19 04:24:57,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:24:57,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756467873] [2021-11-19 04:24:57,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:24:57,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:24:57,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:24:57,435 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:24:57,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 04:24:57,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:24:57,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:57,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:24:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:57,504 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 7 treesize of output 6 [2021-11-19 04:24:59,575 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_13| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_13|))) is different from true [2021-11-19 04:24:59,605 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 29 treesize of output 23 [2021-11-19 04:24:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:24:59,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 04:25:09,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:25:09,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756467873] [2021-11-19 04:25:09,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756467873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:09,942 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:09,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 13 [2021-11-19 04:25:09,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898318019] [2021-11-19 04:25:09,943 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:09,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:25:09,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:25:09,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:25:09,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=102, Unknown=6, NotChecked=20, Total=156 [2021-11-19 04:25:09,944 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:14,088 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2021-11-19 04:25:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:25:14,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-11-19 04:25:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:14,089 INFO L225 Difference]: With dead ends: 85 [2021-11-19 04:25:14,090 INFO L226 Difference]: Without dead ends: 83 [2021-11-19 04:25:14,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=46, Invalid=160, Unknown=8, NotChecked=26, Total=240 [2021-11-19 04:25:14,091 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:14,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 166 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2021-11-19 04:25:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-19 04:25:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 47. [2021-11-19 04:25:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:25:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-19 04:25:14,105 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 27 [2021-11-19 04:25:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:14,105 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-19 04:25:14,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-19 04:25:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:25:14,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:14,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:14,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:14,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:25:14,318 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1943727032, now seen corresponding path program 1 times [2021-11-19 04:25:14,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:25:14,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926008433] [2021-11-19 04:25:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:14,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:25:14,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:25:14,320 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:25:14,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 04:25:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:14,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:25:14,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:15,247 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-19 04:25:15,247 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 3 case distinctions, treesize of input 35 treesize of output 20 [2021-11-19 04:25:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:15,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:16,020 INFO L354 Elim1Store]: treesize reduction 73, result has 17.0 percent of original size [2021-11-19 04:25:16,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 22 [2021-11-19 04:25:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:25:16,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:25:16,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926008433] [2021-11-19 04:25:16,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926008433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:16,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:16,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2021-11-19 04:25:16,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715690825] [2021-11-19 04:25:16,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:16,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 04:25:16,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:25:16,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 04:25:16,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:25:16,160 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:25:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:18,309 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2021-11-19 04:25:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 04:25:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2021-11-19 04:25:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:18,312 INFO L225 Difference]: With dead ends: 95 [2021-11-19 04:25:18,312 INFO L226 Difference]: Without dead ends: 93 [2021-11-19 04:25:18,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 04:25:18,313 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:18,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 362 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 292 Invalid, 0 Unknown, 65 Unchecked, 0.7s Time] [2021-11-19 04:25:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-19 04:25:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2021-11-19 04:25:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:25:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-11-19 04:25:18,337 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 30 [2021-11-19 04:25:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:18,337 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-11-19 04:25:18,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:25:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-11-19 04:25:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:25:18,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:18,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:18,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:18,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:25:18,548 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:18,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1112024125, now seen corresponding path program 1 times [2021-11-19 04:25:18,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:25:18,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536137182] [2021-11-19 04:25:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:18,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:25:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:25:18,550 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:25:18,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 04:25:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:18,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:25:18,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:48,404 INFO L354 Elim1Store]: treesize reduction 32, result has 86.5 percent of original size [2021-11-19 04:25:48,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 225 [2021-11-19 04:25:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:48,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:01,749 INFO L354 Elim1Store]: treesize reduction 43, result has 49.4 percent of original size [2021-11-19 04:26:01,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 52 [2021-11-19 04:26:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:26:05,935 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:26:05,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536137182] [2021-11-19 04:26:05,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536137182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:26:05,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:26:05,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-11-19 04:26:05,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735618380] [2021-11-19 04:26:05,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:05,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:26:05,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:26:05,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:26:05,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=419, Unknown=20, NotChecked=0, Total=506 [2021-11-19 04:26:05,937 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 23 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:26:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:26:33,490 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2021-11-19 04:26:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:26:33,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-11-19 04:26:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:26:33,493 INFO L225 Difference]: With dead ends: 116 [2021-11-19 04:26:33,493 INFO L226 Difference]: Without dead ends: 114 [2021-11-19 04:26:33,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 72.8s TimeCoverageRelationStatistics Valid=120, Invalid=777, Unknown=33, NotChecked=0, Total=930 [2021-11-19 04:26:33,494 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 73 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:26:33,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 504 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 175 Invalid, 0 Unknown, 203 Unchecked, 0.5s Time] [2021-11-19 04:26:33,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-19 04:26:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 67. [2021-11-19 04:26:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.26) internal successors, (63), 52 states have internal predecessors, (63), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:26:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-11-19 04:26:33,514 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 32 [2021-11-19 04:26:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:26:33,515 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-11-19 04:26:33,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:26:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-11-19 04:26:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:26:33,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:26:33,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:26:33,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:33,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:26:33,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:26:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash -110653822, now seen corresponding path program 2 times [2021-11-19 04:26:33,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:26:33,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252156125] [2021-11-19 04:26:33,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:26:33,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:26:33,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:26:33,751 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:26:33,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 04:26:33,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:26:33,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:26:33,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 04:26:33,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:35,497 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-19 04:26:35,498 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 3 case distinctions, treesize of input 35 treesize of output 20 [2021-11-19 04:26:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:35,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:38,263 INFO L354 Elim1Store]: treesize reduction 71, result has 19.3 percent of original size [2021-11-19 04:26:38,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 24 [2021-11-19 04:26:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:26:38,507 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:26:38,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252156125] [2021-11-19 04:26:38,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252156125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:26:38,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:26:38,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 30 [2021-11-19 04:26:38,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827960950] [2021-11-19 04:26:38,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:38,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:26:38,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:26:38,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:26:38,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:26:38,509 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:26:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:26:53,205 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2021-11-19 04:26:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-19 04:26:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2021-11-19 04:26:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:26:53,209 INFO L225 Difference]: With dead ends: 165 [2021-11-19 04:26:53,209 INFO L226 Difference]: Without dead ends: 163 [2021-11-19 04:26:53,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=794, Invalid=4462, Unknown=0, NotChecked=0, Total=5256 [2021-11-19 04:26:53,212 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 229 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:26:53,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 642 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 865 Invalid, 0 Unknown, 117 Unchecked, 3.6s Time] [2021-11-19 04:26:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-19 04:26:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 75. [2021-11-19 04:26:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 60 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:26:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2021-11-19 04:26:53,238 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 34 [2021-11-19 04:26:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:26:53,239 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2021-11-19 04:26:53,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:26:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2021-11-19 04:26:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:26:53,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:26:53,240 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:26:53,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:53,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:26:53,455 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:26:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash 108200896, now seen corresponding path program 2 times [2021-11-19 04:26:53,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:26:53,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118530276] [2021-11-19 04:26:53,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:26:53,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:26:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:26:53,458 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:26:53,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 04:26:53,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:26:53,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:26:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:26:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:56,132 INFO L354 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2021-11-19 04:26:56,132 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 27 [2021-11-19 04:26:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:56,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:27:06,377 INFO L354 Elim1Store]: treesize reduction 209, result has 11.4 percent of original size [2021-11-19 04:27:06,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 41 [2021-11-19 04:27:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:27:06,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:27:06,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118530276] [2021-11-19 04:27:06,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118530276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:27:06,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:27:06,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-11-19 04:27:06,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064446595] [2021-11-19 04:27:06,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:27:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:27:06,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:27:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:27:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=802, Unknown=3, NotChecked=0, Total=930 [2021-11-19 04:27:06,779 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 31 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:27:12,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:27:38,989 WARN L227 SmtUtils]: Spent 24.45s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:27:42,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:28:24,192 WARN L227 SmtUtils]: Spent 38.39s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:28:26,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:28:28,250 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:28:30,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:28:46,659 WARN L227 SmtUtils]: Spent 10.16s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:28:48,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:28:50,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:28:55,407 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:29:38,269 WARN L227 SmtUtils]: Spent 38.47s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:29:40,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:19,223 WARN L227 SmtUtils]: Spent 38.43s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:30:21,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:23,273 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:25,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:27,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:44,028 WARN L227 SmtUtils]: Spent 10.14s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:30:46,184 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:48,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:50,252 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:52,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:54,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:56,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:58,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:18,834 WARN L227 SmtUtils]: Spent 10.16s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:31:21,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:35,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:37,396 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:39,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:41,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:43,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:45,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:47,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:49,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:54,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:56,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:58,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:32:00,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:32:02,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:32:04,473 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:32:07,634 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:32:09,683 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:32:11,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:32:13,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:32:44,949 WARN L227 SmtUtils]: Spent 24.66s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:32:46,955 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:32:48,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:33:07,477 WARN L227 SmtUtils]: Spent 10.24s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:33:50,530 WARN L227 SmtUtils]: Spent 38.62s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:33:52,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:33:55,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:33:57,105 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:34:19,759 WARN L227 SmtUtils]: Spent 10.29s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:35:00,844 WARN L227 SmtUtils]: Spent 38.61s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:35:05,475 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:35:07,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:35:14,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:35:16,180 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:35:24,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:35:26,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:35:28,976 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:35:30,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:35:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:31,510 INFO L93 Difference]: Finished difference Result 208 states and 273 transitions. [2021-11-19 04:35:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-19 04:35:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2021-11-19 04:35:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:31,516 INFO L225 Difference]: With dead ends: 208 [2021-11-19 04:35:31,516 INFO L226 Difference]: Without dead ends: 206 [2021-11-19 04:35:31,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 404.3s TimeCoverageRelationStatistics Valid=923, Invalid=4884, Unknown=45, NotChecked=0, Total=5852 [2021-11-19 04:35:31,520 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 320 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 273 mSolverCounterUnsat, 52 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 52 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 111.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:31,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 684 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 891 Invalid, 52 Unknown, 182 Unchecked, 111.1s Time] [2021-11-19 04:35:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-19 04:35:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 87. [2021-11-19 04:35:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.4714285714285715) internal successors, (103), 72 states have internal predecessors, (103), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:35:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 121 transitions. [2021-11-19 04:35:31,552 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 121 transitions. Word has length 34 [2021-11-19 04:35:31,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:31,553 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 121 transitions. [2021-11-19 04:35:31,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:35:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 121 transitions. [2021-11-19 04:35:31,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:35:31,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:31,555 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:31,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-19 04:35:31,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:35:31,773 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash 483067350, now seen corresponding path program 1 times [2021-11-19 04:35:31,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:35:31,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248287434] [2021-11-19 04:35:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:31,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:35:31,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:35:31,775 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:35:31,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 04:35:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:35:31,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:35:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:35:32,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:35:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:35:32,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:35:32,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248287434] [2021-11-19 04:35:32,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248287434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:35:32,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:35:32,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-11-19 04:35:32,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210249481] [2021-11-19 04:35:32,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:35:32,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:35:32,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:35:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:35:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:35:32,675 INFO L87 Difference]: Start difference. First operand 87 states and 121 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 04:35:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:33,216 INFO L93 Difference]: Finished difference Result 109 states and 148 transitions. [2021-11-19 04:35:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:35:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 36 [2021-11-19 04:35:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:33,218 INFO L225 Difference]: With dead ends: 109 [2021-11-19 04:35:33,218 INFO L226 Difference]: Without dead ends: 89 [2021-11-19 04:35:33,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:35:33,219 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:33,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 126 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-19 04:35:33,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-19 04:35:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 73 states have internal predecessors, (104), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:35:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-11-19 04:35:33,256 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 36 [2021-11-19 04:35:33,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:33,257 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-11-19 04:35:33,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 04:35:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-11-19 04:35:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:35:33,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:33,259 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-19 04:35:33,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:35:33,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:35:33,461 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:33,461 INFO L85 PathProgramCache]: Analyzing trace with hash -599274181, now seen corresponding path program 3 times [2021-11-19 04:35:33,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:35:33,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561612165] [2021-11-19 04:35:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:35:33,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:35:33,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:35:33,463 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:35:33,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 04:35:33,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:35:33,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:35:33,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:35:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:35:33,541 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 7 treesize of output 6 [2021-11-19 04:35:35,625 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_31| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_31|))) is different from true [2021-11-19 04:35:37,676 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_32| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_32|))) is different from true [2021-11-19 04:35:37,717 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 29 treesize of output 23 [2021-11-19 04:35:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 2 not checked. [2021-11-19 04:35:37,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:35:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:35:48,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:35:48,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561612165] [2021-11-19 04:35:48,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561612165] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 04:35:48,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:35:48,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-19 04:35:48,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436703964] [2021-11-19 04:35:48,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:48,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:35:48,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:35:48,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:35:48,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=103, Unknown=7, NotChecked=42, Total=182 [2021-11-19 04:35:48,204 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:35:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:48,275 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2021-11-19 04:35:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:35:48,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-19 04:35:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:48,277 INFO L225 Difference]: With dead ends: 97 [2021-11-19 04:35:48,277 INFO L226 Difference]: Without dead ends: 95 [2021-11-19 04:35:48,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=34, Invalid=123, Unknown=7, NotChecked=46, Total=210 [2021-11-19 04:35:48,278 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:48,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 132 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2021-11-19 04:35:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-19 04:35:48,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 41. [2021-11-19 04:35:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:35:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-11-19 04:35:48,290 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2021-11-19 04:35:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:48,291 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-11-19 04:35:48,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:35:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-11-19 04:35:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:35:48,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:48,292 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:48,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 04:35:48,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:35:48,499 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:48,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:48,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1210556717, now seen corresponding path program 1 times [2021-11-19 04:35:48,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:35:48,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537881605] [2021-11-19 04:35:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:48,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:35:48,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:35:48,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:35:48,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 04:35:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:35:48,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:35:48,730 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 19 treesize of output 7 [2021-11-19 04:35:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:35:48,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:35:48,893 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-19 04:35:48,894 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 19 treesize of output 11 [2021-11-19 04:35:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:35:49,117 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:35:49,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537881605] [2021-11-19 04:35:49,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537881605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:35:49,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:35:49,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-19 04:35:49,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467466966] [2021-11-19 04:35:49,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:35:49,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:35:49,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:35:49,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:35:49,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:35:49,119 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 04:35:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:50,237 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2021-11-19 04:35:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:35:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 38 [2021-11-19 04:35:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:50,239 INFO L225 Difference]: With dead ends: 85 [2021-11-19 04:35:50,239 INFO L226 Difference]: Without dead ends: 83 [2021-11-19 04:35:50,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:35:50,241 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 33 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:50,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 341 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:35:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-19 04:35:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2021-11-19 04:35:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 04:35:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2021-11-19 04:35:50,272 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 38 [2021-11-19 04:35:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:50,272 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2021-11-19 04:35:50,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 04:35:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2021-11-19 04:35:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:35:50,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:50,274 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:50,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 04:35:50,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:35:50,488 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1720029807, now seen corresponding path program 1 times [2021-11-19 04:35:50,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:35:50,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850842215] [2021-11-19 04:35:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:50,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:35:50,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:35:50,491 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:35:50,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 04:35:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:50,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 04:35:50,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:35:52,257 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-19 04:35:52,257 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 3 case distinctions, treesize of input 40 treesize of output 23 [2021-11-19 04:35:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:35:52,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:35:53,409 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-11-19 04:35:53,409 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 17 [2021-11-19 04:35:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:35:53,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:35:53,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850842215] [2021-11-19 04:35:53,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850842215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:35:53,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:35:53,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2021-11-19 04:35:53,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237869134] [2021-11-19 04:35:53,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:35:53,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:35:53,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:35:53,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:35:53,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:35:53,604 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 04:35:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:57,019 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2021-11-19 04:35:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:35:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 38 [2021-11-19 04:35:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:57,021 INFO L225 Difference]: With dead ends: 103 [2021-11-19 04:35:57,021 INFO L226 Difference]: Without dead ends: 101 [2021-11-19 04:35:57,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=262, Invalid=1718, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 04:35:57,023 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 113 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:57,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 502 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 410 Invalid, 0 Unknown, 177 Unchecked, 1.2s Time] [2021-11-19 04:35:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-19 04:35:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-11-19 04:35:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 60 states have internal predecessors, (64), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:35:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-11-19 04:35:57,058 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 38 [2021-11-19 04:35:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:57,058 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-11-19 04:35:57,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 04:35:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-11-19 04:35:57,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:35:57,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:57,059 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:57,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 04:35:57,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:35:57,271 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:57,271 INFO L85 PathProgramCache]: Analyzing trace with hash -990679920, now seen corresponding path program 2 times [2021-11-19 04:35:57,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:35:57,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139122219] [2021-11-19 04:35:57,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:35:57,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:35:57,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:35:57,273 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:35:57,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 04:35:57,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:35:57,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:35:57,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:35:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:35:58,915 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-19 04:35:58,915 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 3 case distinctions, treesize of input 35 treesize of output 20 [2021-11-19 04:35:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:35:59,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:00,032 INFO L354 Elim1Store]: treesize reduction 79, result has 16.0 percent of original size [2021-11-19 04:36:00,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 22 [2021-11-19 04:36:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:36:00,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:36:00,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139122219] [2021-11-19 04:36:00,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139122219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:36:00,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:36:00,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 27 [2021-11-19 04:36:00,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61146048] [2021-11-19 04:36:00,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:00,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:36:00,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:36:00,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:36:00,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:36:00,384 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 24 states have internal predecessors, (50), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 04:36:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:07,447 INFO L93 Difference]: Finished difference Result 171 states and 201 transitions. [2021-11-19 04:36:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 04:36:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 24 states have internal predecessors, (50), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 40 [2021-11-19 04:36:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:07,451 INFO L225 Difference]: With dead ends: 171 [2021-11-19 04:36:07,451 INFO L226 Difference]: Without dead ends: 169 [2021-11-19 04:36:07,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=363, Invalid=2607, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:36:07,454 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 162 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:07,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 507 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 473 Invalid, 0 Unknown, 97 Unchecked, 1.8s Time] [2021-11-19 04:36:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-19 04:36:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 124. [2021-11-19 04:36:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 95 states have internal predecessors, (104), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (20), 15 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-19 04:36:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2021-11-19 04:36:07,527 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 40 [2021-11-19 04:36:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:07,528 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2021-11-19 04:36:07,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 24 states have internal predecessors, (50), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 04:36:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2021-11-19 04:36:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:36:07,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:07,532 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:07,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:07,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:36:07,747 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:07,748 INFO L85 PathProgramCache]: Analyzing trace with hash -651948597, now seen corresponding path program 1 times [2021-11-19 04:36:07,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:36:07,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370344894] [2021-11-19 04:36:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:07,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:36:07,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:36:07,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:36:07,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21904d25-9ca0-43bf-8d54-40192411ceba/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 04:36:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:07,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:36:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:45,825 WARN L227 SmtUtils]: Spent 6.21s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:36:52,331 WARN L227 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:37:21,124 WARN L227 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)